| /* |
| * Copyright (C) 2016 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 "EventReporter.h" |
| |
| using android::interface_cast; |
| using android::net::INetdUnsolicitedEventListener; |
| using android::net::metrics::INetdEventListener; |
| |
| android::sp<INetdEventListener> EventReporter::getNetdEventListener() { |
| std::lock_guard lock(mEventMutex); |
| if (mNetdEventListener == nullptr) { |
| // Use checkService instead of getService because getService waits for 5 seconds for the |
| // service to become available. The DNS resolver inside netd is started much earlier in the |
| // boot sequence than the framework DNS listener, and we don't want to delay all DNS lookups |
| // for 5 seconds until the DNS listener starts up. |
| android::sp<android::IBinder> b = android::defaultServiceManager()->checkService( |
| android::String16("netd_listener")); |
| mNetdEventListener = interface_cast<INetdEventListener>(b); |
| } |
| // If the netd listener service is dead, the binder call will just return an error, which should |
| // be fine because the only impact is that we can't log netd events. In any case, this should |
| // only happen if the system server is going down, which means it will shortly be taking us down |
| // with it. |
| return mNetdEventListener; |
| } |
| |
| EventReporter::UnsolListenerMap EventReporter::getNetdUnsolicitedEventListenerMap() const { |
| std::lock_guard lock(mUnsolicitedMutex); |
| return mUnsolListenerMap; |
| } |
| |
| void EventReporter::registerUnsolEventListener( |
| const android::sp<INetdUnsolicitedEventListener>& listener) { |
| std::lock_guard lock(mUnsolicitedMutex); |
| |
| // Create the death listener. |
| class DeathRecipient : public android::IBinder::DeathRecipient { |
| public: |
| DeathRecipient(EventReporter* eventReporter, |
| android::sp<INetdUnsolicitedEventListener> listener) |
| : mEventReporter(eventReporter), mListener(std::move(listener)) {} |
| ~DeathRecipient() override = default; |
| void binderDied(const android::wp<android::IBinder>& /* who */) override { |
| mEventReporter->unregisterUnsolEventListener(mListener); |
| } |
| |
| private: |
| EventReporter* mEventReporter; |
| android::sp<INetdUnsolicitedEventListener> mListener; |
| }; |
| android::sp<android::IBinder::DeathRecipient> deathRecipient = |
| new DeathRecipient(this, listener); |
| |
| android::IInterface::asBinder(listener)->linkToDeath(deathRecipient); |
| |
| // TODO: Consider to use remote binder address as registering key |
| mUnsolListenerMap.insert({listener, deathRecipient}); |
| } |
| |
| void EventReporter::unregisterUnsolEventListener( |
| const android::sp<INetdUnsolicitedEventListener>& listener) { |
| std::lock_guard lock(mUnsolicitedMutex); |
| mUnsolListenerMap.erase(listener); |
| } |