1/*
2 * libjingle
3 * Copyright 2012 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef TALK_P2P_BASE_TRANSPORTDESCRIPTIONFACTORY_H_
29#define TALK_P2P_BASE_TRANSPORTDESCRIPTIONFACTORY_H_
30
31#include "talk/p2p/base/transportdescription.h"
32
33namespace rtc {
34class SSLIdentity;
35}
36
37namespace cricket {
38
39struct TransportOptions {
40  TransportOptions() : ice_restart(false), prefer_passive_role(false) {}
41  bool ice_restart;
42  bool prefer_passive_role;
43};
44
45// Creates transport descriptions according to the supplied configuration.
46// When creating answers, performs the appropriate negotiation
47// of the various fields to determine the proper result.
48class TransportDescriptionFactory {
49 public:
50  // Default ctor; use methods below to set configuration.
51  TransportDescriptionFactory();
52  SecurePolicy secure() const { return secure_; }
53  // The identity to use when setting up DTLS.
54  rtc::SSLIdentity* identity() const { return identity_; }
55
56  // Specifies the transport protocol to be use.
57  void set_protocol(TransportProtocol protocol) { protocol_ = protocol; }
58  // Specifies the transport security policy to use.
59  void set_secure(SecurePolicy s) { secure_ = s; }
60  // Specifies the identity to use (only used when secure is not SEC_DISABLED).
61  void set_identity(rtc::SSLIdentity* identity) { identity_ = identity; }
62
63  // Creates a transport description suitable for use in an offer.
64  TransportDescription* CreateOffer(const TransportOptions& options,
65      const TransportDescription* current_description) const;
66  // Create a transport description that is a response to an offer.
67  TransportDescription* CreateAnswer(
68      const TransportDescription* offer,
69      const TransportOptions& options,
70      const TransportDescription* current_description) const;
71
72 private:
73  bool SetSecurityInfo(TransportDescription* description,
74                       ConnectionRole role) const;
75
76  TransportProtocol protocol_;
77  SecurePolicy secure_;
78  rtc::SSLIdentity* identity_;
79};
80
81}  // namespace cricket
82
83#endif  // TALK_P2P_BASE_TRANSPORTDESCRIPTIONFACTORY_H_
84