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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2009-2019 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- VNCServerST.h
// Single-threaded VNCServer implementation
#ifndef __RFB_VNCSERVERST_H__
#define __RFB_VNCSERVERST_H__
#include <sys/time.h>
#include <rfb/SDesktop.h>
#include <rfb/VNCServer.h>
#include <rfb/Blacklist.h>
#include <rfb/Cursor.h>
#include <rfb/Timer.h>
#include <rfb/ScreenSet.h>
namespace rfb {
class VNCSConnectionST;
class ComparingUpdateTracker;
class ListConnInfo;
class PixelBuffer;
class KeyRemapper;
class VNCServerST : public VNCServer,
public Timer::Callback {
public:
// -=- Constructors
// Create a server exporting the supplied desktop.
VNCServerST(const char* name_, SDesktop* desktop_);
virtual ~VNCServerST();
// Methods overridden from VNCServer
// addSocket
// Causes the server to allocate an RFB-protocol management
// structure for the socket & initialise it.
virtual void addSocket(network::Socket* sock, bool outgoing=false,
AccessRights ar=AccessDefault);
// removeSocket
// Clean up any resources associated with the Socket
virtual void removeSocket(network::Socket* sock);
// getSockets() gets a list of sockets. This can be used to generate an
// fd_set for calling select().
virtual void getSockets(std::list<network::Socket*>* sockets);
// processSocketReadEvent
// Read more RFB data from the Socket. If an error occurs during
// processing then shutdown() is called on the Socket, causing
// removeSocket() to be called by the caller at a later time.
virtual void processSocketReadEvent(network::Socket* sock);
// processSocketWriteEvent
// Flush pending data from the Socket on to the network.
virtual void processSocketWriteEvent(network::Socket* sock);
virtual void blockUpdates();
virtual void unblockUpdates();
virtual uint64_t getMsc();
virtual void queueMsc(uint64_t target);
virtual void setPixelBuffer(PixelBuffer* pb, const ScreenSet& layout);
virtual void setPixelBuffer(PixelBuffer* pb);
virtual void setScreenLayout(const ScreenSet& layout);
virtual const PixelBuffer* getPixelBuffer() const { return pb; }
virtual void requestClipboard();
virtual void announceClipboard(bool available);
virtual void sendClipboardData(const char* data);
virtual void approveConnection(network::Socket* sock, bool accept,
const char* reason);
virtual void closeClients(const char* reason) {closeClients(reason, nullptr);}
virtual SConnection* getConnection(network::Socket* sock);
virtual void add_changed(const Region ®ion);
virtual void add_copied(const Region &dest, const Point &delta);
virtual void setCursor(int width, int height, const Point& hotspot,
const uint8_t* data);
virtual void setCursorPos(const Point& p, bool warped);
virtual void setName(const char* name_);
virtual void setLEDState(unsigned state);
virtual void bell();
// VNCServerST-only methods
// Methods to get the currently set server state
const ScreenSet& getScreenLayout() const { return screenLayout; }
const Cursor* getCursor() const { return cursor; }
const Point& getCursorPos() const { return cursorPos; }
const char* getName() const { return name.c_str(); }
unsigned getLEDState() const { return ledState; }
// Event handlers
void keyEvent(uint32_t keysym, uint32_t keycode, bool down);
void pointerEvent(VNCSConnectionST* client, const Point& pos, int buttonMask);
void handleClipboardRequest(VNCSConnectionST* client);
void handleClipboardAnnounce(VNCSConnectionST* client, bool available);
void handleClipboardData(VNCSConnectionST* client, const char* data);
unsigned int setDesktopSize(VNCSConnectionST* requester,
int fb_width, int fb_height,
const ScreenSet& layout);
// closeClients() closes all RFB sessions, except the specified one (if
// any), and logs the specified reason for closure.
void closeClients(const char* reason, network::Socket* sock);
// queryConnection() does some basic checks and then passes on the
// request to the desktop.
void queryConnection(VNCSConnectionST* client, const char* userName);
// clientReady() is called by a VNCSConnectionST instance when the
// client has completed the handshake and is ready for normal
// communication.
void clientReady(VNCSConnectionST* client, bool shared);
// Estimated time until the next time new updates will be pushed
// to clients
int msToNextUpdate();
// Part of the framebuffer that has been modified but is not yet
// ready to be sent to clients
Region getPendingRegion();
// getRenderedCursor() returns an up to date version of the server
// side rendered cursor buffer
const RenderedCursor* getRenderedCursor();
protected:
// Timer callbacks
virtual void handleTimeout(Timer* t);
// - Internal methods
void startDesktop();
void stopDesktop();
// - Check how many of the clients are authenticated.
int authClientCount();
bool needRenderedCursor();
void startFrameClock();
void stopFrameClock();
void writeUpdate();
bool getComparerState();
protected:
Blacklist blacklist;
Blacklist* blHosts;
SDesktop* desktop;
bool desktopStarted;
int blockCounter;
PixelBuffer* pb;
ScreenSet screenLayout;
unsigned int ledState;
std::string name;
std::list<VNCSConnectionST*> clients;
VNCSConnectionST* pointerClient;
VNCSConnectionST* clipboardClient;
std::list<VNCSConnectionST*> clipboardRequestors;
std::list<network::Socket*> closingSockets;
time_t pointerClientTime;
ComparingUpdateTracker* comparer;
Point cursorPos;
Cursor* cursor;
RenderedCursor renderedCursor;
bool renderedCursorInvalid;
KeyRemapper* keyRemapper;
Timer idleTimer;
Timer disconnectTimer;
Timer connectTimer;
uint64_t msc, queuedMsc;
Timer frameTimer;
};
};
#endif
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