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/*
* Copyright (C) 2013 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 <mutex>
#include <binder/AppOpsManager.h>
#include <binder/Binder.h>
#include <binder/IServiceManager.h>
#include <utils/SystemClock.h>
#include <sys/types.h>
#include <private/android_filesystem_config.h>
#ifdef LOG_TAG
#undef LOG_TAG
#endif
#define LOG_TAG "AppOpsManager"
namespace android {
static const sp<IBinder>& getClientId() {
static pthread_mutex_t gClientIdMutex = PTHREAD_MUTEX_INITIALIZER;
static sp<IBinder> gClientId;
pthread_mutex_lock(&gClientIdMutex);
if (gClientId == nullptr) {
gClientId = sp<BBinder>::make();
}
pthread_mutex_unlock(&gClientIdMutex);
return gClientId;
}
AppOpsManager::AppOpsManager()
{
}
sp<IAppOpsService> AppOpsManager::getService()
{
static String16 _appops("appops");
std::lock_guard<Mutex> scoped_lock(mLock);
int64_t startTime = 0;
sp<IAppOpsService> service = mService;
while (service == nullptr || !IInterface::asBinder(service)->isBinderAlive()) {
sp<IBinder> binder = defaultServiceManager()->checkService(_appops);
if (binder == nullptr) {
// Wait for the app ops service to come back...
if (startTime == 0) {
startTime = uptimeMillis();
ALOGI("Waiting for app ops service");
} else if ((uptimeMillis()-startTime) > 10000) {
ALOGW("Waiting too long for app ops service, giving up");
service = nullptr;
break;
}
sleep(1);
} else {
service = interface_cast<IAppOpsService>(binder);
mService = service;
}
}
return service;
}
int32_t AppOpsManager::checkOp(int32_t op, int32_t uid, const String16& callingPackage)
{
sp<IAppOpsService> service = getService();
return service != nullptr
? service->checkOperation(op, uid, callingPackage)
: AppOpsManager::MODE_IGNORED;
}
int32_t AppOpsManager::checkAudioOpNoThrow(int32_t op, int32_t usage, int32_t uid,
const String16& callingPackage) {
sp<IAppOpsService> service = getService();
return service != nullptr
? service->checkAudioOperation(op, usage, uid, callingPackage)
: AppOpsManager::MODE_IGNORED;
}
int32_t AppOpsManager::noteOp(int32_t op, int32_t uid, const String16& callingPackage) {
return noteOp(op, uid, callingPackage, {},
String16("Legacy AppOpsManager.noteOp call"));
}
int32_t AppOpsManager::noteOp(int32_t op, int32_t uid, const String16& callingPackage,
const std::optional<String16>& attributionTag, const String16& message) {
sp<IAppOpsService> service = getService();
int32_t mode = service != nullptr
? service->noteOperation(op, uid, callingPackage, attributionTag,
shouldCollectNotes(op), message, uid == AID_SYSTEM)
: AppOpsManager::MODE_IGNORED;
return mode;
}
int32_t AppOpsManager::startOpNoThrow(int32_t op, int32_t uid, const String16& callingPackage,
bool startIfModeDefault) {
return startOpNoThrow(op, uid, callingPackage, startIfModeDefault, {},
String16("Legacy AppOpsManager.startOpNoThrow call"));
}
int32_t AppOpsManager::startOpNoThrow(int32_t op, int32_t uid, const String16& callingPackage,
bool startIfModeDefault, const std::optional<String16>& attributionTag,
const String16& message) {
sp<IAppOpsService> service = getService();
int32_t mode = service != nullptr
? service->startOperation(getClientId(), op, uid, callingPackage,
attributionTag, startIfModeDefault, shouldCollectNotes(op), message,
uid == AID_SYSTEM)
: AppOpsManager::MODE_IGNORED;
return mode;
}
void AppOpsManager::finishOp(int32_t op, int32_t uid, const String16& callingPackage) {
finishOp(op, uid, callingPackage, {});
}
void AppOpsManager::finishOp(int32_t op, int32_t uid, const String16& callingPackage,
const std::optional<String16>& attributionTag) {
sp<IAppOpsService> service = getService();
if (service != nullptr) {
service->finishOperation(getClientId(), op, uid, callingPackage, attributionTag);
}
}
void AppOpsManager::startWatchingMode(int32_t op, const String16& packageName,
const sp<IAppOpsCallback>& callback) {
sp<IAppOpsService> service = getService();
if (service != nullptr) {
service->startWatchingMode(op, packageName, callback);
}
}
void AppOpsManager::stopWatchingMode(const sp<IAppOpsCallback>& callback) {
sp<IAppOpsService> service = getService();
if (service != nullptr) {
service->stopWatchingMode(callback);
}
}
int32_t AppOpsManager::permissionToOpCode(const String16& permission) {
sp<IAppOpsService> service = getService();
if (service != nullptr) {
return service->permissionToOpCode(permission);
}
return -1;
}
void AppOpsManager::setCameraAudioRestriction(int32_t mode) {
sp<IAppOpsService> service = getService();
if (service != nullptr) {
service->setCameraAudioRestriction(mode);
}
}
// check it the appops needs to be collected and cache result
bool AppOpsManager::shouldCollectNotes(int32_t opcode) {
// Whether an appop should be collected: 0 == not initialized, 1 == don't note, 2 == note
static uint8_t appOpsToNote[AppOpsManager::_NUM_OP] = {0};
if (appOpsToNote[opcode] == 0) {
if (getService()->shouldCollectNotes(opcode)) {
appOpsToNote[opcode] = 2;
} else {
appOpsToNote[opcode] = 1;
}
}
return appOpsToNote[opcode] == 2;
}
} // namespace android