Add a new extended feature bit signifying that the wireless hardware
supports changing the MAC address while the underlying net_device is
powered. Note that this has a different meaning from
IFF_LIVE_ADDR_CHANGE as additional restrictions might be imposed by
the hardware, such as:
- No connection is active on this interface, carrier is off
- No scan is in progress
- No offchannel operations are in progress
Signed-off-by: James Prestwood <prestwoj@xxxxxxxxx>
---
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 d9490e3062a7..57ead424a0c3 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -6174,6 +6174,14 @@ enum nl80211_feature_flags {
* @NL80211_EXT_FEATURE_RADAR_BACKGROUND: Device supports background radar/CAC
* detection.
*
+ * @NL80211_EXT_FEATURE_POWERED_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.
*/
@@ -6241,6 +6249,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_BSS_COLOR,
NL80211_EXT_FEATURE_FILS_CRYPTO_OFFLOAD,
NL80211_EXT_FEATURE_RADAR_BACKGROUND,
+ NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,
--
2.34.3
