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/*
* Copyright 2022 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.
*/
#ifndef P2P_BASE_WRAPPING_ACTIVE_ICE_CONTROLLER_H_
#define P2P_BASE_WRAPPING_ACTIVE_ICE_CONTROLLER_H_
#include <memory>
#include "absl/types/optional.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "p2p/base/active_ice_controller_interface.h"
#include "p2p/base/connection.h"
#include "p2p/base/ice_agent_interface.h"
#include "p2p/base/ice_controller_factory_interface.h"
#include "p2p/base/ice_controller_interface.h"
#include "p2p/base/ice_switch_reason.h"
#include "p2p/base/ice_transport_internal.h"
#include "p2p/base/transport_description.h"
#include "rtc_base/thread.h"
#include "rtc_base/thread_annotations.h"
namespace cricket {
// WrappingActiveIceController provides the functionality of a legacy passive
// ICE controller but packaged as an active ICE Controller.
class WrappingActiveIceController : public ActiveIceControllerInterface {
public:
// Constructs an active ICE controller wrapping an already constructed legacy
// ICE controller. Does not take ownership of the ICE agent, which must
// already exist and outlive the ICE controller.
WrappingActiveIceController(IceAgentInterface* ice_agent,
std::unique_ptr<IceControllerInterface> wrapped);
// Constructs an active ICE controller that wraps over a legacy ICE
// controller. The legacy ICE controller is constructed through a factory, if
// one is supplied. If not, a default BasicIceController is wrapped instead.
// Does not take ownership of the ICE agent, which must already exist and
// outlive the ICE controller.
WrappingActiveIceController(
IceAgentInterface* ice_agent,
IceControllerFactoryInterface* wrapped_factory,
const IceControllerFactoryArgs& wrapped_factory_args);
virtual ~WrappingActiveIceController();
void SetIceConfig(const IceConfig& config) override;
bool GetUseCandidateAttribute(const Connection* connection,
NominationMode mode,
IceMode remote_ice_mode) const override;
void OnConnectionAdded(const Connection* connection) override;
void OnConnectionPinged(const Connection* connection) override;
void OnConnectionUpdated(const Connection* connection) override;
void OnConnectionSwitched(const Connection* connection) override;
void OnConnectionDestroyed(const Connection* connection) override;
void OnSortAndSwitchRequest(IceSwitchReason reason) override;
void OnImmediateSortAndSwitchRequest(IceSwitchReason reason) override;
bool OnImmediateSwitchRequest(IceSwitchReason reason,
const Connection* selected) override;
// Only for unit tests
const Connection* FindNextPingableConnection() override;
private:
void MaybeStartPinging();
void SelectAndPingConnection();
void HandlePingResult(IceControllerInterface::PingResult result);
void SortAndSwitchToBestConnection(IceSwitchReason reason);
void HandleSwitchResult(IceSwitchReason reason_for_switch,
IceControllerInterface::SwitchResult result);
void UpdateStateOnConnectionsResorted();
void PruneConnections();
rtc::Thread* const network_thread_;
webrtc::ScopedTaskSafety task_safety_;
bool started_pinging_ RTC_GUARDED_BY(network_thread_) = false;
bool sort_pending_ RTC_GUARDED_BY(network_thread_) = false;
const Connection* selected_connection_ RTC_GUARDED_BY(network_thread_) =
nullptr;
std::unique_ptr<IceControllerInterface> wrapped_
RTC_GUARDED_BY(network_thread_);
IceAgentInterface& agent_ RTC_GUARDED_BY(network_thread_);
};
} // namespace cricket
#endif // P2P_BASE_WRAPPING_ACTIVE_ICE_CONTROLLER_H_
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