1 files changed, 69 insertions, 8 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 129c22a..55a1743 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -367,9 +367,23 @@ static void le_conn_timeout(struct work_struct *work)
 {
 	struct hci_conn *conn = container_of(work, struct hci_conn,
 					     le_conn_timeout.work);
+	struct hci_dev *hdev = conn->hdev;
 
 	BT_DBG("");
 
+	/* We could end up here due to having done directed advertising,
+	 * so clean up the state if necessary. This should however only
+	 * happen with broken hardware or if low duty cycle was used
+	 * (which doesn't have a timeout of its own).
+	 */
+	if (test_bit(HCI_ADVERTISING, &hdev->dev_flags)) {
+		u8 enable = 0x00;
+		hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
+			     &enable);
+		hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
+		return;
+	}
+
 	hci_le_create_connection_cancel(conn);
 }
 
@@ -549,6 +563,11 @@ void hci_le_conn_failed(struct hci_conn *conn, u8 status)
 	 * favor of connection establishment, we should restart it.
 	 */
 	hci_update_background_scan(hdev);
+
+	/* Re-enable advertising in case this was a failed connection
+	 * attempt as a peripheral.
+	 */
+	mgmt_reenable_advertising(hdev);
 }
 
 static void create_le_conn_complete(struct hci_dev *hdev, u8 status)
@@ -609,6 +628,45 @@ static void hci_req_add_le_create_conn(struct hci_request *req,
 	conn->state = BT_CONNECT;
 }
 
+static void hci_req_directed_advertising(struct hci_request *req,
+					 struct hci_conn *conn)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_le_set_adv_param cp;
+	u8 own_addr_type;
+	u8 enable;
+
+	enable = 0x00;
+	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+
+	/* Clear the HCI_ADVERTISING bit temporarily so that the
+	 * hci_update_random_address knows that it's safe to go ahead
+	 * and write a new random address. The flag will be set back on
+	 * as soon as the SET_ADV_ENABLE HCI command completes.
+	 */
+	clear_bit(HCI_ADVERTISING, &hdev->dev_flags);
+
+	/* Set require_privacy to false so that the remote device has a
+	 * chance of identifying us.
+	 */
+	if (hci_update_random_address(req, false, &own_addr_type) < 0)
+		return;
+
+	memset(&cp, 0, sizeof(cp));
+	cp.type = LE_ADV_DIRECT_IND;
+	cp.own_address_type = own_addr_type;
+	cp.direct_addr_type = conn->dst_type;
+	bacpy(&cp.direct_addr, &conn->dst);
+	cp.channel_map = hdev->le_adv_channel_map;
+
+	hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
+
+	enable = 0x01;
+	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+
+	conn->state = BT_CONNECT;
+}
+
 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 				u8 dst_type, u8 sec_level, u8 auth_type)
 {
@@ -618,9 +676,6 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 	struct hci_request req;
 	int err;
 
-	if (test_bit(HCI_ADVERTISING, &hdev->flags))
-		return ERR_PTR(-ENOTSUPP);
-
 	/* Some devices send ATT messages as soon as the physical link is
 	 * established. To be able to handle these ATT messages, the user-
 	 * space first establishes the connection and then starts the pairing
@@ -668,13 +723,20 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 		return ERR_PTR(-ENOMEM);
 
 	conn->dst_type = dst_type;
-
-	conn->out = true;
-	conn->link_mode |= HCI_LM_MASTER;
 	conn->sec_level = BT_SECURITY_LOW;
 	conn->pending_sec_level = sec_level;
 	conn->auth_type = auth_type;
 
+	hci_req_init(&req, hdev);
+
+	if (test_bit(HCI_ADVERTISING, &hdev->dev_flags)) {
+		hci_req_directed_advertising(&req, conn);
+		goto create_conn;
+	}
+
+	conn->out = true;
+	conn->link_mode |= HCI_LM_MASTER;
+
 	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
 	if (params) {
 		conn->le_conn_min_interval = params->conn_min_interval;
@@ -684,8 +746,6 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 		conn->le_conn_max_interval = hdev->le_conn_max_interval;
 	}
 
-	hci_req_init(&req, hdev);
-
 	/* If controller is scanning, we stop it since some controllers are
 	 * not able to scan and connect at the same time. Also set the
 	 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
@@ -699,6 +759,7 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 
 	hci_req_add_le_create_conn(&req, conn);
 
+create_conn:
 	err = hci_req_run(&req, create_le_conn_complete);
 	if (err) {
 		hci_conn_del(conn);