1 /* 2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef P2P_BASE_TRANSPORT_DESCRIPTION_FACTORY_H_ 12 #define P2P_BASE_TRANSPORT_DESCRIPTION_FACTORY_H_ 13 14 #include <memory> 15 #include <utility> 16 17 #include "api/field_trials_view.h" 18 #include "p2p/base/ice_credentials_iterator.h" 19 #include "p2p/base/transport_description.h" 20 #include "rtc_base/rtc_certificate.h" 21 22 namespace rtc { 23 class SSLIdentity; 24 } 25 26 namespace cricket { 27 28 struct TransportOptions { 29 bool ice_restart = false; 30 bool prefer_passive_role = false; 31 // If true, ICE renomination is supported and will be used if it is also 32 // supported by the remote side. 33 bool enable_ice_renomination = false; 34 }; 35 36 // Creates transport descriptions according to the supplied configuration. 37 // When creating answers, performs the appropriate negotiation 38 // of the various fields to determine the proper result. 39 class TransportDescriptionFactory { 40 public: 41 // Default ctor; use methods below to set configuration. 42 explicit TransportDescriptionFactory( 43 const webrtc::FieldTrialsView& field_trials); 44 ~TransportDescriptionFactory(); 45 secure()46 SecurePolicy secure() const { return secure_; } 47 // The certificate to use when setting up DTLS. certificate()48 const rtc::scoped_refptr<rtc::RTCCertificate>& certificate() const { 49 return certificate_; 50 } 51 52 // Specifies the transport security policy to use. set_secure(SecurePolicy s)53 void set_secure(SecurePolicy s) { secure_ = s; } 54 // Specifies the certificate to use (only used when secure != SEC_DISABLED). set_certificate(rtc::scoped_refptr<rtc::RTCCertificate> certificate)55 void set_certificate(rtc::scoped_refptr<rtc::RTCCertificate> certificate) { 56 certificate_ = std::move(certificate); 57 } 58 59 // Creates a transport description suitable for use in an offer. 60 std::unique_ptr<TransportDescription> CreateOffer( 61 const TransportOptions& options, 62 const TransportDescription* current_description, 63 IceCredentialsIterator* ice_credentials) const; 64 // Create a transport description that is a response to an offer. 65 // 66 // If `require_transport_attributes` is true, then TRANSPORT category 67 // attributes are expected to be present in `offer`, as defined by 68 // sdp-mux-attributes, and null will be returned otherwise. It's expected 69 // that this will be set to false for an m= section that's in a BUNDLE group 70 // but isn't the first m= section in the group. 71 std::unique_ptr<TransportDescription> CreateAnswer( 72 const TransportDescription* offer, 73 const TransportOptions& options, 74 bool require_transport_attributes, 75 const TransportDescription* current_description, 76 IceCredentialsIterator* ice_credentials) const; 77 trials()78 const webrtc::FieldTrialsView& trials() const { return field_trials_; } 79 80 private: 81 bool SetSecurityInfo(TransportDescription* description, 82 ConnectionRole role) const; 83 84 SecurePolicy secure_; 85 rtc::scoped_refptr<rtc::RTCCertificate> certificate_; 86 const webrtc::FieldTrialsView& field_trials_; 87 }; 88 89 } // namespace cricket 90 91 #endif // P2P_BASE_TRANSPORT_DESCRIPTION_FACTORY_H_ 92