Bluetooth: Add white list lookup for incoming connection requests

This patch adds support for looking up entries in the white list when
HCI_CONNECTABLE is not set. The logic is fairly simple: if we're
connectable check the black list, if we're not connectable check the
white list.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_event.c

@@ -2149,11 +2149,19 @@ static void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		return;
 	}
 
-	if (!hci_bdaddr_list_lookup(&hdev->blacklist, &ev->bdaddr,
+	if (test_bit(HCI_CONNECTABLE, &hdev->dev_flags)) {
+		if (hci_bdaddr_list_lookup(&hdev->blacklist, &ev->bdaddr,
 					   BDADDR_BREDR)) {
 			hci_reject_conn(hdev, &ev->bdaddr);
 			return;
 		}
+	} else {
+		if (!hci_bdaddr_list_lookup(&hdev->whitelist, &ev->bdaddr,
+					    BDADDR_BREDR)) {
+			hci_reject_conn(hdev, &ev->bdaddr);
+			return;
+		}
+	}
 
 	/* Connection accepted */