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