qcacld-3.0: Add support for silent deauth

Add support to facilitate silent deauthentication to peer
stations in master mode.

Change-Id: I8c92d68d7ae94d1d425bfcb6744bed84b67f1f3b
CRs-Fixed: 3070885

core/hdd/src/wlan_hdd_son.c

@@ -1254,6 +1254,29 @@ static uint8_t hdd_son_get_rx_nss(struct wlan_objmgr_vdev *vdev)
 	return rx_nss;
 }
 
+static void hdd_son_deauth_sta(struct wlan_objmgr_vdev *vdev,
+			       uint8_t *peer_mac,
+			       bool ignore_frame)
+{
+	struct hdd_adapter *adapter = wlan_hdd_get_adapter_from_objmgr(vdev);
+	struct csr_del_sta_params param;
+
+	if (!adapter) {
+		hdd_err("null adapter");
+		return;
+	}
+
+	qdf_mem_copy(param.peerMacAddr.bytes, peer_mac, QDF_MAC_ADDR_SIZE);
+	param.subtype = SIR_MAC_MGMT_DEAUTH;
+	param.reason_code = ignore_frame ? REASON_HOST_TRIGGERED_SILENT_DEAUTH
+					 : REASON_UNSPEC_FAILURE;
+	hdd_debug("Peer - "QDF_MAC_ADDR_FMT" Ignore Frame - %u",
+		  QDF_FULL_MAC_REF(peer_mac), ignore_frame);
+
+	if (hdd_softap_sta_deauth(adapter, &param) != QDF_STATUS_SUCCESS)
+		hdd_err("Error in deauthenticating peer");
+}
+
 void hdd_son_register_callbacks(struct hdd_context *hdd_ctx)
 {
 	struct son_callbacks cb_obj = {0};
@@ -1277,6 +1300,7 @@ void hdd_son_register_callbacks(struct hdd_context *hdd_ctx)
 	cb_obj.os_if_get_rx_nss = hdd_son_get_rx_nss;
 	cb_obj.os_if_set_chwidth = hdd_son_set_chwidth;
 	cb_obj.os_if_get_chwidth = hdd_son_get_chwidth;
+	cb_obj.os_if_deauth_sta = hdd_son_deauth_sta;
 
 	os_if_son_register_hdd_callbacks(hdd_ctx->psoc, &cb_obj);
 }

core/mac/src/pe/lim/lim_send_management_frames.c

@@ -3901,24 +3901,37 @@ lim_send_deauth_mgmt_frame(struct mac_context *mac,
 #endif
 	uint8_t smeSessionId = 0;
 	struct element_info *discon_ie;
+	bool drop_deauth = false;
 
 	if (!pe_session) {
 		return;
 	}
 
 	/*
-	 * In case when cac timer is running for this SAP session then
-	 * avoid deauth frame out. It is violation of dfs specification.
+	 * Avoid sending deauth frame out when
+	 * 1. CAC timer is running for this SAP session,
+	 *    It is avoid violation of dfs specification.
+	 * 2. Silent deauth is requested for a particular peer
 	 */
-	if (((pe_session->opmode == QDF_SAP_MODE) ||
-	    (pe_session->opmode == QDF_P2P_GO_MODE)) &&
-	    (true == mac->sap.SapDfsInfo.is_dfs_cac_timer_running)) {
-		QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO,
-			  FL
+	if ((pe_session->opmode == QDF_SAP_MODE) ||
+	    (pe_session->opmode == QDF_P2P_GO_MODE)) {
+		if (mac->sap.SapDfsInfo.is_dfs_cac_timer_running) {
+			QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO,
+				  FL
 				  ("CAC timer is running, drop the deauth from going out"));
-		if (waitForAck)
-			lim_send_deauth_cnf(mac);
-		return;
+			drop_deauth = true;
+		}
+		if (nReason == REASON_HOST_TRIGGERED_SILENT_DEAUTH) {
+			QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_INFO,
+				  FL
+				  ("Silent deauth, remove the peer"));
+			drop_deauth = true;
+		}
+		if (drop_deauth) {
+			if (waitForAck)
+				lim_send_deauth_cnf(mac);
+			return;
+		}
 	}
 	smeSessionId = pe_session->smeSessionId;
 

os_if/son/inc/os_if_son.h

@@ -53,6 +53,7 @@
  * @os_if_kickout_mac: kickout sta with given mac
  * @os_if_set_chwidth: set chan width
  * @os_if_get_chwidth: get chan width
+ * @os_if_deauth_sta: Deauths the target peer
  */
 struct son_callbacks {
 	uint32_t (*os_if_is_acs_in_progress)(struct wlan_objmgr_vdev *vdev);
@@ -91,6 +92,9 @@ struct son_callbacks {
 				 enum ieee80211_cwm_width son_chwidth);
 	enum ieee80211_cwm_width (*os_if_get_chwidth)(
 				struct wlan_objmgr_vdev *vdev);
+	void (*os_if_deauth_sta)(struct wlan_objmgr_vdev *vdev,
+				 uint8_t *peer_mac,
+				 bool ignore_frame);
 };
 
 /**
@@ -465,4 +469,16 @@ int os_if_son_set_chwidth(struct wlan_objmgr_vdev *vdev,
  * Return: son chan width
  */
 enum ieee80211_cwm_width os_if_son_get_chwidth(struct wlan_objmgr_vdev *vdev);
+
+/**
+ * os_if_son_deauth_peer_sta - Deauths specified STA
+ * @vdev: vdev
+ * @peer_mac: Target peer MAC address
+ * @ignore_frame: True to silently deauth the peer
+ *
+ * Return: void
+ */
+void os_if_son_deauth_peer_sta(struct wlan_objmgr_vdev *vdev,
+			       uint8_t *peer_mac,
+			       bool ignore_frame);
 #endif

os_if/son/src/os_if_son.c

@@ -911,3 +911,17 @@ bool os_if_son_vdev_is_wds(struct wlan_objmgr_vdev *vdev)
 }
 
 qdf_export_symbol(os_if_son_vdev_is_wds);
+
+void os_if_son_deauth_peer_sta(struct wlan_objmgr_vdev *vdev,
+			       uint8_t *peer_mac,
+			       bool ignore_frame)
+{
+	if (!vdev || !peer_mac) {
+		osif_err("null vdev / peer_mac");
+		return;
+	}
+	if (g_son_os_if_cb.os_if_deauth_sta)
+		g_son_os_if_cb.os_if_deauth_sta(vdev, peer_mac, ignore_frame);
+}
+
+qdf_export_symbol(os_if_son_deauth_peer_sta);