| // Copyright 2014 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. |
| |
| #include "chromeos/dbus/bluetooth_gatt_service_service_provider.h" |
| |
| #include "base/bind.h" |
| #include "base/logging.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/platform_thread.h" |
| #include "chromeos/dbus/dbus_thread_manager.h" |
| #include "chromeos/dbus/fake_bluetooth_gatt_service_service_provider.h" |
| #include "dbus/exported_object.h" |
| #include "dbus/message.h" |
| #include "third_party/cros_system_api/dbus/service_constants.h" |
| |
| namespace chromeos { |
| namespace { |
| const char kErrorInvalidArgs[] = |
| "org.freedesktop.DBus.Error.InvalidArgs"; |
| const char kErrorPropertyReadOnly[] = |
| "org.freedesktop.DBus.Error.PropertyReadOnly"; |
| } // namespace |
| |
| // The BluetoothGattServiceServiceProvider implementation used in production. |
| class BluetoothGattServiceServiceProviderImpl |
| : public BluetoothGattServiceServiceProvider { |
| public: |
| BluetoothGattServiceServiceProviderImpl( |
| dbus::Bus* bus, |
| const dbus::ObjectPath& object_path, |
| const std::string& uuid, |
| const std::vector<dbus::ObjectPath>& includes) |
| : origin_thread_id_(base::PlatformThread::CurrentId()), |
| uuid_(uuid), |
| includes_(includes), |
| bus_(bus), |
| object_path_(object_path), |
| weak_ptr_factory_(this) { |
| VLOG(1) << "Creating Bluetooth GATT service: " << object_path_.value() |
| << " UUID: " << uuid; |
| DCHECK(!uuid_.empty()); |
| DCHECK(object_path_.IsValid()); |
| DCHECK(bus_); |
| |
| exported_object_ = bus_->GetExportedObject(object_path_); |
| |
| exported_object_->ExportMethod( |
| dbus::kDBusPropertiesInterface, |
| dbus::kDBusPropertiesGet, |
| base::Bind(&BluetoothGattServiceServiceProviderImpl::Get, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::Bind(&BluetoothGattServiceServiceProviderImpl::OnExported, |
| weak_ptr_factory_.GetWeakPtr())); |
| |
| exported_object_->ExportMethod( |
| dbus::kDBusPropertiesInterface, |
| dbus::kDBusPropertiesSet, |
| base::Bind(&BluetoothGattServiceServiceProviderImpl::Set, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::Bind(&BluetoothGattServiceServiceProviderImpl::OnExported, |
| weak_ptr_factory_.GetWeakPtr())); |
| |
| exported_object_->ExportMethod( |
| dbus::kDBusPropertiesInterface, |
| dbus::kDBusPropertiesGetAll, |
| base::Bind(&BluetoothGattServiceServiceProviderImpl::GetAll, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::Bind(&BluetoothGattServiceServiceProviderImpl::OnExported, |
| weak_ptr_factory_.GetWeakPtr())); |
| } |
| |
| virtual ~BluetoothGattServiceServiceProviderImpl() { |
| VLOG(1) << "Cleaning up Bluetooth GATT service: " << object_path_.value(); |
| bus_->UnregisterExportedObject(object_path_); |
| } |
| |
| private: |
| // Returns true if the current thread is on the origin thread. |
| bool OnOriginThread() { |
| return base::PlatformThread::CurrentId() == origin_thread_id_; |
| } |
| |
| // Called by dbus:: when the Bluetooth daemon fetches a single property of |
| // the service. |
| void Get(dbus::MethodCall* method_call, |
| dbus::ExportedObject::ResponseSender response_sender) { |
| VLOG(2) << "BluetoothGattServiceServiceProvider::Get: " |
| << object_path_.value(); |
| DCHECK(OnOriginThread()); |
| |
| dbus::MessageReader reader(method_call); |
| |
| std::string interface_name; |
| std::string property_name; |
| if (!reader.PopString(&interface_name) || |
| !reader.PopString(&property_name) || |
| reader.HasMoreData()) { |
| scoped_ptr<dbus::ErrorResponse> error_response = |
| dbus::ErrorResponse::FromMethodCall( |
| method_call, kErrorInvalidArgs, "Expected 'ss'."); |
| response_sender.Run(error_response.PassAs<dbus::Response>()); |
| return; |
| } |
| |
| // Only the GATT service interface is allowed. |
| if (interface_name != |
| bluetooth_gatt_service::kBluetoothGattServiceInterface) { |
| scoped_ptr<dbus::ErrorResponse> error_response = |
| dbus::ErrorResponse::FromMethodCall( |
| method_call, kErrorInvalidArgs, |
| "No such interface: '" + interface_name + "'."); |
| response_sender.Run(error_response.PassAs<dbus::Response>()); |
| return; |
| } |
| |
| // Return error if |property_name| is unknown. |
| if (property_name != bluetooth_gatt_service::kUUIDProperty && |
| property_name != bluetooth_gatt_service::kIncludesProperty) { |
| scoped_ptr<dbus::ErrorResponse> error_response = |
| dbus::ErrorResponse::FromMethodCall( |
| method_call, kErrorInvalidArgs, |
| "No such property: '" + property_name + "'."); |
| response_sender.Run(error_response.PassAs<dbus::Response>()); |
| return; |
| } |
| |
| scoped_ptr<dbus::Response> response = |
| dbus::Response::FromMethodCall(method_call); |
| dbus::MessageWriter writer(response.get()); |
| dbus::MessageWriter variant_writer(NULL); |
| |
| if (property_name == bluetooth_gatt_service::kUUIDProperty) { |
| writer.OpenVariant("s", &variant_writer); |
| variant_writer.AppendString(uuid_); |
| writer.CloseContainer(&variant_writer); |
| } else { |
| writer.OpenVariant("ao", &variant_writer); |
| variant_writer.AppendArrayOfObjectPaths(includes_); |
| writer.CloseContainer(&variant_writer); |
| } |
| |
| response_sender.Run(response.Pass()); |
| } |
| |
| // Called by dbus:: when the Bluetooth daemon sets a single property of the |
| // service. |
| void Set(dbus::MethodCall* method_call, |
| dbus::ExportedObject::ResponseSender response_sender) { |
| VLOG(2) << "BluetoothGattServiceServiceProvider::Set: " |
| << object_path_.value(); |
| DCHECK(OnOriginThread()); |
| |
| // All of the properties on this interface are read-only, so just return |
| // error. |
| scoped_ptr<dbus::ErrorResponse> error_response = |
| dbus::ErrorResponse::FromMethodCall( |
| method_call, kErrorPropertyReadOnly, |
| "All properties are read-only."); |
| response_sender.Run(error_response.PassAs<dbus::Response>()); |
| } |
| |
| // Called by dbus:: when the Bluetooth daemon fetches all properties of the |
| // service. |
| void GetAll(dbus::MethodCall* method_call, |
| dbus::ExportedObject::ResponseSender response_sender) { |
| VLOG(2) << "BluetoothGattServiceServiceProvider::GetAll: " |
| << object_path_.value(); |
| DCHECK(OnOriginThread()); |
| |
| dbus::MessageReader reader(method_call); |
| |
| std::string interface_name; |
| if (!reader.PopString(&interface_name) || reader.HasMoreData()) { |
| scoped_ptr<dbus::ErrorResponse> error_response = |
| dbus::ErrorResponse::FromMethodCall( |
| method_call, kErrorInvalidArgs, "Expected 's'."); |
| response_sender.Run(error_response.PassAs<dbus::Response>()); |
| return; |
| } |
| |
| // Only the GATT service interface is allowed. |
| if (interface_name != |
| bluetooth_gatt_service::kBluetoothGattServiceInterface) { |
| scoped_ptr<dbus::ErrorResponse> error_response = |
| dbus::ErrorResponse::FromMethodCall( |
| method_call, kErrorInvalidArgs, |
| "No such interface: '" + interface_name + "'."); |
| response_sender.Run(error_response.PassAs<dbus::Response>()); |
| return; |
| } |
| |
| scoped_ptr<dbus::Response> response = |
| dbus::Response::FromMethodCall(method_call); |
| dbus::MessageWriter writer(response.get()); |
| dbus::MessageWriter array_writer(NULL); |
| dbus::MessageWriter dict_entry_writer(NULL); |
| dbus::MessageWriter variant_writer(NULL); |
| |
| writer.OpenArray("{sv}", &array_writer); |
| |
| array_writer.OpenDictEntry(&dict_entry_writer); |
| dict_entry_writer.AppendString(bluetooth_gatt_service::kUUIDProperty); |
| dict_entry_writer.AppendVariantOfString(uuid_); |
| array_writer.CloseContainer(&dict_entry_writer); |
| |
| array_writer.OpenDictEntry(&dict_entry_writer); |
| dict_entry_writer.AppendString(bluetooth_gatt_service::kIncludesProperty); |
| dict_entry_writer.OpenVariant("ao", &variant_writer); |
| variant_writer.AppendArrayOfObjectPaths(includes_); |
| dict_entry_writer.CloseContainer(&variant_writer); |
| array_writer.CloseContainer(&dict_entry_writer); |
| |
| writer.CloseContainer(&array_writer); |
| |
| response_sender.Run(response.Pass()); |
| } |
| |
| // Called by dbus:: when a method is exported. |
| void OnExported(const std::string& interface_name, |
| const std::string& method_name, |
| bool success) { |
| LOG_IF(WARNING, !success) << "Failed to export " |
| << interface_name << "." << method_name; |
| } |
| |
| // Origin thread (i.e. the UI thread in production). |
| base::PlatformThreadId origin_thread_id_; |
| |
| // 128-bit service UUID of this object. |
| std::string uuid_; |
| |
| // List of object paths that represent other exported GATT services that are |
| // included from this service. |
| std::vector<dbus::ObjectPath> includes_; |
| |
| // D-Bus bus object is exported on, not owned by this object and must |
| // outlive it. |
| dbus::Bus* bus_; |
| |
| // D-Bus object path of object we are exporting, kept so we can unregister |
| // again in our destructor. |
| dbus::ObjectPath object_path_; |
| |
| // D-Bus object we are exporting, owned by this object. |
| scoped_refptr<dbus::ExportedObject> exported_object_; |
| |
| // Weak pointer factory for generating 'this' pointers that might live longer |
| // than we do. |
| // Note: This should remain the last member so it'll be destroyed and |
| // invalidate its weak pointers before any other members are destroyed. |
| base::WeakPtrFactory<BluetoothGattServiceServiceProviderImpl> |
| weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BluetoothGattServiceServiceProviderImpl); |
| }; |
| |
| BluetoothGattServiceServiceProvider::BluetoothGattServiceServiceProvider() { |
| } |
| |
| BluetoothGattServiceServiceProvider::~BluetoothGattServiceServiceProvider() { |
| } |
| |
| // static |
| BluetoothGattServiceServiceProvider* |
| BluetoothGattServiceServiceProvider::Create( |
| dbus::Bus* bus, |
| const dbus::ObjectPath& object_path, |
| const std::string& uuid, |
| const std::vector<dbus::ObjectPath>& includes) { |
| if (!DBusThreadManager::IsUsingStub(DBusClientBundle::BLUETOOTH)) { |
| return new BluetoothGattServiceServiceProviderImpl( |
| bus, object_path, uuid, includes); |
| } |
| return new FakeBluetoothGattServiceServiceProvider( |
| object_path, uuid, includes); |
| } |
| |
| } // namespace chromeos |