wifi: mac80211: Add processing of TTLM teardown frame

Add processing of negotiated TTLM tear down frame.
Handle this frame similar to the way a locally initiated
tear down is handled.

Signed-off-by: Ilan Peer <[e-mail]>
Reviewed-by: Johannes Berg <[e-mail]>
Signed-off-by: Miri Korenblit <[e-mail]>
Link: https://patch.msgid.link/20250205110958.860691076786.I32df71182c25c5f84e4534f40efe1316926b8249@changeid
Signed-off-by: Johannes Berg <[e-mail]>

net/mac80211/ieee80211_i.h

···
 				    struct ieee80211_mgmt *mgmt, size_t len);
 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata,
 			   struct cfg80211_ttlm_params *params);
+void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata);
 
 void ieee80211_check_wbrf_support(struct ieee80211_local *local);
 void ieee80211_add_wbrf(struct ieee80211_local *local, struct cfg80211_chan_def *chandef);

net/mac80211/iface.c

···
 				ieee80211_process_neg_ttlm_res(sdata, mgmt,
 							       skb->len);
 				break;
+			case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
+				ieee80211_process_ttlm_teardown(sdata);
+				break;
 			case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
 				ieee80211_process_ml_reconf_resp(sdata, mgmt,
 								 skb->len);

net/mac80211/mlme.c

···
 		__ieee80211_disconnect(sdata);
 }
 
-static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy,
-					 struct wiphy_work *work)
+void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata)
 {
 	u16 new_dormant_links;
-	struct ieee80211_sub_if_data *sdata =
-		container_of(work, struct ieee80211_sub_if_data,
-			     u.mgd.teardown_ttlm_work);
 
 	if (!sdata->vif.neg_ttlm.valid)
 		return;
···
 				new_dormant_links);
 	ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM |
 					       BSS_CHANGED_MLD_VALID_LINKS);
+}
+
+static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy,
+					 struct wiphy_work *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.teardown_ttlm_work);
+
+	ieee80211_process_ttlm_teardown(sdata);
 }
 
 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif)

net/mac80211/rx.c

···
 					      u.action.u.ttlm_res))
 				goto invalid;
 			goto queue;
+		case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
+			if (sdata->vif.type != NL80211_IFTYPE_STATION)
+				break;
+
+			if (len < offsetofend(typeof(*mgmt),
+					      u.action.u.ttlm_tear_down))
+				goto invalid;
+			goto queue;
 		case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
 			if (sdata->vif.type != NL80211_IFTYPE_STATION)
 				break;