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/*
* Copyright (C) 2018 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/binder_manager.h>
#include <binder/IServiceManager.h>
#include <binder/LazyServiceRegistrar.h>
#include "ibinder_internal.h"
#include "status_internal.h"
using ::android::defaultServiceManager;
using ::android::IBinder;
using ::android::IServiceManager;
using ::android::sp;
using ::android::status_t;
using ::android::statusToString;
using ::android::String16;
using ::android::String8;
binder_exception_t AServiceManager_addService(AIBinder* binder, const char* instance) {
if (binder == nullptr || instance == nullptr) {
return EX_ILLEGAL_ARGUMENT;
}
sp<IServiceManager> sm = defaultServiceManager();
status_t exception = sm->addService(String16(instance), binder->getBinder());
return PruneException(exception);
}
binder_exception_t AServiceManager_addServiceWithFlags(AIBinder* binder, const char* instance,
const AServiceManager_AddServiceFlag flags) {
if (binder == nullptr || instance == nullptr) {
return EX_ILLEGAL_ARGUMENT;
}
sp<IServiceManager> sm = defaultServiceManager();
bool allowIsolated = flags & AServiceManager_AddServiceFlag::ADD_SERVICE_ALLOW_ISOLATED;
status_t exception = sm->addService(String16(instance), binder->getBinder(), allowIsolated);
return PruneException(exception);
}
AIBinder* AServiceManager_checkService(const char* instance) {
if (instance == nullptr) {
return nullptr;
}
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder = sm->checkService(String16(instance));
sp<AIBinder> ret = ABpBinder::lookupOrCreateFromBinder(binder);
AIBinder_incStrong(ret.get());
return ret.get();
}
AIBinder* AServiceManager_getService(const char* instance) {
if (instance == nullptr) {
return nullptr;
}
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder = sm->getService(String16(instance));
sp<AIBinder> ret = ABpBinder::lookupOrCreateFromBinder(binder);
AIBinder_incStrong(ret.get());
return ret.get();
}
binder_status_t AServiceManager_registerLazyService(AIBinder* binder, const char* instance) {
if (binder == nullptr || instance == nullptr) {
return STATUS_UNEXPECTED_NULL;
}
auto serviceRegistrar = android::binder::LazyServiceRegistrar::getInstance();
status_t status = serviceRegistrar.registerService(binder->getBinder(), instance);
return PruneStatusT(status);
}
AIBinder* AServiceManager_waitForService(const char* instance) {
if (instance == nullptr) {
return nullptr;
}
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binder = sm->waitForService(String16(instance));
sp<AIBinder> ret = ABpBinder::lookupOrCreateFromBinder(binder);
AIBinder_incStrong(ret.get());
return ret.get();
}
typedef void (*AServiceManager_onRegister)(const char* instance, AIBinder* registered,
void* cookie);
struct AServiceManager_NotificationRegistration
: public IServiceManager::LocalRegistrationCallback {
std::mutex m;
const char* instance = nullptr;
void* cookie = nullptr;
AServiceManager_onRegister onRegister = nullptr;
virtual void onServiceRegistration(const String16& smInstance, const sp<IBinder>& binder) {
std::lock_guard<std::mutex> l(m);
if (onRegister == nullptr) return;
LOG_ALWAYS_FATAL_IF(String8(smInstance) != instance, "onServiceRegistration: %s != %s",
String8(smInstance).c_str(), instance);
sp<AIBinder> ret = ABpBinder::lookupOrCreateFromBinder(binder);
AIBinder_incStrong(ret.get());
onRegister(instance, ret.get(), cookie);
}
void clear() {
std::lock_guard<std::mutex> l(m);
instance = nullptr;
cookie = nullptr;
onRegister = nullptr;
}
};
__attribute__((warn_unused_result)) AServiceManager_NotificationRegistration*
AServiceManager_registerForServiceNotifications(const char* instance,
AServiceManager_onRegister onRegister,
void* cookie) {
LOG_ALWAYS_FATAL_IF(instance == nullptr, "instance == nullptr");
LOG_ALWAYS_FATAL_IF(onRegister == nullptr, "onRegister == nullptr for %s", instance);
// cookie can be nullptr
auto cb = sp<AServiceManager_NotificationRegistration>::make();
cb->instance = instance;
cb->onRegister = onRegister;
cb->cookie = cookie;
sp<IServiceManager> sm = defaultServiceManager();
if (status_t res = sm->registerForNotifications(String16(instance), cb); res != STATUS_OK) {
ALOGE("Failed to register for service notifications for %s: %s", instance,
statusToString(res).c_str());
return nullptr;
}
cb->incStrong(nullptr);
return cb.get();
}
void AServiceManager_NotificationRegistration_delete(
AServiceManager_NotificationRegistration* notification) {
LOG_ALWAYS_FATAL_IF(notification == nullptr, "notification == nullptr");
notification->clear();
notification->decStrong(nullptr);
}
bool AServiceManager_isDeclared(const char* instance) {
if (instance == nullptr) {
return false;
}
sp<IServiceManager> sm = defaultServiceManager();
return sm->isDeclared(String16(instance));
}
void AServiceManager_forEachDeclaredInstance(const char* interface, void* context,
void (*callback)(const char*, void*)) {
LOG_ALWAYS_FATAL_IF(interface == nullptr, "interface == nullptr");
// context may be nullptr
LOG_ALWAYS_FATAL_IF(callback == nullptr, "callback == nullptr");
sp<IServiceManager> sm = defaultServiceManager();
for (const String16& instance : sm->getDeclaredInstances(String16(interface))) {
callback(String8(instance).c_str(), context);
}
}
bool AServiceManager_isUpdatableViaApex(const char* instance) {
if (instance == nullptr) {
return false;
}
sp<IServiceManager> sm = defaultServiceManager();
return sm->updatableViaApex(String16(instance)) != std::nullopt;
}
void AServiceManager_getUpdatableApexName(const char* instance, void* context,
void (*callback)(const char*, void*)) {
LOG_ALWAYS_FATAL_IF(instance == nullptr, "instance == nullptr");
// context may be nullptr
LOG_ALWAYS_FATAL_IF(callback == nullptr, "callback == nullptr");
sp<IServiceManager> sm = defaultServiceManager();
std::optional<String16> updatableViaApex = sm->updatableViaApex(String16(instance));
if (updatableViaApex.has_value()) {
callback(String8(updatableViaApex.value()).c_str(), context);
}
}
void AServiceManager_forceLazyServicesPersist(bool persist) {
auto serviceRegistrar = android::binder::LazyServiceRegistrar::getInstance();
serviceRegistrar.forcePersist(persist);
}
void AServiceManager_setActiveServicesCallback(bool (*callback)(bool, void*), void* context) {
auto serviceRegistrar = android::binder::LazyServiceRegistrar::getInstance();
std::function<bool(bool)> fn = [=](bool hasClients) -> bool {
return callback(hasClients, context);
};
serviceRegistrar.setActiveServicesCallback(fn);
}
bool AServiceManager_tryUnregister() {
auto serviceRegistrar = android::binder::LazyServiceRegistrar::getInstance();
return serviceRegistrar.tryUnregister();
}
void AServiceManager_reRegister() {
auto serviceRegistrar = android::binder::LazyServiceRegistrar::getInstance();
serviceRegistrar.reRegister();
}
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