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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_ICE_AGENT_INTERFACE_H_
#define P2P_BASE_ICE_AGENT_INTERFACE_H_
#include "api/array_view.h"
#include "p2p/base/connection.h"
#include "p2p/base/ice_switch_reason.h"
namespace cricket {
// IceAgentInterface provides methods that allow an ICE controller to manipulate
// the connections available to a transport, and used by the transport to
// transfer data.
class IceAgentInterface {
public:
virtual ~IceAgentInterface() = default;
// Get the time when the last ping was sent.
// This is only needed in some scenarios if the agent decides to ping on its
// own, eg. in some switchover scenarios. Otherwise the ICE controller could
// keep this state on its own.
// TODO(bugs.webrtc.org/14367): route extra pings through the ICE controller.
virtual int64_t GetLastPingSentMs() const = 0;
// Get the ICE role of this ICE agent.
virtual IceRole GetIceRole() const = 0;
// Called when a pingable connection first becomes available.
virtual void OnStartedPinging() = 0;
// Update the state of all available connections.
virtual void UpdateConnectionStates() = 0;
// Update the internal state of the ICE agent. An ICE controller should call
// this at the end of a sequence of actions to combine several mutations into
// a single state refresh.
// TODO(bugs.webrtc.org/14431): ICE agent state updates should be internal to
// the agent. If batching is necessary, use a more appropriate interface.
virtual void UpdateState() = 0;
// Reset the given connections to a state of newly connected connections.
// - STATE_WRITE_INIT
// - receving = false
// - throw away all pending request
// - reset RttEstimate
//
// Keep the following unchanged:
// - connected
// - remote_candidate
// - statistics
//
// SignalStateChange will not be triggered.
virtual void ForgetLearnedStateForConnections(
rtc::ArrayView<const Connection* const> connections) = 0;
// Send a STUN ping request for the given connection.
virtual void SendPingRequest(const Connection* connection) = 0;
// Switch the transport to use the given connection.
virtual void SwitchSelectedConnection(const Connection* new_connection,
IceSwitchReason reason) = 0;
// Prune away the given connections. Returns true if pruning is permitted and
// successfully performed.
virtual bool PruneConnections(
rtc::ArrayView<const Connection* const> connections) = 0;
};
} // namespace cricket
#endif // P2P_BASE_ICE_AGENT_INTERFACE_H_
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