blob: ed4464db5570f7b38ef11a2122b301a7b5e9bcec [file] [log] [blame]
* Copyright 2015 The WebRTC Project Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include "rtc_base/network_constants.h"
#include "rtc_base/third_party/sigslot/sigslot.h"
#include "rtc_base/thread.h"
namespace rtc {
class IPAddress;
enum class NetworkBindingResult {
SUCCESS = 0, // No error
FAILURE = -1, // Generic error
class NetworkBinderInterface {
// Binds a socket to the network that is attached to |address| so that all
// packets on the socket |socket_fd| will be sent via that network.
// This is needed because some operating systems (like Android) require a
// special bind call to put packets on a non-default network interface.
virtual NetworkBindingResult BindSocketToNetwork(
int socket_fd,
const IPAddress& address) = 0;
virtual ~NetworkBinderInterface() {}
* Receives network-change events via |OnNetworksChanged| and signals the
* networks changed event.
* Threading consideration:
* It is expected that all upstream operations (from native to Java) are
* performed from the worker thread. This includes creating, starting and
* stopping the monitor. This avoids the potential race condition when creating
* the singleton Java NetworkMonitor class. Downstream operations can be from
* any thread, but this class will forward all the downstream operations onto
* the worker thread.
* Memory consideration:
* NetworkMonitor is owned by the caller (NetworkManager). The global network
* monitor factory is owned by the factory itself but needs to be released from
* the factory creator.
// Generic network monitor interface. It starts and stops monitoring network
// changes, and fires the SignalNetworksChanged event when networks change.
class NetworkMonitorInterface {
virtual ~NetworkMonitorInterface();
sigslot::signal0<> SignalNetworksChanged;
virtual void Start() = 0;
virtual void Stop() = 0;
// Implementations should call this method on the base when networks change,
// and the base will fire SignalNetworksChanged on the right thread.
virtual void OnNetworksChanged() = 0;
virtual AdapterType GetAdapterType(const std::string& interface_name) = 0;
virtual AdapterType GetVpnUnderlyingAdapterType(
const std::string& interface_name) = 0;
class NetworkMonitorBase : public NetworkMonitorInterface,
public MessageHandler,
public sigslot::has_slots<> {
~NetworkMonitorBase() override;
void OnNetworksChanged() override;
void OnMessage(Message* msg) override;
AdapterType GetVpnUnderlyingAdapterType(
const std::string& interface_name) override;
Thread* worker_thread() { return worker_thread_; }
Thread* worker_thread_;
* NetworkMonitorFactory creates NetworkMonitors.
class NetworkMonitorFactory {
// This is not thread-safe; it should be called once (or once per audio/video
// call) during the call initialization.
static void SetFactory(NetworkMonitorFactory* factory);
static void ReleaseFactory(NetworkMonitorFactory* factory);
static NetworkMonitorFactory* GetFactory();
virtual NetworkMonitorInterface* CreateNetworkMonitor() = 0;
virtual ~NetworkMonitorFactory();
} // namespace rtc