bluetooth: Implement simulateGATTConnectionResponse()

device/bluetooth/public/interfaces/test/fake_bluetooth.mojom

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module bluetooth.mojom;
 
 import "device/bluetooth/public/interfaces/uuid.mojom";
 
 // FakeBluetooth and its related interfaces allow clients to control the global
 // Bluetooth State as well as simulate Bluetooth events including finding new
@@ skipping 12 matching lines @@
   // Set it to indicate whether the platform supports BLE. For example, Windows
   // 7 is a platform that doesn't support Low Energy. On the other hand Windows
   // 10 is a platform that does support LE, even if there is no Bluetooth radio
   // available.
   SetLESupported(bool available) => ();
 
   // Initializes a fake Central with |state| as the initial state.
   SimulateCentral(CentralState state) => (FakeCentral fake_central);
 };
 
+// HCI Error Codes from BT 4.2 Vol 2 Part D 1.3 List Of Error Codes.
+const uint16 kHCISuccess = 0x0000;
+const uint16 kHCIConnectionTimeout = 0x0008;
+
 // FakeCentral allows clients to simulate events that a device in the
 // Central/Observer role would receive as well as monitor the operations
 // performed by the device in the Central/Observer role.
 //
 // A "Central" interface would allow its clients to receive advertising events
 // and initiate connections to peripherals i.e. operations of two roles
 // defined by the Bluetooth Spec: Observer and Central.
 // See Bluetooth 4.2 Vol 3 Part C 2.2.2 "Roles when Operating over an
 // LE Physical Transport".
 interface FakeCentral {
   // Simulates a peripheral with |address|, |name| and |known_service_uuids|
   // that has already been connected to the system. If the peripheral existed
   // already it updates its name and known UUIDs.
   //
   // Platforms offer methods to retrieve devices that have already been
   // connected to the system or weren't connected through the UA e.g. a user
   // connected a peripheral through the system's settings. This method is
   // intended to simulate peripherals that those methods would return.
+  // Even though these devices are already connected to the OS, clients
+  // need to call the respective connect functions to signal they intend to keep
+  // the connection alive.
   SimulatePreconnectedPeripheral(string address,
                                  string name,
                                  array<UUID> known_service_uuids) => ();
+
+  // Sets the next GATT Connection request response for peripheral with
+  // |address| to |code|. |code| could be an HCI Error Code from
+  // BT 4.2 Vol 2 Part D 1.3 List Of Error Codes or a number outside that range
+  // returned by specific platforms e.g. Android returns 0x101 to signal a GATT
+  // failure
+  // https://developer.android.com/reference/android/bluetooth/BluetoothGatt.html#GATT_FAILURE
+  // Calls callback with false if there was any error when simulating the next
+  // response.
+  SetNextGATTConnectionResponse(string address, uint16 code) => (bool success);
 };