arc: bluetooth: Implement Gatt server request to read/write

components/arc/bluetooth/arc_bluetooth_bridge.h

 // Copyright 2016 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.
 
 #ifndef COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_
 #define COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 25 matching lines @@
     : public ArcService,
       public InstanceHolder<mojom::BluetoothInstance>::Observer,
       public device::BluetoothAdapter::Observer,
       public device::BluetoothAdapterFactory::AdapterCallback,
       public device::BluetoothLocalGattService::Delegate,
       public mojom::BluetoothHost {
  public:
   explicit ArcBluetoothBridge(ArcBridgeService* bridge_service);
   ~ArcBluetoothBridge() override;
 
-  // Overridden from
-  // InstanceHolder<mojom::BluetoothInstance>::Observer:
+  // Overridden from InstanceHolder<mojom::BluetoothInstance>::Observer:
   void OnInstanceReady() override;
 
   void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
 
   // Overridden from device::BluetoothAdadpter::Observer
   void AdapterPresentChanged(device::BluetoothAdapter* adapter,
                              bool present) override;
 
   void AdapterPoweredChanged(device::BluetoothAdapter* adapter,
                              bool powered) override;
@@ skipping 276 matching lines @@
       mojom::BluetoothGattServiceIDPtr service_id,
       mojom::BluetoothGattIDPtr char_id,
       mojom::BluetoothGattIDPtr desc_id) const;
 
   // Propagates the list of paired device to Android.
   void SendCachedPairedDevices() const;
 
   template <class LocalGattAttribute>
   int32_t CreateGattAttributeHandle(LocalGattAttribute* gatt_attr);
 
+  // Common code for OnCharacteristicReadRequest and OnDescriptorReadRequest
+  template <class LocalGattAttribute>
+  void OnGattAttributeReadRequest(const device::BluetoothDevice* device,
+                                  const LocalGattAttribute* gatt_attr,
+                                  int offset,
+                                  const ValueCallback& success_callback,
+                                  const ErrorCallback& error_callback);
+
+  // Common code for OnCharacteristicWriteRequest and OnDescriptorWriteRequest
+  template <class LocalGattAttribute>
+  void OnGattAttributeWriteRequest(const device::BluetoothDevice* device,
+                                   const LocalGattAttribute* gatt_attr,
+                                   const std::vector<uint8_t>& value,
+                                   int offset,
+                                   const base::Closure& success_callback,
+                                   const ErrorCallback& error_callback);
+
   bool CalledOnValidThread();
 
   int32_t next_gatt_server_attribute_handle() {
     return ++gatt_server_attribute_next_handle;
   }
 
   mojo::Binding<mojom::BluetoothHost> binding_;
 
   scoped_refptr<bluez::BluetoothAdapterBlueZ> bluetooth_adapter_;
   scoped_refptr<device::BluetoothAdvertisement> advertisment_;
   std::unique_ptr<device::BluetoothDiscoverySession> discovery_session_;
   std::unordered_map<std::string,
                      std::unique_ptr<device::BluetoothGattNotifySession>>
       notification_session_;
   // Map from android int handle to Chrome (BlueZ) string identifier.
   std::unordered_map<int32_t, std::string> gatt_identifier_;
+  // Map from Chrome (BlueZ) string identifier to android int handle.
+  std::unordered_map<std::string, int32_t> gatt_handle_;
   // Store last GattCharacteristic added to each GattService for GattServer.
   std::unordered_map<int32_t, int32_t> last_characteristic_;
   // Monotonically increasing value to use as handle to give to Android side.
   int32_t gatt_server_attribute_next_handle = 0;
 
   base::ThreadChecker thread_checker_;
 
   // WeakPtrFactory to use for callbacks.
   base::WeakPtrFactory<ArcBluetoothBridge> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcBluetoothBridge);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_BLUETOOTH_ARC_BLUETOOTH_BRIDGE_H_