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// 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_CONNECTION_TO_CLIENT_H_
#define REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
#include <deque>
#include <string>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "base/threading/non_thread_safe.h"
#include "remoting/protocol/audio_writer.h"
#include "remoting/protocol/session.h"
namespace remoting {
namespace protocol {
class ClientStub;
class ClipboardStub;
class HostControlDispatcher;
class HostEventDispatcher;
class HostStub;
class HostVideoDispatcher;
class InputStub;
class VideoFeedbackStub;
class VideoStub;
// This class represents a remote viewer connection to the chromoting
// host. It sets up all protocol channels and connects them to the
// stubs.
class ConnectionToClient : public base::NonThreadSafe,
public Session::EventHandler,
public ChannelDispatcherBase::EventHandler {
public:
class EventHandler {
public:
// Called when the network connection is authenticating
virtual void OnConnectionAuthenticating(ConnectionToClient* connection) = 0;
// Called when the network connection is authenticated.
virtual void OnConnectionAuthenticated(ConnectionToClient* connection) = 0;
// Called when the network connection is authenticated and all
// channels are connected.
virtual void OnConnectionChannelsConnected(
ConnectionToClient* connection) = 0;
// Called when the network connection is closed or failed.
virtual void OnConnectionClosed(ConnectionToClient* connection,
ErrorCode error) = 0;
// Called when sequence number is updated.
virtual void OnEventTimestamp(ConnectionToClient* connection,
int64 timestamp) = 0;
// Called on notification of a route change event, which happens when a
// channel is connected.
virtual void OnRouteChange(ConnectionToClient* connection,
const std::string& channel_name,
const TransportRoute& route) = 0;
protected:
virtual ~EventHandler() {}
};
// Constructs a ConnectionToClient object for the |session|. Takes
// ownership of |session|.
explicit ConnectionToClient(Session* session);
~ConnectionToClient() override;
// Set |event_handler| for connection events. Must be called once when this
// object is created.
void SetEventHandler(EventHandler* event_handler);
// Returns the connection in use.
virtual Session* session();
// Disconnect the client connection.
virtual void Disconnect();
// Callback for HostEventDispatcher to be called with a timestamp for each
// received event.
virtual void OnEventTimestamp(int64 timestamp);
// Get the stubs used by the host to transmit messages to the client.
// The stubs must not be accessed before OnConnectionAuthenticated(), or
// after OnConnectionClosed().
// Note that the audio stub will be nullptr if audio is not enabled.
virtual VideoStub* video_stub();
virtual AudioStub* audio_stub();
virtual ClientStub* client_stub();
// Set the stubs which will handle messages we receive from the client. These
// must be called in EventHandler::OnConnectionAuthenticated().
virtual void set_clipboard_stub(ClipboardStub* clipboard_stub);
virtual void set_host_stub(HostStub* host_stub);
virtual void set_input_stub(InputStub* input_stub);
// Sets video feedback stub. Can be called at any time after connection is
// authenticated.
virtual void set_video_feedback_stub(VideoFeedbackStub* video_feedback_stub);
// Session::EventHandler interface.
void OnSessionStateChange(Session::State state) override;
void OnSessionRouteChange(const std::string& channel_name,
const TransportRoute& route) override;
// ChannelDispatcherBase::EventHandler interface.
void OnChannelInitialized(ChannelDispatcherBase* channel_dispatcher) override;
void OnChannelError(ChannelDispatcherBase* channel_dispatcher,
ErrorCode error) override;
private:
void NotifyIfChannelsReady();
void Close(ErrorCode error);
// Stops writing in the channels.
void CloseChannels();
// Event handler for handling events sent from this object.
EventHandler* handler_;
// The libjingle channel used to send and receive data from the remote client.
scoped_ptr<Session> session_;
scoped_ptr<HostControlDispatcher> control_dispatcher_;
scoped_ptr<HostEventDispatcher> event_dispatcher_;
scoped_ptr<HostVideoDispatcher> video_dispatcher_;
scoped_ptr<AudioWriter> audio_writer_;
DISALLOW_COPY_AND_ASSIGN(ConnectionToClient);
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
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