mirror of
https://github.com/kasmtech/KasmVNC.git
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269 lines
9.1 KiB
C++
269 lines
9.1 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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* Copyright 2009-2016 Pierre Ossman for Cendio AB
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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//
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// VNCSConnectionST is our derived class of SConnection for VNCServerST - there
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// is one for each connected client. We think of VNCSConnectionST as part of
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// the VNCServerST implementation, so its methods are allowed full access to
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// members of VNCServerST.
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//
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#ifndef __RFB_VNCSCONNECTIONST_H__
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#define __RFB_VNCSCONNECTIONST_H__
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#include <map>
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#include <rfb/Congestion.h>
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#include <rfb/EncodeManager.h>
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#include <rfb/SConnection.h>
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#include <rfb/Timer.h>
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namespace rfb {
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class VNCServerST;
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class VNCSConnectionST : public SConnection,
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public Timer::Callback {
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public:
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VNCSConnectionST(VNCServerST* server_, network::Socket* s, bool reverse);
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virtual ~VNCSConnectionST();
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// Methods called from VNCServerST. None of these methods ever knowingly
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// throw an exception.
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// Unless otherwise stated, the SConnectionST may not be valid after any of
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// these methods are called, since they catch exceptions and may have
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// called close() which deletes the object.
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// init() must be called to initialise the protocol. If it fails it
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// returns false, and close() will have been called.
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bool init();
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// close() shuts down the socket to the client and deletes the
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// SConnectionST object.
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void close(const char* reason);
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// processMessages() processes incoming messages from the client, invoking
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// various callbacks as a result. It continues to process messages until
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// reading might block. shutdown() will be called on the connection's
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// Socket if an error occurs, via the close() call.
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void processMessages();
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// flushSocket() pushes any unwritten data on to the network.
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void flushSocket();
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// Called when the underlying pixelbuffer is resized or replaced.
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void pixelBufferChange();
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// Wrappers to make these methods "safe" for VNCServerST.
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void writeFramebufferUpdateOrClose();
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void screenLayoutChangeOrClose(rdr::U16 reason);
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void setCursorOrClose();
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void bellOrClose();
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void serverCutTextOrClose(const char *str, int len);
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void setDesktopNameOrClose(const char *name);
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void setLEDStateOrClose(unsigned int state);
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// checkIdleTimeout() returns the number of milliseconds left until the
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// idle timeout expires. If it has expired, the connection is closed and
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// zero is returned. Zero is also returned if there is no idle timeout.
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int checkIdleTimeout();
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// The following methods never throw exceptions nor do they ever delete the
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// SConnectionST object.
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// getComparerState() returns if this client would like the framebuffer
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// comparer to be enabled.
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bool getComparerState();
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// renderedCursorChange() is called whenever the server-side rendered
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// cursor changes shape or position. It ensures that the next update will
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// clean up the old rendered cursor and if necessary draw the new rendered
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// cursor.
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void renderedCursorChange();
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// needRenderedCursor() returns true if this client needs the server-side
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// rendered cursor. This may be because it does not support local cursor
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// or because the current cursor position has not been set by this client.
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bool needRenderedCursor();
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network::Socket* getSock() { return sock; }
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void add_changed(const Region& region) { updates.add_changed(region); }
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void add_changed_all() { updates.add_changed(server->pb->getRect()); }
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void add_copied(const Region& dest, const Point& delta) {
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updates.add_copied(dest, delta);
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}
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void add_copypassed(const std::vector<CopyPassRect> &in) {
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// If we're adding to a non-empty list, it means something
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// changed, and we have to convert the new list into changes.
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//
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// The new change might be a scroll, and just adding would break
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// the order!
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// (copies 1f, changes 1f, copies 2f, changes 2f -> copies, changes)
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//
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// However, it shouldn't happen, as we changed the caller to save
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// cpu on those frames. No point calculating scroll copies that wouldn't
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// be used. It should only happen if there's multiple clients, and one is
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// slow.
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if (copypassed.size()) {
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Region everything;
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for (std::vector<CopyPassRect>::const_iterator it = in.begin();
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it != in.end(); it++) {
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everything.assign_union(it->rect);
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}
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add_changed(everything);
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return;
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}
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copypassed = in;
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}
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bool has_copypassed() const {
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return copypassed.size() != 0;
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}
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const char* getPeerEndpoint() const {return peerEndpoint.buf;}
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// approveConnectionOrClose() is called some time after
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// VNCServerST::queryConnection() has returned with PENDING to accept or
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// reject the connection. The accept argument should be true for
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// acceptance, or false for rejection, in which case a string reason may
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// also be given.
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void approveConnectionOrClose(bool accept, const char* reason);
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char* getStartTime();
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void setStatus(int status);
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int getStatus();
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private:
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// SConnection callbacks
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// These methods are invoked as callbacks from processMsg(). Note that
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// none of these methods should call any of the above methods which may
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// delete the SConnectionST object.
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virtual void authSuccess();
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virtual void queryConnection(const char* userName);
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virtual void clientInit(bool shared);
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virtual void setPixelFormat(const PixelFormat& pf);
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virtual void pointerEvent(const Point& pos, int buttonMask);
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virtual void keyEvent(rdr::U32 keysym, rdr::U32 keycode, bool down);
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virtual void clientCutText(const char* str, int len);
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virtual void framebufferUpdateRequest(const Rect& r, bool incremental);
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virtual void setDesktopSize(int fb_width, int fb_height,
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const ScreenSet& layout);
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virtual void fence(rdr::U32 flags, unsigned len, const char data[]);
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virtual void enableContinuousUpdates(bool enable,
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int x, int y, int w, int h);
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virtual void supportsLocalCursor();
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virtual void supportsFence();
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virtual void supportsContinuousUpdates();
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virtual void supportsLEDState();
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virtual void sendStats();
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// setAccessRights() allows a security package to limit the access rights
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// of a VNCSConnectioST to the server. These access rights are applied
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// such that the actual rights granted are the minimum of the server's
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// default access settings and the connection's access settings.
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virtual void setAccessRights(AccessRights ar) {accessRights=ar;}
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// Timer callbacks
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virtual bool handleTimeout(Timer* t);
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// Internal methods
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bool isShiftPressed();
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// Congestion control
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void writeRTTPing();
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bool isCongested();
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// writeFramebufferUpdate() attempts to write a framebuffer update to the
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// client.
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void writeFramebufferUpdate();
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void writeNoDataUpdate();
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void writeDataUpdate();
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void screenLayoutChange(rdr::U16 reason);
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void setCursor();
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void setDesktopName(const char *name);
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void setLEDState(unsigned int state);
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void setSocketTimeouts();
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network::Socket* sock;
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CharArray peerEndpoint;
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bool reverseConnection;
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bool inProcessMessages;
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bool pendingSyncFence, syncFence;
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rdr::U32 fenceFlags;
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unsigned fenceDataLen;
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char *fenceData;
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Congestion congestion;
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Timer congestionTimer;
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Timer losslessTimer;
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Timer kbdLogTimer;
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VNCServerST* server;
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SimpleUpdateTracker updates;
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Region requested;
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bool updateRenderedCursor, removeRenderedCursor;
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Region damagedCursorRegion;
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bool continuousUpdates;
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Region cuRegion;
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EncodeManager encodeManager;
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std::map<rdr::U32, rdr::U32> pressedKeys;
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enum {
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BS_CPU_CLOSE,
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BS_CPU_SLOW,
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BS_NET_SLOW,
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BS_FRAME,
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BS_NUM
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};
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std::list<struct timeval> bstats[BS_NUM]; // Bottleneck stats
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rdr::U64 bstats_total[BS_NUM];
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struct timeval connStart;
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time_t lastEventTime;
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time_t pointerEventTime;
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Point pointerEventPos;
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bool clientHasCursor;
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struct timeval lastRealUpdate;
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struct timeval lastClipboardOp;
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struct timeval lastKeyEvent;
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AccessRights accessRights;
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CharArray closeReason;
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time_t startTime;
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std::vector<CopyPassRect> copypassed;
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};
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}
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#endif
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