Add gnubby authentication to remoting host

remoting/host/gnubby_auth_handler.h

Index: remoting/host/gnubby_auth_handler.h
diff --git a/remoting/host/gnubby_auth_handler.h b/remoting/host/gnubby_auth_handler.h
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+++ b/remoting/host/gnubby_auth_handler.h
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+// Copyright 2014 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.
+
+#ifndef REMOTING_HOST_GNUBBY_AUTH_HANDLER_H_
+#define REMOTING_HOST_GNUBBY_AUTH_HANDLER_H_
+
+#include <map>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/single_thread_task_runner.h"
+#include "net/socket/stream_socket.h"
+#include "net/socket/tcp_server_socket.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace remoting {
+namespace protocol {
+class ClientStub;
+}  // namespace protocol
+
+class GnubbyConnection;
+class GnubbyConnectionFactory;
+
+// Class responsible for proxying authentication data between a local gnubbyd
+// and the client.
+
+class GnubbyAuthHandler {
+ public:
+  GnubbyAuthHandler(
+      scoped_refptr<base::SingleThreadTaskRunner> network_task_runner,
+      GnubbyConnectionFactory* gnubby_connection_factory,
+      protocol::ClientStub* client_stub);
+  virtual ~GnubbyAuthHandler();
+
+  // A message was received from the client.
+  virtual void DeliverClientMessage(const std::string message);
+
+  // The local gnubbyd closed the connection.
+  virtual void ConnectionClosed(int connection_id);
+
+  // A error occurred with the connection to the local gnubbyd.
+  virtual void ConnectionError(int connection_id, int result);
+
+  // Send control message to client.
+  virtual void DeliverHostControlMessage(const std::string control_type,
+                                         const std::string data) const;
+
+  // Send data to client.
+  virtual void DeliverHostDataMessage(int connection_id,
+                                      const std::string data) const;
+
+  // Set the server socket. Takes ownership of |gnubbyd_socket|.
+  void SetGnubbydSocketForTesting(net::TCPServerSocket* gnubbyd_socket);
+
+  // Add a new connection for unit testing. Takes ownership of |pending_socket|
+  // and returns the connection id.
+  int AddGnubbyConnectionForTesting(net::StreamSocket* pending_socket);
+
+  // Returns true if there is a connection with the given id.
+  bool HasGnubbyConnectionForTesting(int connection_id) const;
+
+ private:
+  // Create socket for local gnubbyd.
+  void CreateGnubbydSocket();
+
+  // Listen for gnubbyd connections.
+  void AcceptGnubbydConnections();
+
+  // Called when gnubbyd makes a connection.
+  void OnAccept(int result);
+
+  // Task runner used by this class.
+  scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
+
+  // Factory to create GnubbyConnection objects.
+  GnubbyConnectionFactory* gnubby_connection_factory_;
+
+  // Interfaces through which communication with the client occurs.
+  protocol::ClientStub* client_stub_;
+
+  // Socket used to listen for local gnubbyd connections.
+  scoped_ptr<net::TCPServerSocket> gnubbyd_socket_;
+
+  // Socket that gnubbyd will connect to.
+  scoped_ptr<net::StreamSocket> pending_socket_;
+
+  // The current gnubby connection id.
+  int current_connection_id_;
+
+  // Active connections by connection id.
+  typedef std::map<int, GnubbyConnection*> ConnectionMap;
+  ConnectionMap active_connections_;
+
+  // The port number that gnubbyd will establish connections with.
+  int gnubbyd_listener_port_;
+
+  DISALLOW_COPY_AND_ASSIGN(GnubbyAuthHandler);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_GNUBBY_AUTH_HANDLER_H_