remoting/protocol/jingle_session.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_PROTOCOL_JINGLE_SESSION_H_
   6 #define REMOTING_PROTOCOL_JINGLE_SESSION_H_
   7
   8 #include <list>
   9 #include <map>
  10 #include <set>
  11 #include <string>
  12
  13 #include "base/memory/ref_counted.h"
  14 #include "base/timer/timer.h"
  15 #include "crypto/rsa_private_key.h"
  16 #include "net/base/completion_callback.h"
  17 #include "remoting/protocol/authenticator.h"
  18 #include "remoting/protocol/datagram_channel_factory.h"
  19 #include "remoting/protocol/jingle_messages.h"
  20 #include "remoting/protocol/session.h"
  21 #include "remoting/protocol/session_config.h"
  22 #include "remoting/protocol/transport.h"
  23 #include "remoting/signaling/iq_sender.h"
  24
  25 namespace remoting {
  26 namespace protocol {
  27
  28 class SecureChannelFactory;
  29 class ChannelMultiplexer;
  30 class JingleSessionManager;
  31 class PseudoTcpChannelFactory;
  32
  33 // JingleSessionManager and JingleSession implement the subset of the
  34 // Jingle protocol used in Chromoting. Instances of this class are
  35 // created by the JingleSessionManager.
  36 class JingleSession : public base::NonThreadSafe,
  37                       public Session,
  38                       public DatagramChannelFactory,
  39                       public Transport::EventHandler {
  40  public:
  41   ~JingleSession() override;
  42
  43   // Session interface.
  44   void SetEventHandler(Session::EventHandler* event_handler) override;
  45   ErrorCode error() override;
  46   const std::string& jid() override;
  47   const SessionConfig& config() override;
  48   StreamChannelFactory* GetTransportChannelFactory() override;
  49   StreamChannelFactory* GetMultiplexedChannelFactory() override;
  50   void Close() override;
  51
  52   // DatagramChannelFactory interface.
  53   void CreateChannel(const std::string& name,
  54                      const ChannelCreatedCallback& callback) override;
  55   void CancelChannelCreation(const std::string& name) override;
  56
  57   // Transport::EventHandler interface.
  58   void OnTransportIceCredentials(Transport* transport,
  59                                  const std::string& ufrag,
  60                                  const std::string& password) override;
  61   void OnTransportCandidate(Transport* transport,
  62                             const cricket::Candidate& candidate) override;
  63   void OnTransportRouteChange(Transport* transport,
  64                               const TransportRoute& route) override;
  65   void OnTransportFailed(Transport* transport) override;
  66   void OnTransportDeleted(Transport* transport) override;
  67
  68  private:
  69   friend class JingleSessionManager;
  70
  71   typedef std::map<std::string, Transport*> ChannelsMap;
  72   typedef base::Callback<void(JingleMessageReply::ErrorType)> ReplyCallback;
  73
  74   explicit JingleSession(JingleSessionManager* session_manager);
  75
  76   // Start connection by sending session-initiate message.
  77   void StartConnection(const std::string& peer_jid,
  78                        scoped_ptr<Authenticator> authenticator);
  79
  80   // Passes transport info to a new |channel| in case it was received before the
  81   // channel was created.
  82   void AddPendingRemoteTransportInfo(Transport* channel);
  83
  84   // Called by JingleSessionManager for incoming connections.
  85   void InitializeIncomingConnection(const JingleMessage& initiate_message,
  86                                     scoped_ptr<Authenticator> authenticator);
  87   void AcceptIncomingConnection(const JingleMessage& initiate_message);
  88
  89   // Sends |message| to the peer. The session is closed if the send fails or no
  90   // response is received within a reasonable time. All other responses are
  91   // ignored.
  92   void SendMessage(const JingleMessage& message);
  93
  94   // Iq response handler.
  95   void OnMessageResponse(JingleMessage::ActionType request_type,
  96                          IqRequest* request,
  97                          const buzz::XmlElement* response);
  98
  99   // Creates empty |pending_transport_info_message_| and schedules timer for
 100   // SentTransportInfo() to sent the message later.
 101   void EnsurePendingTransportInfoMessage();
 102
 103   // Sends transport-info message with candidates from |pending_candidates_|.
 104   void SendTransportInfo();
 105
 106   // Response handler for transport-info responses. Transport-info timeouts are
 107   // ignored and don't terminate connection.
 108   void OnTransportInfoResponse(IqRequest* request,
 109                                const buzz::XmlElement* response);
 110
 111   // Called by JingleSessionManager on incoming |message|. Must call
 112   // |reply_callback| to send reply message before sending any other
 113   // messages.
 114   void OnIncomingMessage(const JingleMessage& message,
 115                          const ReplyCallback& reply_callback);
 116
 117   // Message handlers for incoming messages.
 118   void OnAccept(const JingleMessage& message,
 119                 const ReplyCallback& reply_callback);
 120   void OnSessionInfo(const JingleMessage& message,
 121                      const ReplyCallback& reply_callback);
 122   void OnTerminate(const JingleMessage& message,
 123                    const ReplyCallback& reply_callback);
 124   void ProcessTransportInfo(const JingleMessage& message);
 125
 126   // Called from OnAccept() to initialize session config.
 127   bool InitializeConfigFromDescription(const ContentDescription* description);
 128
 129   // Called after the initial incoming authenticator message is processed.
 130   void ContinueAcceptIncomingConnection();
 131
 132   // Called after subsequent authenticator messages are processed.
 133   void ProcessAuthenticationStep();
 134
 135   // Called after the authenticating step is finished.
 136   void ContinueAuthenticationStep();
 137
 138   // Called when authentication is finished.
 139   void OnAuthenticated();
 140
 141   // Terminates the session and sends session-terminate if it is
 142   // necessary. |error| specifies the error code in case when the
 143   // session is being closed due to an error.
 144   void CloseInternal(ErrorCode error);
 145
 146   // Sets |state_| to |new_state| and calls state change callback.
 147   void SetState(State new_state);
 148
 149   // Returns true if the state of the session is not CLOSED or FAILED
 150   bool is_session_active();
 151
 152   JingleSessionManager* session_manager_;
 153   std::string peer_jid_;
 154   Session::EventHandler* event_handler_;
 155
 156   std::string session_id_;
 157   State state_;
 158   ErrorCode error_;
 159
 160   scoped_ptr<SessionConfig> config_;
 161
 162   scoped_ptr<Authenticator> authenticator_;
 163
 164   // Pending Iq requests. Used for all messages except transport-info.
 165   std::set<IqRequest*> pending_requests_;
 166
 167   // Pending transport-info requests.
 168   std::list<IqRequest*> transport_info_requests_;
 169
 170   ChannelsMap channels_;
 171   scoped_ptr<PseudoTcpChannelFactory> pseudotcp_channel_factory_;
 172   scoped_ptr<SecureChannelFactory> secure_channel_factory_;
 173   scoped_ptr<ChannelMultiplexer> channel_multiplexer_;
 174
 175   scoped_ptr<JingleMessage> pending_transport_info_message_;
 176   base::OneShotTimer<JingleSession> transport_info_timer_;
 177
 178   // Pending remote transport info received before the local channels were
 179   // created.
 180   std::list<JingleMessage::IceCredentials> pending_remote_ice_credentials_;
 181   std::list<JingleMessage::NamedCandidate> pending_remote_candidates_;
 182
 183   base::WeakPtrFactory<JingleSession> weak_factory_;
 184
 185   DISALLOW_COPY_AND_ASSIGN(JingleSession);
 186 };
 187
 188 }  // namespace protocol
 189 }  // namespace remoting
 190
 191 #endif  // REMOTING_PROTOCOL_JINGLE_SESSION_H_