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* 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.
#include <memory>
#include <utility>
#include "api/field_trials_view.h"
#include "p2p/base/ice_credentials_iterator.h"
#include "p2p/base/transport_description.h"
#include "rtc_base/rtc_certificate.h"
namespace rtc {
class SSLIdentity;
namespace cricket {
struct TransportOptions {
bool ice_restart = false;
bool prefer_passive_role = false;
// If true, ICE renomination is supported and will be used if it is also
// supported by the remote side.
bool enable_ice_renomination = false;
// 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 {
// Default ctor; use methods below to set configuration.
explicit TransportDescriptionFactory(
const webrtc::FieldTrialsView& field_trials);
// The certificate to use when setting up DTLS.
const rtc::scoped_refptr<rtc::RTCCertificate>& certificate() const {
return certificate_;
// Specifies the certificate to use
void set_certificate(rtc::scoped_refptr<rtc::RTCCertificate> certificate) {
certificate_ = std::move(certificate);
// Creates a transport description suitable for use in an offer.
std::unique_ptr<TransportDescription> CreateOffer(
const TransportOptions& options,
const TransportDescription* current_description,
IceCredentialsIterator* ice_credentials) const;
// Create a transport description that is a response to an offer.
// If `require_transport_attributes` is true, then TRANSPORT category
// attributes are expected to be present in `offer`, as defined by
// sdp-mux-attributes, and null will be returned otherwise. It's expected
// that this will be set to false for an m= section that's in a BUNDLE group
// but isn't the first m= section in the group.
std::unique_ptr<TransportDescription> CreateAnswer(
const TransportDescription* offer,
const TransportOptions& options,
bool require_transport_attributes,
const TransportDescription* current_description,
IceCredentialsIterator* ice_credentials) const;
const webrtc::FieldTrialsView& trials() const { return field_trials_; }
// Functions for disabling encryption - test only!
// In insecure mode, the connection will accept a description without
// fingerprint, and will generate SDP even if certificate is not set.
// If certificate is set, it will accept a description both with and
// without fingerprint, but will generate a description with fingerprint.
bool insecure() const { return insecure_; }
void SetInsecureForTesting() { insecure_ = true; }
bool SetSecurityInfo(TransportDescription* description,
ConnectionRole role) const;
bool insecure_ = false;
rtc::scoped_refptr<rtc::RTCCertificate> certificate_;
const webrtc::FieldTrialsView& field_trials_;
} // namespace cricket