Bluetooth: Enable/Disable address resolution during le create conn

In this patch if le_create_conn process is started restrict to
disable address resolution and same is disabled during
le_enh_connection_complete

Signed-off-by: Sathish Narasimman <sathish.narasimman@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_conn.c

@@ -1003,6 +1003,11 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 	struct hci_request req;
 	int err;
 
+	/* This ensures that during disable le_scan address resolution
+	 * will not be disabled if it is followed by le_create_conn
+	 */
+	bool rpa_le_conn = true;
+
 	/* Let's make sure that le is enabled.*/
 	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
 		if (lmp_le_capable(hdev))
@@ -1103,7 +1108,7 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 	 * state.
 	 */
 	if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
-		hci_req_add_le_scan_disable(&req);
+		hci_req_add_le_scan_disable(&req, rpa_le_conn);
 		hci_dev_set_flag(hdev, HCI_LE_SCAN_INTERRUPTED);
 	}
 

net/bluetooth/hci_event.c

@@ -5228,6 +5228,10 @@ static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev,
 			     le16_to_cpu(ev->interval),
 			     le16_to_cpu(ev->latency),
 			     le16_to_cpu(ev->supervision_timeout));
+
+	if (use_ll_privacy(hdev) &&
+	    hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
+		hci_req_disable_address_resolution(hdev);
 }
 
 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, struct sk_buff *skb)

net/bluetooth/hci_request.c

@@ -428,7 +428,7 @@ static void __hci_update_background_scan(struct hci_request *req)
 		if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
 			return;
 
-		hci_req_add_le_scan_disable(req);
+		hci_req_add_le_scan_disable(req, false);
 
 		BT_DBG("%s stopping background scanning", hdev->name);
 	} else {
@@ -447,7 +447,7 @@ static void __hci_update_background_scan(struct hci_request *req)
 		 * don't miss any advertising (due to duplicates filter).
 		 */
 		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
-			hci_req_add_le_scan_disable(req);
+			hci_req_add_le_scan_disable(req, false);
 
 		hci_req_add_le_passive_scan(req);
 
@@ -652,7 +652,7 @@ void __hci_req_update_eir(struct hci_request *req)
 	hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
 }
 
-void hci_req_add_le_scan_disable(struct hci_request *req)
+void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn)
 {
 	struct hci_dev *hdev = req->hdev;
 
@@ -676,8 +676,9 @@ void hci_req_add_le_scan_disable(struct hci_request *req)
 		hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
 	}
 
+	/* Disable address resolution */
 	if (use_ll_privacy(hdev) &&
-	    hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION)) {
+	    hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION) && !rpa_le_conn) {
 		__u8 enable = 0x00;
 		hci_req_add(req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
 	}
@@ -1072,7 +1073,7 @@ static void hci_req_config_le_suspend_scan(struct hci_request *req)
 {
 	/* Before changing params disable scan if enabled */
 	if (hci_dev_test_flag(req->hdev, HCI_LE_SCAN))
-		hci_req_add_le_scan_disable(req);
+		hci_req_add_le_scan_disable(req, false);
 
 	/* Configure params and enable scanning */
 	hci_req_add_le_passive_scan(req);
@@ -1140,7 +1141,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
 
 		/* Disable LE passive scan if enabled */
 		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
-			hci_req_add_le_scan_disable(&req);
+			hci_req_add_le_scan_disable(&req, false);
 
 		/* Mark task needing completion */
 		set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
@@ -1696,6 +1697,28 @@ int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance)
 	return hci_req_run(&req, NULL);
 }
 
+static void enable_addr_resolution_complete(struct hci_dev *hdev, u8 status,
+					    u16 opcode)
+{
+	BT_DBG("%s status %u", hdev->name, status);
+}
+
+void hci_req_disable_address_resolution(struct hci_dev *hdev)
+{
+	struct hci_request req;
+	__u8 enable = 0x00;
+
+	if (!use_ll_privacy(hdev) &&
+	    !hci_dev_test_flag(hdev, HCI_LL_RPA_RESOLUTION))
+		return;
+
+	hci_req_init(&req, hdev);
+
+	hci_req_add(&req, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE, 1, &enable);
+
+	hci_req_run(&req, enable_addr_resolution_complete);
+}
+
 static void adv_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode)
 {
 	BT_DBG("%s status %u", hdev->name, status);
@@ -2667,7 +2690,7 @@ static void bg_scan_update(struct work_struct *work)
 
 static int le_scan_disable(struct hci_request *req, unsigned long opt)
 {
-	hci_req_add_le_scan_disable(req);
+	hci_req_add_le_scan_disable(req, false);
 	return 0;
 }
 
@@ -2770,7 +2793,7 @@ static int le_scan_restart(struct hci_request *req, unsigned long opt)
 		return 0;
 	}
 
-	hci_req_add_le_scan_disable(req);
+	hci_req_add_le_scan_disable(req, false);
 
 	if (use_ext_scan(hdev)) {
 		struct hci_cp_le_set_ext_scan_enable ext_enable_cp;
@@ -2861,7 +2884,7 @@ static int active_scan(struct hci_request *req, unsigned long opt)
 	 * discovery scanning parameters.
 	 */
 	if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
-		hci_req_add_le_scan_disable(req);
+		hci_req_add_le_scan_disable(req, false);
 
 	/* All active scans will be done with either a resolvable private
 	 * address (when privacy feature has been enabled) or non-resolvable
@@ -2976,14 +2999,14 @@ bool hci_req_stop_discovery(struct hci_request *req)
 
 		if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
 			cancel_delayed_work(&hdev->le_scan_disable);
-			hci_req_add_le_scan_disable(req);
+			hci_req_add_le_scan_disable(req, false);
 		}
 
 		ret = true;
 	} else {
 		/* Passive scanning */
 		if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
-			hci_req_add_le_scan_disable(req);
+			hci_req_add_le_scan_disable(req, false);
 			ret = true;
 		}
 	}

net/bluetooth/hci_request.h

@@ -65,11 +65,12 @@ void __hci_req_write_fast_connectable(struct hci_request *req, bool enable);
 void __hci_req_update_name(struct hci_request *req);
 void __hci_req_update_eir(struct hci_request *req);
 
-void hci_req_add_le_scan_disable(struct hci_request *req);
+void hci_req_add_le_scan_disable(struct hci_request *req, bool rpa_le_conn);
 void hci_req_add_le_passive_scan(struct hci_request *req);
 
 void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next);
 
+void hci_req_disable_address_resolution(struct hci_dev *hdev);
 void hci_req_reenable_advertising(struct hci_dev *hdev);
 void __hci_req_enable_advertising(struct hci_request *req);
 void __hci_req_disable_advertising(struct hci_request *req);

net/bluetooth/mgmt.c

@@ -5226,7 +5226,7 @@ static int set_scan_params(struct sock *sk, struct hci_dev *hdev,
 
 		hci_req_init(&req, hdev);
 
-		hci_req_add_le_scan_disable(&req);
+		hci_req_add_le_scan_disable(&req, false);
 		hci_req_add_le_passive_scan(&req);
 
 		hci_req_run(&req, NULL);