Implement ChannelMultiplexer.

remoting/protocol/channel_factory.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.
+
+#ifndef REMOTING_PROTOCOL_CHANNEL_FACTORY_H_
+#define REMOTING_PROTOCOL_CHANNEL_FACTORY_H_
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/non_thread_safe.h"
+
+namespace net {
+class Socket;
+class StreamSocket;
+}  // namespace net
+
+namespace remoting {
+namespace protocol {
+
+class ChannelFactory : public base::NonThreadSafe {
+ public:
+  // TODO(sergeyu): Specify connection error code when channel
+  // connection fails.
+  typedef base::Callback<void(scoped_ptr<net::StreamSocket>)>
+      StreamChannelCallback;
+  typedef base::Callback<void(scoped_ptr<net::Socket>)>
+      DatagramChannelCallback;
+
+  ChannelFactory() {}
+
+  // Creates new channels for this connection. The specified callback is called
+  // when then new channel is created and connected. The callback is called with
+  // NULL if connection failed for any reason. Callback may be called
+  // synchronously, before the call returns. All channels must be destroyed
+  // before the factory is destroyed and CancelChannelCreation() must be called
+  // to cancel creation of channels for which the |callback| hasn't been called
+  // yet.
+  virtual void CreateStreamChannel(
+      const std::string& name, const StreamChannelCallback& callback) = 0;
+  virtual void CreateDatagramChannel(
+      const std::string& name, const DatagramChannelCallback& callback) = 0;
+
+  // Cancels a pending CreateStreamChannel() or CreateDatagramChannel()
+  // operation for the named channel. If the channel creation already
+  // completed then canceling it has no effect. When shutting down
+  // this method must be called for each channel pending creation.
+  virtual void CancelChannelCreation(const std::string& name) = 0;
+
+ protected:
+  virtual ~ChannelFactory() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ChannelFactory);
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_CHANNEL_FACTORY_H_