webrtc/p2p/base/transportdescriptionfactory.h

/*
 *  Copyright 2012 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 WEBRTC_P2P_BASE_TRANSPORTDESCRIPTIONFACTORY_H_
#define WEBRTC_P2P_BASE_TRANSPORTDESCRIPTIONFACTORY_H_

#include "webrtc/base/rtccertificate.h"
#include "webrtc/p2p/base/transportdescription.h"

namespace rtc {
class SSLIdentity;
}

namespace cricket {

struct TransportOptions {
  TransportOptions() : ice_restart(false), prefer_passive_role(false) {}
  bool ice_restart;
  bool prefer_passive_role;
};

// Creates transport descriptions according to the supplied configuration.
// When creating answers, performs the appropriate negotiation
// of the various fields to determine the proper result.
class TransportDescriptionFactory {
 public:
  // Default ctor; use methods below to set configuration.
  TransportDescriptionFactory();
  SecurePolicy secure() const { return secure_; }
  // The certificate to use when setting up DTLS.
  const rtc::scoped_refptr<rtc::RTCCertificate>& certificate() const {
    return certificate_;
  }

  // Specifies the transport security policy to use.
  void set_secure(SecurePolicy s) { secure_ = s; }
  // Specifies the certificate to use (only used when secure != SEC_DISABLED).
  void set_certificate(
      const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) {
    certificate_ = certificate;
  }

  // Creates a transport description suitable for use in an offer.
  TransportDescription* CreateOffer(const TransportOptions& options,
      const TransportDescription* current_description) const;
  // Create a transport description that is a response to an offer.
  TransportDescription* CreateAnswer(
      const TransportDescription* offer,
      const TransportOptions& options,
      const TransportDescription* current_description) const;

 private:
  bool SetSecurityInfo(TransportDescription* description,
                       ConnectionRole role) const;

  SecurePolicy secure_;
  rtc::scoped_refptr<rtc::RTCCertificate> certificate_;
};

}  // namespace cricket

#endif  // WEBRTC_P2P_BASE_TRANSPORTDESCRIPTIONFACTORY_H_