Add gnubby authentication to remoting host

remoting/host/gnubby_advertiser.h

+// 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_ADVERTISER_H_
+#define REMOTING_HOST_GNUBBY_ADVERTISER_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/single_thread_task_runner.h"
+#include "net/base/io_buffer.h"
+#include "net/socket/client_socket_factory.h"
+#include "net/socket/stream_socket.h"
+
+namespace remoting {
+
+// Class that advertises to the local gnubbyd that a port on the localhost will
+// accept gnubbyd requests.
+
+class GnubbyAdvertiser : public base::RefCountedThreadSafe<GnubbyAdvertiser> {
+ public:
+  GnubbyAdvertiser(
+      scoped_refptr<base::SingleThreadTaskRunner> network_task_runner,
+      net::ClientSocketFactory* client_socket_factory);
+
+  // Advertise a port to the local gnubbyd. The instance reference count is
+  // incremented so that callers do not have to maintain a reference until all
+  // of the callbacks are complete.
+  void Advertise(int proxy_port);
+
+ private:
+  friend class base::RefCountedThreadSafe<GnubbyAdvertiser>;
+
+  virtual ~GnubbyAdvertiser();
+
+  // Close the gnubbyd socket.
+  void Close(int result);
+
+  // Called when connection is made to gnubbyd socket.
+  void OnConnect(int result);
+
+  // Write advertiser information to gnubbyd.
+  void Write();
+
+  // Called when data was written to the gnubbyd socket.
+  void OnWrite(int result);
+
+  // Read response to advertiser information.
+  void Read();
+
+  // Called when data was read from the gnubbyd socket.
+  void OnRead(int result);
+
+  // Task runner used by this class.
+  scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
+
+  // Factory to create socket to advertise with gnubbyd.
+  net::ClientSocketFactory* client_socket_factory_;
+
+  // Socket used to communicate with local gnubbyd.
+  scoped_ptr<net::StreamSocket> socket_;
+
+  // Port to be advertised.
+  int proxy_port_;
+
+  // Input I/O buffer for socket reads.
+  scoped_refptr<net::IOBufferWithSize> in_buffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(GnubbyAdvertiser);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_GNUBBY_ADVERTISER_H_