Bluetooth: Add support connectable advertising setting

The patch adds a second advertising setting that allows switching of the
controller into connectable mode independent of the global connectable
setting.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

include/net/bluetooth/hci.h

@@ -217,6 +217,7 @@ enum {
 	HCI_HS_ENABLED,
 	HCI_LE_ENABLED,
 	HCI_ADVERTISING,
+	HCI_ADVERTISING_CONNECTABLE,
 	HCI_CONNECTABLE,
 	HCI_DISCOVERABLE,
 	HCI_LIMITED_DISCOVERABLE,

net/bluetooth/mgmt.c

@@ -1110,6 +1110,9 @@ static void enable_advertising(struct hci_request *req)
 	 */
 	clear_bit(HCI_LE_ADV, &hdev->dev_flags);
 
+	if (test_bit(HCI_ADVERTISING_CONNECTABLE, &hdev->dev_flags))
+		connectable = true;
+	else
 		connectable = get_connectable(hdev);
 
 	/* Set require_privacy to true only when non-connectable
@@ -4430,7 +4433,7 @@ static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
 	struct mgmt_mode *cp = data;
 	struct mgmt_pending_cmd *cmd;
 	struct hci_request req;
-	u8 val, enabled, status;
+	u8 val, status;
 	int err;
 
 	BT_DBG("request for %s", hdev->name);
@@ -4440,29 +4443,42 @@ static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
 		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
 				       status);
 
-	if (cp->val != 0x00 && cp->val != 0x01)
+	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
 		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
 				       MGMT_STATUS_INVALID_PARAMS);
 
 	hci_dev_lock(hdev);
 
 	val = !!cp->val;
-	enabled = test_bit(HCI_ADVERTISING, &hdev->dev_flags);
 
 	/* The following conditions are ones which mean that we should
 	 * not do any HCI communication but directly send a mgmt
 	 * response to user space (after toggling the flag if
 	 * necessary).
 	 */
-	if (!hdev_is_powered(hdev) || val == enabled ||
+	if (!hdev_is_powered(hdev) ||
+	    (val == test_bit(HCI_ADVERTISING, &hdev->dev_flags) &&
+	     (cp->val == 0x02) == test_bit(HCI_ADVERTISING_CONNECTABLE,
+					   &hdev->dev_flags)) ||
 	    hci_conn_num(hdev, LE_LINK) > 0 ||
 	    (test_bit(HCI_LE_SCAN, &hdev->dev_flags) &&
 	     hdev->le_scan_type == LE_SCAN_ACTIVE)) {
-		bool changed = false;
+		bool changed;
 
-		if (val != test_bit(HCI_ADVERTISING, &hdev->dev_flags)) {
-			change_bit(HCI_ADVERTISING, &hdev->dev_flags);
-			changed = true;
+		if (cp->val) {
+			changed = !test_and_set_bit(HCI_ADVERTISING,
+						    &hdev->dev_flags);
+			if (cp->val == 0x02)
+				set_bit(HCI_ADVERTISING_CONNECTABLE,
+					&hdev->dev_flags);
+			else
+				clear_bit(HCI_ADVERTISING_CONNECTABLE,
+					  &hdev->dev_flags);
+		} else {
+			changed = test_and_clear_bit(HCI_ADVERTISING,
+						     &hdev->dev_flags);
+			clear_bit(HCI_ADVERTISING_CONNECTABLE,
+				  &hdev->dev_flags);
 		}
 
 		err = send_settings_rsp(sk, MGMT_OP_SET_ADVERTISING, hdev);
@@ -4490,6 +4506,11 @@ static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
 
 	hci_req_init(&req, hdev);
 
+	if (cp->val == 0x02)
+		set_bit(HCI_ADVERTISING_CONNECTABLE, &hdev->dev_flags);
+	else
+		clear_bit(HCI_ADVERTISING_CONNECTABLE, &hdev->dev_flags);
+
 	if (val)
 		enable_advertising(&req);
 	else