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
|
/*
* Copyright (C) 2023 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.
*/
#include <android/content/pm/IPackageManagerNative.h>
#include "AudioRecordClient.h"
#include "AudioPolicyService.h"
#include "binder/AppOpsManager.h"
#include "mediautils/ServiceUtilities.h"
#include <algorithm>
namespace android::media::audiopolicy {
using android::AudioPolicyService;
namespace {
bool isAppOpSource(audio_source_t source) {
switch (source) {
case AUDIO_SOURCE_FM_TUNER:
case AUDIO_SOURCE_ECHO_REFERENCE:
case AUDIO_SOURCE_REMOTE_SUBMIX:
return false;
default:
break;
}
return true;
}
int getTargetSdkForPackageName(std::string_view packageName) {
const auto binder = defaultServiceManager()->checkService(String16{"package_native"});
int targetSdk = -1;
if (binder != nullptr) {
const auto pm = interface_cast<content::pm::IPackageManagerNative>(binder);
if (pm != nullptr) {
const auto status = pm->getTargetSdkVersionForPackage(
String16{packageName.data(), packageName.size()}, &targetSdk);
return status.isOk() ? targetSdk : __ANDROID_API_FUTURE__;
}
}
return targetSdk;
}
bool doesPackageTargetAtLeastU(std::string_view packageName) {
constexpr int ANDROID_API_U = 34;
return getTargetSdkForPackageName(packageName) >= ANDROID_API_U;
}
class AttrSourceItr {
public:
using iterator_category = std::forward_iterator_tag;
using difference_type = std::ptrdiff_t;
using value_type = AttributionSourceState;
using pointer = const value_type*;
using reference = const value_type&;
AttrSourceItr() : mAttr(nullptr) {}
AttrSourceItr(const AttributionSourceState& attr) : mAttr(&attr) {}
reference operator*() const { return *mAttr; }
pointer operator->() const { return mAttr; }
AttrSourceItr& operator++() {
mAttr = !mAttr->next.empty() ? mAttr->next.data() : nullptr;
return *this;
}
AttrSourceItr operator++(int) {
AttrSourceItr tmp = *this;
++(*this);
return tmp;
}
friend bool operator==(const AttrSourceItr& a, const AttrSourceItr& b) {
return a.mAttr == b.mAttr;
}
friend bool operator!=(const AttrSourceItr& a, const AttrSourceItr& b) {
return !operator==(a, b);
}
static AttrSourceItr end() { return AttrSourceItr{}; }
private:
const AttributionSourceState * mAttr;
};
} // anonymous
// static
sp<OpRecordAudioMonitor>
OpRecordAudioMonitor::createIfNeeded(
const AttributionSourceState& attributionSource, const audio_attributes_t& attr,
wp<AudioPolicyService::AudioCommandThread> commandThread)
{
if (isAudioServerOrRootUid(attributionSource.uid)) {
ALOGV("not silencing record for audio or root source %s",
attributionSource.toString().c_str());
return nullptr;
}
if (!isAppOpSource(attr.source)) {
ALOGD("not monitoring app op for uid %d and source %d",
attributionSource.uid, attr.source);
return nullptr;
}
if (!attributionSource.packageName.has_value()
|| attributionSource.packageName.value().size() == 0) {
return nullptr;
}
return new OpRecordAudioMonitor(attributionSource, getOpForSource(attr.source),
isRecordOpRequired(attr.source),
commandThread);
}
OpRecordAudioMonitor::OpRecordAudioMonitor(const AttributionSourceState& attributionSource,
int32_t appOp, bool shouldMonitorRecord,
wp<AudioPolicyService::AudioCommandThread> commandThread)
: mHasOp(true),
mAttributionSource(attributionSource),
mAppOp(appOp),
mShouldMonitorRecord(shouldMonitorRecord),
mCommandThread(commandThread) {}
OpRecordAudioMonitor::~OpRecordAudioMonitor()
{
if (mOpCallback != 0) {
mAppOpsManager.stopWatchingMode(mOpCallback);
}
mOpCallback.clear();
}
void OpRecordAudioMonitor::onFirstRef()
{
checkOp();
mOpCallback = new RecordAudioOpCallback(this);
ALOGV("start watching op %d for %s", mAppOp, mAttributionSource.toString().c_str());
int flags = doesPackageTargetAtLeastU(mAttributionSource.packageName.value_or(""))
? AppOpsManager::WATCH_FOREGROUND_CHANGES
: 0;
const auto reg = [&](int32_t op) {
std::for_each(AttrSourceItr{mAttributionSource}, AttrSourceItr::end(),
[&](const auto& attr) {
mAppOpsManager.startWatchingMode(
op,
VALUE_OR_FATAL(aidl2legacy_string_view_String16(
attr.packageName.value_or(""))),
flags, mOpCallback);
});
};
reg(mAppOp);
if (mAppOp != AppOpsManager::OP_RECORD_AUDIO && mShouldMonitorRecord) {
reg(AppOpsManager::OP_RECORD_AUDIO);
}
}
bool OpRecordAudioMonitor::hasOp() const {
return mHasOp.load();
}
// Called by RecordAudioOpCallback when the app op corresponding to this OpRecordAudioMonitor
// is updated in AppOp callback and in onFirstRef()
// Note this method is never called (and never to be) for audio server / root track
// due to the UID in createIfNeeded(). As a result for those record track, it's:
// - not called from constructor,
// - not called from RecordAudioOpCallback because the callback is not installed in this case
void OpRecordAudioMonitor::checkOp(bool updateUidStates) {
const auto check = [&](int32_t op) -> bool {
return std::all_of(
AttrSourceItr{mAttributionSource}, AttrSourceItr::end(), [&](const auto& x) {
return mAppOpsManager.checkOp(op, x.uid,
VALUE_OR_FATAL(aidl2legacy_string_view_String16(
x.packageName.value_or("")))) ==
AppOpsManager::MODE_ALLOWED;
});
};
bool hasIt = check(mAppOp);
if (mAppOp != AppOpsManager::OP_RECORD_AUDIO && mShouldMonitorRecord) {
hasIt = hasIt && check(AppOpsManager::OP_RECORD_AUDIO);
}
// verbose logging only log when appOp changed
ALOGI_IF(hasIt != mHasOp.load(),
"App op %d missing, %ssilencing record %s",
mAppOp, hasIt ? "un" : "", mAttributionSource.toString().c_str());
mHasOp.store(hasIt);
if (updateUidStates) {
sp<AudioPolicyService::AudioCommandThread> commandThread = mCommandThread.promote();
if (commandThread != nullptr) {
commandThread->updateUidStatesCommand();
}
}
}
OpRecordAudioMonitor::RecordAudioOpCallback::RecordAudioOpCallback(
const wp<OpRecordAudioMonitor>& monitor) : mMonitor(monitor)
{ }
void OpRecordAudioMonitor::RecordAudioOpCallback::opChanged(int32_t op,
const String16& packageName __unused) {
sp<OpRecordAudioMonitor> monitor = mMonitor.promote();
if (monitor != NULL) {
if (op != monitor->getOp()) {
return;
}
monitor->checkOp(true);
}
}
} // namespace android::media::audiopolicy
|
