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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
#define NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
#include <memory>
#include "base/android/jni_android.h"
#include "base/compiler_specific.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "net/android/network_change_notifier_delegate_android.h"
#include "net/base/net_export.h"
#include "net/base/network_change_notifier.h"
#include "net/base/network_handle.h"
namespace base {
struct OnTaskRunnerDeleter;
} // namespace base
namespace net {
class NetworkChangeNotifierAndroidTest;
class NetworkChangeNotifierFactoryAndroid;
// NetworkChangeNotifierAndroid observes network events from the Android
// notification system and forwards them to observers.
//
// The implementation is complicated by the differing lifetime and thread
// affinity requirements of Android notifications and of NetworkChangeNotifier.
//
// High-level overview:
// NetworkChangeNotifier.java - Receives notifications from Android system, and
// notifies native code via JNI (on the main application thread).
// NetworkChangeNotifierDelegateAndroid ('Delegate') - Listens for notifications
// sent via JNI on the main application thread, and forwards them to observers
// on their threads. Owned by Factory, lives exclusively on main application
// thread.
// NetworkChangeNotifierFactoryAndroid ('Factory') - Creates the Delegate on the
// main thread to receive JNI events, and vends Notifiers. Lives exclusively
// on main application thread, and outlives all other classes.
// NetworkChangeNotifierAndroid ('Notifier') - Receives event notifications from
// the Delegate. Processes and forwards these events to the
// NetworkChangeNotifier observers on their threads. May live on any thread
// and be called by any thread.
//
// For more details, see the implementation file.
//
// Note: Alongside of NetworkChangeNotifier.java there is
// NetworkActiveNotifier.java, which handles notifications for when the system
// default network goes in to a high power state. These are handled separately
// since listening to them is expensive (they are fired often) and currently
// only bidi streams connection status check uses them.
class NET_EXPORT_PRIVATE NetworkChangeNotifierAndroid
: public NetworkChangeNotifier,
public NetworkChangeNotifierDelegateAndroid::Observer {
public:
NetworkChangeNotifierAndroid(const NetworkChangeNotifierAndroid&) = delete;
NetworkChangeNotifierAndroid& operator=(const NetworkChangeNotifierAndroid&) =
delete;
~NetworkChangeNotifierAndroid() override;
// NetworkChangeNotifier:
ConnectionType GetCurrentConnectionType() const override;
ConnectionCost GetCurrentConnectionCost() override;
// Requires ACCESS_WIFI_STATE permission in order to provide precise WiFi link
// speed.
void GetCurrentMaxBandwidthAndConnectionType(
double* max_bandwidth_mbps,
ConnectionType* connection_type) const override;
bool AreNetworkHandlesCurrentlySupported() const override;
void GetCurrentConnectedNetworks(NetworkList* network_list) const override;
ConnectionType GetCurrentNetworkConnectionType(
handles::NetworkHandle network) const override;
NetworkChangeNotifier::ConnectionSubtype GetCurrentConnectionSubtype()
const override;
handles::NetworkHandle GetCurrentDefaultNetwork() const override;
bool IsDefaultNetworkActiveInternal() override;
// NetworkChangeNotifierDelegateAndroid::Observer:
void OnConnectionTypeChanged() override;
void OnConnectionCostChanged() override;
void OnMaxBandwidthChanged(double max_bandwidth_mbps,
ConnectionType type) override;
void OnNetworkConnected(handles::NetworkHandle network) override;
void OnNetworkSoonToDisconnect(handles::NetworkHandle network) override;
void OnNetworkDisconnected(handles::NetworkHandle network) override;
void OnNetworkMadeDefault(handles::NetworkHandle network) override;
void OnDefaultNetworkActive() override;
// Promote GetMaxBandwidthMbpsForConnectionSubtype to public for the Android
// delegate class.
using NetworkChangeNotifier::GetMaxBandwidthMbpsForConnectionSubtype;
static NetworkChangeCalculatorParams NetworkChangeCalculatorParamsAndroid();
void DefaultNetworkActiveObserverAdded() override;
void DefaultNetworkActiveObserverRemoved() override;
private:
friend class NetworkChangeNotifierAndroidTest;
friend class NetworkChangeNotifierFactoryAndroid;
class BlockingThreadObjects;
// Enable handles::NetworkHandles support for tests.
void ForceNetworkHandlesSupportedForTesting();
explicit NetworkChangeNotifierAndroid(
NetworkChangeNotifierDelegateAndroid* delegate);
const raw_ptr<NetworkChangeNotifierDelegateAndroid> delegate_;
// A collection of objects that must live on blocking sequences. These objects
// listen for notifications and relay the notifications to the registered
// observers without posting back to the thread the object was created on.
// Also used for DnsConfigService which also must live on blocking sequences.
std::unique_ptr<BlockingThreadObjects, base::OnTaskRunnerDeleter>
blocking_thread_objects_;
bool force_network_handles_supported_for_testing_ = false;
};
} // namespace net
#endif // NET_ANDROID_NETWORK_CHANGE_NOTIFIER_ANDROID_H_
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