| /* |
| * Copyright (C) 2005 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include <binder/Binder.h> |
| |
| #include <assert.h> |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------- |
| |
| class IInterface : public virtual RefBase |
| { |
| public: |
| IInterface(); |
| static sp<IBinder> asBinder(const IInterface*); |
| static sp<IBinder> asBinder(const sp<IInterface>&); |
| |
| protected: |
| virtual ~IInterface(); |
| virtual IBinder* onAsBinder() = 0; |
| }; |
| |
| // ---------------------------------------------------------------------- |
| |
| /** |
| * If this is a local object and the descriptor matches, this will return the |
| * actual local object which is implementing the interface. Otherwise, this will |
| * return a proxy to the interface without checking the interface descriptor. |
| * This means that subsequent calls may fail with BAD_TYPE. |
| */ |
| template<typename INTERFACE> |
| inline sp<INTERFACE> interface_cast(const sp<IBinder>& obj) |
| { |
| return INTERFACE::asInterface(obj); |
| } |
| |
| /** |
| * This is the same as interface_cast, except that it always checks to make sure |
| * the descriptor matches, and if it doesn't match, it will return nullptr. |
| */ |
| template<typename INTERFACE> |
| inline sp<INTERFACE> checked_interface_cast(const sp<IBinder>& obj) |
| { |
| if (obj->getInterfaceDescriptor() != INTERFACE::descriptor) { |
| return nullptr; |
| } |
| |
| return interface_cast<INTERFACE>(obj); |
| } |
| |
| // ---------------------------------------------------------------------- |
| |
| template<typename INTERFACE> |
| class BnInterface : public INTERFACE, public BBinder |
| { |
| public: |
| virtual sp<IInterface> queryLocalInterface(const String16& _descriptor); |
| virtual const String16& getInterfaceDescriptor() const; |
| |
| protected: |
| typedef INTERFACE BaseInterface; |
| virtual IBinder* onAsBinder(); |
| }; |
| |
| // ---------------------------------------------------------------------- |
| |
| template<typename INTERFACE> |
| class BpInterface : public INTERFACE, public BpRefBase |
| { |
| public: |
| explicit BpInterface(const sp<IBinder>& remote); |
| |
| protected: |
| typedef INTERFACE BaseInterface; |
| virtual IBinder* onAsBinder(); |
| }; |
| |
| // ---------------------------------------------------------------------- |
| |
| #define DECLARE_META_INTERFACE(INTERFACE) \ |
| public: \ |
| static const ::android::String16 descriptor; \ |
| static ::android::sp<I##INTERFACE> asInterface( \ |
| const ::android::sp<::android::IBinder>& obj); \ |
| virtual const ::android::String16& getInterfaceDescriptor() const; \ |
| I##INTERFACE(); \ |
| virtual ~I##INTERFACE(); \ |
| static bool setDefaultImpl(std::unique_ptr<I##INTERFACE> impl); \ |
| static const std::unique_ptr<I##INTERFACE>& getDefaultImpl(); \ |
| private: \ |
| static std::unique_ptr<I##INTERFACE> default_impl; \ |
| public: \ |
| |
| |
| #define __IINTF_CONCAT(x, y) (x ## y) |
| |
| #ifndef DO_NOT_CHECK_MANUAL_BINDER_INTERFACES |
| |
| #define IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \ |
| static_assert(internal::allowedManualInterface(NAME), \ |
| "b/64223827: Manually written binder interfaces are " \ |
| "considered error prone and frequently have bugs. " \ |
| "The preferred way to add interfaces is to define " \ |
| "an .aidl file to auto-generate the interface. If " \ |
| "an interface must be manually written, add its " \ |
| "name to the whitelist."); \ |
| DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \ |
| |
| #else |
| |
| #define IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \ |
| DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \ |
| |
| #endif |
| |
| #define DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_INTERFACE(INTERFACE, NAME)\ |
| const ::android::StaticString16 \ |
| I##INTERFACE##_descriptor_static_str16(__IINTF_CONCAT(u, NAME));\ |
| const ::android::String16 I##INTERFACE::descriptor( \ |
| I##INTERFACE##_descriptor_static_str16); \ |
| const ::android::String16& \ |
| I##INTERFACE::getInterfaceDescriptor() const { \ |
| return I##INTERFACE::descriptor; \ |
| } \ |
| ::android::sp<I##INTERFACE> I##INTERFACE::asInterface( \ |
| const ::android::sp<::android::IBinder>& obj) \ |
| { \ |
| ::android::sp<I##INTERFACE> intr; \ |
| if (obj != nullptr) { \ |
| intr = static_cast<I##INTERFACE*>( \ |
| obj->queryLocalInterface( \ |
| I##INTERFACE::descriptor).get()); \ |
| if (intr == nullptr) { \ |
| intr = new Bp##INTERFACE(obj); \ |
| } \ |
| } \ |
| return intr; \ |
| } \ |
| std::unique_ptr<I##INTERFACE> I##INTERFACE::default_impl; \ |
| bool I##INTERFACE::setDefaultImpl(std::unique_ptr<I##INTERFACE> impl)\ |
| { \ |
| /* Only one user of this interface can use this function */ \ |
| /* at a time. This is a heuristic to detect if two different */ \ |
| /* users in the same process use this function. */ \ |
| assert(!I##INTERFACE::default_impl); \ |
| if (impl) { \ |
| I##INTERFACE::default_impl = std::move(impl); \ |
| return true; \ |
| } \ |
| return false; \ |
| } \ |
| const std::unique_ptr<I##INTERFACE>& I##INTERFACE::getDefaultImpl() \ |
| { \ |
| return I##INTERFACE::default_impl; \ |
| } \ |
| I##INTERFACE::I##INTERFACE() { } \ |
| I##INTERFACE::~I##INTERFACE() { } \ |
| |
| |
| #define CHECK_INTERFACE(interface, data, reply) \ |
| do { \ |
| if (!(data).checkInterface(this)) { return PERMISSION_DENIED; } \ |
| } while (false) \ |
| |
| |
| // ---------------------------------------------------------------------- |
| // No user-serviceable parts after this... |
| |
| template<typename INTERFACE> |
| inline sp<IInterface> BnInterface<INTERFACE>::queryLocalInterface( |
| const String16& _descriptor) |
| { |
| if (_descriptor == INTERFACE::descriptor) return this; |
| return nullptr; |
| } |
| |
| template<typename INTERFACE> |
| inline const String16& BnInterface<INTERFACE>::getInterfaceDescriptor() const |
| { |
| return INTERFACE::getInterfaceDescriptor(); |
| } |
| |
| template<typename INTERFACE> |
| IBinder* BnInterface<INTERFACE>::onAsBinder() |
| { |
| return this; |
| } |
| |
| template<typename INTERFACE> |
| inline BpInterface<INTERFACE>::BpInterface(const sp<IBinder>& remote) |
| : BpRefBase(remote) |
| { |
| } |
| |
| template<typename INTERFACE> |
| inline IBinder* BpInterface<INTERFACE>::onAsBinder() |
| { |
| return remote(); |
| } |
| |
| // ---------------------------------------------------------------------- |
| |
| namespace internal { |
| constexpr const char* const kManualInterfaces[] = { |
| "android.app.IActivityManager", |
| "android.app.IUidObserver", |
| "android.drm.IDrm", |
| "android.dvr.IVsyncCallback", |
| "android.dvr.IVsyncService", |
| "android.gfx.tests.ICallback", |
| "android.gfx.tests.IIPCTest", |
| "android.gfx.tests.ISafeInterfaceTest", |
| "android.graphicsenv.IGpuService", |
| "android.gui.DisplayEventConnection", |
| "android.gui.IConsumerListener", |
| "android.gui.IGraphicBufferConsumer", |
| "android.gui.IRegionSamplingListener", |
| "android.gui.ITransactionComposerListener", |
| "android.gui.IScreenCaptureListener", |
| "android.gui.SensorEventConnection", |
| "android.gui.SensorServer", |
| "android.hardware.ICamera", |
| "android.hardware.ICameraClient", |
| "android.hardware.ICameraRecordingProxy", |
| "android.hardware.ICameraRecordingProxyListener", |
| "android.hardware.ICrypto", |
| "android.hardware.IOMXObserver", |
| "android.hardware.ISoundTrigger", |
| "android.hardware.ISoundTriggerClient", |
| "android.hardware.ISoundTriggerHwService", |
| "android.hardware.IStreamListener", |
| "android.hardware.IStreamSource", |
| "android.media.IAudioFlinger", |
| "android.media.IAudioFlingerClient", |
| "android.media.IAudioPolicyService", |
| "android.media.IAudioPolicyServiceClient", |
| "android.media.IAudioService", |
| "android.media.IAudioTrack", |
| "android.media.IDataSource", |
| "android.media.IDrmClient", |
| "android.media.IMediaCodecList", |
| "android.media.IMediaDrmService", |
| "android.media.IMediaExtractor", |
| "android.media.IMediaExtractorService", |
| "android.media.IMediaHTTPConnection", |
| "android.media.IMediaHTTPService", |
| "android.media.IMediaLogService", |
| "android.media.IMediaMetadataRetriever", |
| "android.media.IMediaMetricsService", |
| "android.media.IMediaPlayer", |
| "android.media.IMediaPlayerClient", |
| "android.media.IMediaPlayerService", |
| "android.media.IMediaRecorder", |
| "android.media.IMediaRecorderClient", |
| "android.media.IMediaResourceMonitor", |
| "android.media.IMediaSource", |
| "android.media.IRemoteDisplay", |
| "android.media.IRemoteDisplayClient", |
| "android.media.IResourceManagerClient", |
| "android.media.IResourceManagerService", |
| "android.os.IComplexTypeInterface", |
| "android.os.IPermissionController", |
| "android.os.IPingResponder", |
| "android.os.IProcessInfoService", |
| "android.os.ISchedulingPolicyService", |
| "android.os.IStringConstants", |
| "android.os.storage.IObbActionListener", |
| "android.os.storage.IStorageEventListener", |
| "android.os.storage.IStorageManager", |
| "android.os.storage.IStorageShutdownObserver", |
| "android.service.vr.IPersistentVrStateCallbacks", |
| "android.service.vr.IVrManager", |
| "android.service.vr.IVrStateCallbacks", |
| "android.ui.ISurfaceComposer", |
| "android.ui.ISurfaceComposerClient", |
| "android.utils.IMemory", |
| "android.utils.IMemoryHeap", |
| "com.android.car.procfsinspector.IProcfsInspector", |
| "com.android.internal.app.IAppOpsCallback", |
| "com.android.internal.app.IAppOpsService", |
| "com.android.internal.app.IBatteryStats", |
| "com.android.internal.os.IResultReceiver", |
| "com.android.internal.os.IShellCallback", |
| "drm.IDrmManagerService", |
| "drm.IDrmServiceListener", |
| "IAAudioClient", |
| "IAAudioService", |
| "VtsFuzzer", |
| nullptr, |
| }; |
| |
| constexpr const char* const kDownstreamManualInterfaces[] = { |
| // Add downstream interfaces here. |
| nullptr, |
| }; |
| |
| constexpr bool equals(const char* a, const char* b) { |
| if (*a != *b) return false; |
| if (*a == '\0') return true; |
| return equals(a + 1, b + 1); |
| } |
| |
| constexpr bool inList(const char* a, const char* const* whitelist) { |
| if (*whitelist == nullptr) return false; |
| if (equals(a, *whitelist)) return true; |
| return inList(a, whitelist + 1); |
| } |
| |
| constexpr bool allowedManualInterface(const char* name) { |
| return inList(name, kManualInterfaces) || |
| inList(name, kDownstreamManualInterfaces); |
| } |
| |
| } // namespace internal |
| } // namespace android |