1/*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
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_TRANSPORTCHANNELPROXY_H_
29#define TALK_P2P_BASE_TRANSPORTCHANNELPROXY_H_
30
31#include <string>
32#include <utility>
33#include <vector>
34
35#include "talk/p2p/base/transportchannel.h"
36#include "webrtc/base/messagehandler.h"
37
38namespace rtc {
39class Thread;
40}
41
42namespace cricket {
43
44class TransportChannelImpl;
45
46// Proxies calls between the client and the transport channel implementation.
47// This is needed because clients are allowed to create channels before the
48// network negotiation is complete.  Hence, we create a proxy up front, and
49// when negotiation completes, connect the proxy to the implementaiton.
50class TransportChannelProxy : public TransportChannel,
51                              public rtc::MessageHandler {
52 public:
53  TransportChannelProxy(const std::string& content_name,
54                        const std::string& name,
55                        int component);
56  virtual ~TransportChannelProxy();
57
58  const std::string& name() const { return name_; }
59  TransportChannelImpl* impl() { return impl_; }
60
61  // Sets the implementation to which we will proxy.
62  void SetImplementation(TransportChannelImpl* impl);
63
64  // Implementation of the TransportChannel interface.  These simply forward to
65  // the implementation.
66  virtual int SendPacket(const char* data, size_t len,
67                         const rtc::PacketOptions& options,
68                         int flags);
69  virtual int SetOption(rtc::Socket::Option opt, int value);
70  virtual int GetError();
71  virtual IceRole GetIceRole() const;
72  virtual bool GetStats(ConnectionInfos* infos);
73  virtual bool IsDtlsActive() const;
74  virtual bool GetSslRole(rtc::SSLRole* role) const;
75  virtual bool SetSslRole(rtc::SSLRole role);
76  virtual bool SetSrtpCiphers(const std::vector<std::string>& ciphers);
77  virtual bool GetSrtpCipher(std::string* cipher);
78  virtual bool GetLocalIdentity(rtc::SSLIdentity** identity) const;
79  virtual bool GetRemoteCertificate(rtc::SSLCertificate** cert) const;
80  virtual bool ExportKeyingMaterial(const std::string& label,
81                            const uint8* context,
82                            size_t context_len,
83                            bool use_context,
84                            uint8* result,
85                            size_t result_len);
86
87 private:
88  // Catch signals from the implementation channel.  These just forward to the
89  // client (after updating our state to match).
90  void OnReadableState(TransportChannel* channel);
91  void OnWritableState(TransportChannel* channel);
92  void OnReadPacket(TransportChannel* channel, const char* data, size_t size,
93                    const rtc::PacketTime& packet_time, int flags);
94  void OnReadyToSend(TransportChannel* channel);
95  void OnRouteChange(TransportChannel* channel, const Candidate& candidate);
96
97  void OnMessage(rtc::Message* message);
98
99  typedef std::pair<rtc::Socket::Option, int> OptionPair;
100  typedef std::vector<OptionPair> OptionList;
101  std::string name_;
102  rtc::Thread* worker_thread_;
103  TransportChannelImpl* impl_;
104  OptionList pending_options_;
105  std::vector<std::string> pending_srtp_ciphers_;
106
107  DISALLOW_EVIL_CONSTRUCTORS(TransportChannelProxy);
108};
109
110}  // namespace cricket
111
112#endif  // TALK_P2P_BASE_TRANSPORTCHANNELPROXY_H_
113