Avoid bluetoothd and QtBluetooth collision when connecting to BTLE dev

BlueZ's improving support for BTLE creates a new collision when
attenpting to connect to remote BTLE devices. There can only ever be
one connection.

This patch ensures that when QtBluetooth attempts to connect we do
not have a pending BTLE connection. This could have been caused via
other QtBLuetooth based processes or applications
such as bluetoothctl or bluetoothd in general. If a connection
is pending we close the connection external to the current QtBLuetooth
instance.

This is not an ideal situation as several processes can potentially
fight over btle access. The long term solution is a port of QtBluetooth
to BlueZ's new DBus API.

Task-number: QTBUG-55150
Change-Id: I96b30ae180d1348027e8f9f09c997f44409dfc48
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/bluetooth/qlowenergycontroller_p.h b/src/bluetooth/qlowenergycontroller_p.h
index 5fcc46a4..5811376b 100644
--- a/src/bluetooth/qlowenergycontroller_p.h
+++ b/src/bluetooth/qlowenergycontroller_p.h
@@ -100,6 +100,7 @@ class QTimer;
 class HciManager;
 class LeCmacCalculator;
 class QSocketNotifier;
+class RemoteDeviceManager;
 #elif defined(QT_ANDROID_BLUETOOTH)
 class LowEnergyNotificationHub;
 #endif
@@ -279,6 +280,7 @@ private:
     QLeAdvertiser *advertiser;
     QSocketNotifier *serverSocketNotifier;
     QTimer *requestTimer = nullptr;
+    RemoteDeviceManager* device1Manager = nullptr;
 
     /*
       Defines the maximum number of milliseconds the implementation will
@@ -413,6 +415,7 @@ private:
             const QByteArray &newValue);
 
     void restartRequestTimer();
+    void establishL2cpClientSocket();
 
 private slots:
     void l2cpConnected();
@@ -421,6 +424,7 @@ private slots:
     void l2cpReadyRead();
     void encryptionChangedEvent(const QBluetoothAddress&, bool);
     void handleGattRequestTimeout();
+    void activeConnectionTerminationDone();
 #elif defined(QT_ANDROID_BLUETOOTH)
     LowEnergyNotificationHub *hub;