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79 lines
3.3 KiB
79 lines
3.3 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "EventReporter.h"
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using android::interface_cast;
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using android::net::INetdUnsolicitedEventListener;
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using android::net::metrics::INetdEventListener;
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android::sp<INetdEventListener> EventReporter::getNetdEventListener() {
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std::lock_guard lock(mEventMutex);
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if (mNetdEventListener == nullptr) {
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// Use checkService instead of getService because getService waits for 5 seconds for the
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// service to become available. The DNS resolver inside netd is started much earlier in the
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// boot sequence than the framework DNS listener, and we don't want to delay all DNS lookups
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// for 5 seconds until the DNS listener starts up.
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android::sp<android::IBinder> b = android::defaultServiceManager()->checkService(
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android::String16("netd_listener"));
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mNetdEventListener = interface_cast<INetdEventListener>(b);
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}
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// If the netd listener service is dead, the binder call will just return an error, which should
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// be fine because the only impact is that we can't log netd events. In any case, this should
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// only happen if the system server is going down, which means it will shortly be taking us down
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// with it.
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return mNetdEventListener;
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}
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EventReporter::UnsolListenerMap EventReporter::getNetdUnsolicitedEventListenerMap() const {
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std::lock_guard lock(mUnsolicitedMutex);
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return mUnsolListenerMap;
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}
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void EventReporter::registerUnsolEventListener(
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const android::sp<INetdUnsolicitedEventListener>& listener) {
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std::lock_guard lock(mUnsolicitedMutex);
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// Create the death listener.
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class DeathRecipient : public android::IBinder::DeathRecipient {
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public:
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DeathRecipient(EventReporter* eventReporter,
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android::sp<INetdUnsolicitedEventListener> listener)
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: mEventReporter(eventReporter), mListener(std::move(listener)) {}
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~DeathRecipient() override = default;
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void binderDied(const android::wp<android::IBinder>& /* who */) override {
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mEventReporter->unregisterUnsolEventListener(mListener);
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}
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private:
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EventReporter* mEventReporter;
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android::sp<INetdUnsolicitedEventListener> mListener;
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};
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android::sp<android::IBinder::DeathRecipient> deathRecipient =
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new DeathRecipient(this, listener);
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android::IInterface::asBinder(listener)->linkToDeath(deathRecipient);
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// TODO: Consider to use remote binder address as registering key
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mUnsolListenerMap.insert({listener, deathRecipient});
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}
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void EventReporter::unregisterUnsolEventListener(
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const android::sp<INetdUnsolicitedEventListener>& listener) {
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std::lock_guard lock(mUnsolicitedMutex);
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mUnsolListenerMap.erase(listener);
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}
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