Implement exponential backoff for failed Me2Me authentication attempts

remoting/protocol/session_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The purpose of SessionManager is to facilitate creation of chromotocol
 // sessions. Both host and client use it to establish chromotocol
 // sessions. JingleChromotocolServer implements this inteface using
 // libjingle.
 //
 // OUTGOING SESSIONS
@@ skipping 92 matching lines @@
 // Generic interface for Chromoting session manager.
 //
 // TODO(sergeyu): Split this into two separate interfaces: one for the
 // client side and one for the host side.
 class SessionManager : public base::NonThreadSafe {
  public:
   SessionManager() { }
   virtual ~SessionManager() { }
 
   enum IncomingSessionResponse {
+    // Accept the session.
     ACCEPT,
+
+    // Reject the session due to incompatible session configuration.
     INCOMPATIBLE,
+
+    // Reject the session because the host is currently disabled due
+    // to previous login attempts.
+    DISABLED,
+
+    // Reject the session because the client is not allowed to connect
+    // to the host.
     DECLINE,
   };
 
   class Listener {
    public:
     Listener() { }
     ~Listener() { }
 
     // Called when the session manager is ready to create outgoing
     // sessions. May be called from Init() or after Init()
@@ skipping 46 matching lines @@
       scoped_ptr<AuthenticatorFactory> authenticator_factory) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SessionManager);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_SESSION_MANAGER_H_