@@ -5521,6 +5521,9 @@ enum nl80211_feature_flags {
* feature, which prevents bufferbloat by using the expected transmission
* time to limit the amount of data buffered in the hardware.
*
+ * @NL80211_EXT_FEATURE_DEL_IBSS_STA: The driver supports removing stations
+ * in IBSS mode, essentially by dropping their state.
+ *
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
*/
@@ -5568,6 +5571,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_SAE_OFFLOAD,
NL80211_EXT_FEATURE_VLAN_OFFLOAD,
NL80211_EXT_FEATURE_AQL,
+ NL80211_EXT_FEATURE_DEL_IBSS_STA,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,
@@ -6073,8 +6073,13 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
- dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
+ dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO &&
+ dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
return -EINVAL;
+ if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC &&
+ !wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_DEL_IBSS_STA))
+ return -EOPNOTSUPP;
if (!rdev->ops->del_station)
return -EOPNOTSUPP;
Sometimes, userspace is able to detect that a peer silently lost its state (like, if the peer reboots). wpa_supplicant does this for IBSS-RSN and currently only resets the key of the peer so that it can attempt another handshake. However, the kernel also hold state about the station, such as BA sessions, probe response parameters and the like. They also need to be resetted correctly. This patch adds the NL80211_EXT_FEATURE_DEL_IBSS_STA feature flag indicating the driver accepts deleting stations in IBSS mode, which should send a deauth and reset the state of the station, just like in mesh point mode. Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr> --- include/uapi/linux/nl80211.h | 4 ++++ net/wireless/nl80211.c | 7 ++++++- 2 files changed, 10 insertions(+), 1 deletion(-)