1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
|
/*
* 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 <binder/Common.h>
#include <assert.h>
namespace android {
// ----------------------------------------------------------------------
class LIBBINDER_EXPORTED 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 LIBBINDER_EXPORTED BnInterface : public INTERFACE, public BBinder {
public:
virtual sp<IInterface> queryLocalInterface(const String16& _descriptor);
virtual const String16& getInterfaceDescriptor() const;
typedef INTERFACE BaseInterface;
protected:
virtual IBinder* onAsBinder();
};
// ----------------------------------------------------------------------
template <typename INTERFACE>
class LIBBINDER_EXPORTED BpInterface : public INTERFACE, public BpRefBase {
public:
explicit BpInterface(const sp<IBinder>& remote);
typedef INTERFACE BaseInterface;
protected:
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(::android::sp<I##INTERFACE> impl); \
static const ::android::sp<I##INTERFACE>& getDefaultImpl(); \
\
private: \
static ::android::sp<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 allowlist."); \
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
// Macro to be used by both IMPLEMENT_META_INTERFACE and IMPLEMENT_META_NESTED_INTERFACE
#define DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_INTERFACE0(ITYPE, INAME, BPTYPE) \
const ::android::String16& ITYPE::getInterfaceDescriptor() const { return ITYPE::descriptor; } \
::android::sp<ITYPE> ITYPE::asInterface(const ::android::sp<::android::IBinder>& obj) { \
::android::sp<ITYPE> intr; \
if (obj != nullptr) { \
intr = ::android::sp<ITYPE>::cast(obj->queryLocalInterface(ITYPE::descriptor)); \
if (intr == nullptr) { \
intr = ::android::sp<BPTYPE>::make(obj); \
} \
} \
return intr; \
} \
::android::sp<ITYPE> ITYPE::default_impl; \
bool ITYPE::setDefaultImpl(::android::sp<ITYPE> 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(!ITYPE::default_impl); \
if (impl) { \
ITYPE::default_impl = std::move(impl); \
return true; \
} \
return false; \
} \
const ::android::sp<ITYPE>& ITYPE::getDefaultImpl() { return ITYPE::default_impl; } \
ITYPE::INAME() {} \
ITYPE::~INAME() {}
// Macro for an interface type.
#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); \
DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_INTERFACE0(I##INTERFACE, I##INTERFACE, Bp##INTERFACE)
// Macro for "nested" interface type.
// For example,
// class Parent .. { class INested .. { }; };
// DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_NESTED_INTERFACE(Parent, Nested, "Parent.INested")
#define DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_NESTED_INTERFACE(PARENT, INTERFACE, NAME) \
const ::android::String16 PARENT::I##INTERFACE::descriptor(NAME); \
DO_NOT_DIRECTLY_USE_ME_IMPLEMENT_META_INTERFACE0(PARENT::I##INTERFACE, I##INTERFACE, \
PARENT::Bp##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 sp<IInterface>::fromExisting(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.IConsumerListener",
"android.gui.IGraphicBufferConsumer",
"android.gui.ITransactionComposerListener",
"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.IStreamListener",
"android.hardware.IStreamSource",
"android.media.IAudioService",
"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.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* allowlist) {
if (*allowlist == nullptr) return false;
if (equals(a, *allowlist)) return true;
return inList(a, allowlist + 1);
}
constexpr bool allowedManualInterface(const char* name) {
return inList(name, kManualInterfaces) ||
inList(name, kDownstreamManualInterfaces);
}
} // namespace internal
} // namespace android
|
