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93 lines
3.8 KiB
93 lines
3.8 KiB
4 months ago
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/*
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* Copyright (C) 2018 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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#ifndef NETD_RESOLV_EVENT_REPORTER_H
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#define NETD_RESOLV_EVENT_REPORTER_H
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#include <set>
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#include <android-base/thread_annotations.h>
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#include "aidl/android/net/metrics/INetdEventListener.h"
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#include "aidl/android/net/resolv/aidl/IDnsResolverUnsolicitedEventListener.h"
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/*
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* This class can be used to get the binder reference to the netd events listener service
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* via stable runtime ABI which is achieved from libbinder_ndk. It also allows that
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* register an event listener.
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*/
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class ResolverEventReporter {
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public:
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ResolverEventReporter(ResolverEventReporter const&) = delete;
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ResolverEventReporter(ResolverEventReporter&&) = delete;
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ResolverEventReporter& operator=(ResolverEventReporter const&) = delete;
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ResolverEventReporter& operator=(ResolverEventReporter&&) = delete;
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using ListenerSet = std::set<std::shared_ptr<aidl::android::net::metrics::INetdEventListener>>;
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using UnsolEventListenerSet = std::set<std::shared_ptr<
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aidl::android::net::resolv::aidl::IDnsResolverUnsolicitedEventListener>>;
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// Get the instance of the singleton ResolverEventReporter.
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static ResolverEventReporter& getInstance();
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// Return the binder from the singleton ResolverEventReporter. This method is threadsafe.
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ListenerSet getListeners() const;
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// Return registered binder services from the singleton ResolverEventReporter. This method is
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// threadsafe.
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UnsolEventListenerSet getUnsolEventListeners() const;
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// Add the binder to the singleton ResolverEventReporter. This method is threadsafe.
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int addListener(
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const std::shared_ptr<aidl::android::net::metrics::INetdEventListener>& listener);
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// Add the binder to the singleton ResolverEventReporter. This method is threadsafe.
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int addUnsolEventListener(
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const std::shared_ptr<
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aidl::android::net::resolv::aidl::IDnsResolverUnsolicitedEventListener>&
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listener);
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private:
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ResolverEventReporter() = default;
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~ResolverEventReporter() = default;
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void addDefaultListener() EXCLUDES(mMutex);
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int addListenerImpl(
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const std::shared_ptr<aidl::android::net::metrics::INetdEventListener>& listener)
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EXCLUDES(mMutex);
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int addListenerImplLocked(
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const std::shared_ptr<aidl::android::net::metrics::INetdEventListener>& listener)
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REQUIRES(mMutex);
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int addUnsolEventListenerImpl(
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const std::shared_ptr<
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aidl::android::net::resolv::aidl::IDnsResolverUnsolicitedEventListener>&
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listener) EXCLUDES(mMutex);
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int addUnsolEventListenerImplLocked(
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const std::shared_ptr<
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aidl::android::net::resolv::aidl::IDnsResolverUnsolicitedEventListener>&
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listener) REQUIRES(mMutex);
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ListenerSet getListenersImpl() const EXCLUDES(mMutex);
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UnsolEventListenerSet getUnsolEventListenersImpl() const EXCLUDES(mMutex);
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void handleBinderDied(const void* who) EXCLUDES(mMutex);
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void handleUnsolEventBinderDied(const void* who) EXCLUDES(mMutex);
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mutable std::mutex mMutex;
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ListenerSet mListeners GUARDED_BY(mMutex);
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UnsolEventListenerSet mUnsolEventListeners GUARDED_BY(mMutex);
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};
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#endif // NETD_RESOLV_EVENT_REPORTER_H
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