sdp_state_provider.h

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/*

 *  Copyright 2020 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 PC_SDP_STATE_PROVIDER_H_

#define PC_SDP_STATE_PROVIDER_H_

#include <string>

#include "api/jsep.h"

#include "api/peer_connection_interface.h"

namespace webrtc {

// This interface provides access to the state of an SDP offer/answer

// negotiation.

//

// All the functions are const, so using this interface serves as

// assurance that the user is not modifying the state.

class SdpStateProvider {

 public:

  virtual ~SdpStateProvider() {}

  virtual PeerConnectionInterface::SignalingState signaling_state() const = 0;

  virtual const SessionDescriptionInterface* local_description() const = 0;

  virtual const SessionDescriptionInterface* remote_description() const = 0;

  virtual const SessionDescriptionInterface* current_local_description()

      const = 0;

  virtual const SessionDescriptionInterface* current_remote_description()

      const = 0;

  virtual const SessionDescriptionInterface* pending_local_description()

      const = 0;

  virtual const SessionDescriptionInterface* pending_remote_description()

      const = 0;

  // Whether an ICE restart has been asked for. Used in CreateOffer.

  virtual bool NeedsIceRestart(const std::string& content_name) const = 0;

  // Whether an ICE restart was indicated in the remote offer.

  // Used in CreateAnswer.

  virtual bool IceRestartPending(const std::string& content_name) const = 0;

  virtual absl::optional<rtc::SSLRole> GetDtlsRole(

      const std::string& mid) const = 0;

};

}  // namespace webrtc

#endif  // PC_SDP_STATE_PROVIDER_H_