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/*
* 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);
}
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