/*
 * rfb.h - header file for RFB DDX implementation.
 */

/*
 *  Copyright (C) 2010-2015 D. R. Commander
 *  Copyright (C) 2010 University Corporation for Atmospheric Research.
 *                     All Rights Reserved.
 *  Copyright (C) 2000-2004 Const Kaplinsky.  All Rights Reserved.
 *  Copyright (C) 2000 Tridia Corporation.  All Rights Reserved.
 *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *  USA.
 */

#ifndef __RFB_H__
#define __RFB_H__


#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "scrnintstr.h"
#include "colormapst.h"
#include "gcstruct.h"
#include "osdep.h"
#include <rfbproto.h>
#include <vncauth.h>
#include <zlib.h>
#include <stdarg.h>
#include <pthread.h>
#include <sys/socket.h>
#include <sys/time.h>
#ifdef RENDER
#include "picturestr.h"
#endif
#ifdef RANDR
#include "randrstr.h"
#endif
#include "mipointer.h"
#include "input.h"

/* It's a good idea to keep these values a bit greater than required. */
#define MAX_ENCODINGS 18
#define MAX_SECURITY_TYPES 4
#define MAX_TUNNELING_CAPS 16
#define MAX_AUTH_CAPS 16

/* Protect ourself against a denial of service */
#define MAX_CUTTEXT_LEN (1 * 1024 * 1024)

extern char *display;


/*
 * Per-screen (framebuffer) structure.  There is only one of these, since we
 * don't allow the X server to have multiple screens.
 */

typedef struct
{
    int width;
    int paddedWidthInBytes;
    int height;
    int depth;
    int bitsPerPixel;
    int sizeInBytes;
    char *pfbMemory;
    Pixel blackPixel;
    Pixel whitePixel;

    /* The following two members are used to minimise the amount of unnecessary
       drawing caused by cursor movement.  Whenever any drawing affects the
       part of the screen where the cursor is, the cursor is removed first and
       then the drawing is done (this is what the sprite routines test for).
       Afterwards, however, we do not replace the cursor, even when the cursor
       is logically being moved across the screen.  We only draw the cursor
       again just as we are about to send the client a framebuffer update.

       We need to be careful when removing and drawing the cursor because of
       their relationship with the normal drawing routines.  The drawing
       routines can invoke the cursor routines, but also the cursor routines
       themselves end up invoking drawing routines.

       Removing the cursor (rfbSpriteRemoveCursor) is eventually achieved by
       doing a CopyArea from a pixmap to the screen, where the pixmap contains
       the saved contents of the screen under the cursor.  Before doing this,
       however, we set cursorIsDrawn to FALSE.  Then, when CopyArea is called,
       it sees that cursorIsDrawn is FALSE and so doesn't feel the need to
       (recursively!) remove the cursor before doing it.

       Putting up the cursor (rfbSpriteRestoreCursor) involves a call to
       PushPixels.  While this is happening, cursorIsDrawn must be FALSE so
       that PushPixels doesn't think it has to remove the cursor first.
       Obviously cursorIsDrawn is set to TRUE afterwards.

       Another problem we face is that drawing routines sometimes cause a
       framebuffer update to be sent to the RFB client.  When the RFB client is
       already waiting for a framebuffer update and some drawing to the
       framebuffer then happens, the drawing routine sees that the client is
       ready, so it calls rfbSendFramebufferUpdate.  If the cursor is not drawn
       at this stage, it must be put up, and so rfbSpriteRestoreCursor is
       called.  However, if the original drawing routine was actually called
       from within rfbSpriteRestoreCursor or rfbSpriteRemoveCursor we don't
       want this to happen.  So both the cursor routines set
       dontSendFramebufferUpdate to TRUE, and all the drawing routines check
       this before calling rfbSendFramebufferUpdate. */

    Bool cursorIsDrawn;             /* TRUE if the cursor is currently drawn */
    Bool dontSendFramebufferUpdate; /* TRUE while removing or drawing the
                                       cursor */

    /* wrapped screen functions */

    CloseScreenProcPtr                  CloseScreen;
    CreateGCProcPtr                     CreateGC;
    CopyWindowProcPtr                   CopyWindow;
    ClearToBackgroundProcPtr            ClearToBackground;
#ifdef RENDER
    CompositeProcPtr                    Composite;
    GlyphsProcPtr                       Glyphs;
#endif
    InstallColormapProcPtr              InstallColormap;
    UninstallColormapProcPtr            UninstallColormap;
    ListInstalledColormapsProcPtr       ListInstalledColormaps;
    StoreColorsProcPtr                  StoreColors;
    SaveScreenProcPtr                   SaveScreen;

} rfbScreenInfo, *rfbScreenInfoPtr;


/*
 * rfbTranslateFnType is the type of translation functions.
 */

struct rfbClientRec;
typedef void (*rfbTranslateFnType)(char *table, rfbPixelFormat *in,
                                   rfbPixelFormat *out,
                                   char *iptr, char *optr,
                                   int bytesBetweenInputLines,
                                   int width, int height);


/*
 * Per-client structure.
 */

typedef struct rfbClientRec {

    int sock;
    char *host;
    char *login;

    int protocol_minor_ver;     /* RFB protocol minor version in use */
    Bool protocol_tightvnc;     /* TightVNC protocol extensions enabled */

    /* Possible client states: */

    enum {
        RFB_PROTOCOL_VERSION,   /* establishing protocol version */
        RFB_SECURITY_TYPE,      /* negotiating security (RFB v.3.7) */
        RFB_TUNNELING_TYPE,     /* establishing tunneling (RFB v.3.7t) */
        RFB_AUTH_TYPE,          /* negotiating authentication (RFB v.3.7t) */
        RFB_AUTHENTICATION,     /* authenticating (VNC authentication) */
        RFB_INITIALISATION,     /* sending initialisation messages */
        RFB_NORMAL              /* normal protocol messages */
    } state;

    Bool viewOnly;              /* Do not accept input from this client. */

    Bool reverseConnection;

    Bool readyForSetColourMapEntries;

    Bool useCopyRect;
    int preferredEncoding;
    int correMaxWidth, correMaxHeight;

    /* The list of security types sent to this client (protocol 3.7).
       Note that the first entry is the number of list items following. */

    CARD8 securityTypes[MAX_SECURITY_TYPES + 1];

    /* Lists of capability codes sent to clients. We remember these
       lists to restrict clients from choosing those tunneling and
       authentication types that were not advertised. */

    int nAuthCaps;
    CARD32 authCaps[MAX_AUTH_CAPS];
    CARD8 selectedAuthType;

    /* This is not useful while we don't support tunneling:
    int nTunnelingCaps;
    CARD32 tunnelingCaps[MAX_TUNNELING_CAPS]; */

    /* The following member is only used during VNC authentication */

    CARD8 authChallenge[CHALLENGESIZE];

    /* The following members represent the update needed to get the client's
       framebuffer from its present state to the current state of our
       framebuffer.

       If the client does not accept CopyRect encoding then the update is
       simply represented as the region of the screen which has been modified
       (modifiedRegion).

       If the client does accept CopyRect encoding, then the update consists of
       two parts.  First we have a single copy from one region of the screen to
       another (the destination of the copy is copyRegion), and second we have
       the region of the screen which has been modified in some other way
       (modifiedRegion).

       Although the copy is of a single region, this region may have many
       rectangles.  When sending an update, the copyRegion is always sent
       before the modifiedRegion.  This is because the modifiedRegion may
       overlap parts of the screen which are in the source of the copy.

       In fact during normal processing, the modifiedRegion may even overlap
       the destination copyRegion.  Just before an update is sent we remove
       from the copyRegion anything in the modifiedRegion. */

    RegionRec copyRegion;       /* the destination region of the copy */
    int copyDX, copyDY;         /* the translation by which the copy happens */

    RegionRec modifiedRegion;   /* the region of the screen modified in any
                                   other way */

    /* As part of the FramebufferUpdateRequest, a client can express interest
       in a subrectangle of the whole framebuffer.  This is stored in the
       requestedRegion member.  In the normal case this is the whole
       framebuffer if the client is ready, empty if it's not. */

    RegionRec requestedRegion;

    /* The following members represent the state of the "deferred update" timer
       - when the framebuffer is modified and the client is ready, in most
       cases it is more efficient to defer sending the update by a few
       milliseconds so that several changes to the framebuffer can be combined
       into a single update. */

    Bool deferredUpdateScheduled;
    OsTimerPtr deferredUpdateTimer;
    double deferredUpdateStart;

    /* translateFn points to the translation function which is used to copy
       and translate a rectangle from the framebuffer to an output buffer. */

    rfbTranslateFnType translateFn;

    char *translateLookupTable;

    rfbPixelFormat format;

    /* statistics */

    long long rfbBytesSent[MAX_ENCODINGS];
    int rfbRectanglesSent[MAX_ENCODINGS];
    int rfbLastRectMarkersSent;
    long long rfbLastRectBytesSent;
    long long rfbCursorShapeBytesSent;
    int rfbCursorShapeUpdatesSent;
    long long rfbCursorPosBytesSent;
    int rfbCursorPosUpdatesSent;
    int rfbFramebufferUpdateMessagesSent;
    long long rfbRawBytesEquivalent;
    int rfbKeyEventsRcvd;
    int rfbPointerEventsRcvd;

    /* zlib encoding -- necessary compression state info per client */

    struct z_stream_s compStream;
    Bool compStreamInited;

    CARD32 zlibCompressLevel;

    /* ZRLE encoding */

    void* zrleData;
    int zywrleLevel;
    int zywrleBuf[rfbZRLETileWidth * rfbZRLETileHeight];
    char *zrleBeforeBuf;
    void *paletteHelper;

    /* tight encoding -- preserve zlib streams' state for each client */

    z_stream zsStruct[4];
    Bool zsActive[4];
    int zsLevel[4];
    int tightCompressLevel;
    int tightSubsampLevel;
    int tightQualityLevel;
    int imageQualityLevel;

    Bool enableLastRectEncoding;   /* client supports LastRect encoding */
    Bool enableCursorShapeUpdates; /* client supports cursor shape updates */
    Bool enableCursorPosUpdates;   /* client supports PointerPos updates */
    Bool enableCU;                 /* client supports Continuous Updates */
    Bool enableFence;              /* client supports fence extension */
    Bool enableDesktopSize;        /* client supports desktop size extension */
    Bool enableExtDesktopSize;     /* client supports extended desktop size
                                      extension */
    Bool useRichCursorEncoding;    /* rfbEncodingRichCursor is preferred */
    Bool cursorWasChanged;         /* cursor shape update should be sent */
    Bool cursorWasMoved;           /* cursor position update should be sent */

    int cursorX, cursorY;          /* client's cursor position */

    Bool firstUpdate;
    OsTimerPtr alrTimer;
    RegionRec lossyRegion, alrRegion, alrEligibleRegion;

    /* Interframe comparison */
    char *compareFB, *fb;
    Bool firstCompare;
    RegionRec ifRegion;

    struct rfbClientRec *prev, *next;

    char *cutText;
    int cutTextLen;

    /* flow control extensions */

    Bool continuousUpdates;
    RegionRec cuRegion;

    Bool pendingSyncFence, syncFence;
    CARD32 fenceFlags;
    unsigned fenceDataLen;
    char fenceData[64];

    unsigned baseRTT;
    unsigned congWindow;
    int ackedOffset, sentOffset, sockOffset;
    unsigned minRTT;
    Bool seenCongestion;
    unsigned pingCounter;
    OsTimerPtr updateTimer;
    OsTimerPtr congestionTimer;
    Bool congestionTimerRunning;
    struct timeval lastWrite;

    Bool pendingDesktopResize;
    int reason;

} rfbClientRec, *rfbClientPtr;


/*
 * This macro is used to test whether there is a framebuffer update needing to
 * be sent to the client.
 */

#define FB_UPDATE_PENDING(cl)                                           \
    ((!(cl)->enableCursorShapeUpdates && !rfbScreen.cursorIsDrawn) ||   \
     ((cl)->enableCursorShapeUpdates && (cl)->cursorWasChanged) ||      \
     ((cl)->enableCursorPosUpdates && (cl)->cursorWasMoved) ||          \
     REGION_NOTEMPTY((pScreen), &(cl)->copyRegion) ||                   \
     REGION_NOTEMPTY((pScreen), &(cl)->modifiedRegion))

/*
 * This macro creates an empty region (ie. a region with no areas) if it is
 * given a rectangle with a width or height of zero. It appears that
 * REGION_INTERSECT does not quite do the right thing with zero-width
 * rectangles, but it should with completely empty regions.
 */

#define SAFE_REGION_INIT(pscreen, preg, rect, size)          \
{                                                            \
      if ( ( (rect)->x2 == (rect)->x1 ) ||                   \
           ( (rect)->y2 == (rect)->y1 ) ) {                  \
          REGION_INIT( (pscreen), (preg), NullBox, 0 );      \
      } else {                                               \
          REGION_INIT( (pscreen), (preg), (rect), (size) );  \
      }                                                      \
}

/*
 * An rfbGCRec is where we store the pointers to the original GC funcs and ops
 * which we wrap (NULL means not wrapped).
 */

typedef struct {
    GCFuncs *wrapFuncs;
    GCOps *wrapOps;
} rfbGCRec, *rfbGCPtr;



/*
 * Macros for endian swapping.
 */

#define Swap16(s) ((((s) & 0xff) << 8) | (((s) >> 8) & 0xff))

#define Swap32(l) (((l) >> 24) | \
                   (((l) & 0x00ff0000) >> 8)  | \
                   (((l) & 0x0000ff00) << 8)  | \
                   ((l) << 24))

static const int rfbEndianTest = 1;

#define Swap16IfLE(s) (*(const char *)&rfbEndianTest ? Swap16(s) : (s))

#define Swap32IfLE(l) (*(const char *)&rfbEndianTest ? Swap32(l) : (l))


/*
 * Macro to fill in an rfbCapabilityInfo structure (protocol 3.7t).
 * Normally, using macros is no good, but this macro saves us from
 * writing constants twice -- it constructs signature names from codes.
 * Note that "code_sym" argument should be a single symbol, not an expression.
 */

#define SetCapInfo(cap_ptr, code_sym, vendor)           \
{                                                       \
    rfbCapabilityInfo *pcap;                            \
    pcap = (cap_ptr);                                   \
    pcap->code = Swap32IfLE(code_sym);                  \
    memcpy(pcap->vendorSignature, (vendor),             \
           sz_rfbCapabilityInfoVendor);                 \
    memcpy(pcap->nameSignature, sig_##code_sym,         \
           sz_rfbCapabilityInfoName);                   \
}


/*
 * These can be used to add profiling information anywhere within the code
 */

#define ProfileInit()  \
    static double __start, __mpixels = 0.;  \
    static int __first = 1;  \
    double __elapsed;  \
    static int __iter = 0;  \
    if (__first) {__start = gettime();  __first = 0;}

#define ProfileCount(message, pixels, time)  \
    __iter++;  \
    __mpixels += (double)(pixels) / 1000000.;  \
    if ((__elapsed = gettime() - __start) >= (double)(time)) {  \
        rfbLog(message":  %f/sec  %f Mpixels/sec\n",  \
            (double)__iter / __elapsed, __mpixels / __elapsed);  \
        __start = gettime();  \
        __iter = 0;  __mpixels = 0.;  \
    }


/* init.c */

extern char *desktopName;
extern char rfbThisHost[];
extern Atom VNC_LAST_CLIENT_ID;

extern rfbScreenInfo rfbScreen;
extern DevPrivateKeyRec rfbGCKey;

extern int inetdSock;
extern struct in_addr interface;
extern struct in6_addr interface6;
extern int family;

extern int rfbBitsPerPixel(int depth);
extern void rfbLog(char *format, ...);
extern void rfbLogPerror(char *str);


/* sockets.c */

extern int rfbMaxClientWait;

extern int udpPort;
extern int udpSock;
extern Bool udpSockConnected;

extern int rfbPort;
extern int rfbListenSock;

extern void rfbInitSockets(void);
extern void rfbDisconnectUDPSock(void);
extern void rfbCloseSock(int);
extern void rfbCloseClient(rfbClientPtr cl);
extern void rfbCheckFds(void);
extern int rfbConnect(char *host, int port);
extern void rfbCorkSock(int sock);
extern void rfbUncorkSock(int sock);

extern int ReadExact(rfbClientPtr cl, char *buf, int len);
extern int SkipExact(rfbClientPtr cl, int len);
extern int WriteExact(rfbClientPtr cl, char *buf, int len);
extern int ListenOnTCPPort(int port);
extern int ListenOnUDPPort(int port);
extern int ConnectToTcpAddr(char *host, int port);

extern const char *sockaddr_string(struct sockaddr_storage *addr, char *buf,
                                   int len);


/* cmap.c */

extern ColormapPtr rfbInstalledColormap;

extern int rfbListInstalledColormaps(ScreenPtr pScreen, Colormap *pmaps);
extern void rfbInstallColormap(ColormapPtr pmap);
extern void rfbUninstallColormap(ColormapPtr pmap);
extern void rfbStoreColors(ColormapPtr pmap, int ndef, xColorItem *pdefs);


/* draw.c */

extern int rfbDeferUpdateTime;

extern void ClipToScreen(ScreenPtr pScreen, RegionPtr pRegion);
void PrintRegion(ScreenPtr pScreen, RegionPtr reg, const char *msg);

#ifdef RENDER
extern void
rfbComposite(
    CARD8 op,
    PicturePtr pSrc,
    PicturePtr pMask,
    PicturePtr pDst,
    INT16 xSrc,
    INT16 ySrc,
    INT16 xMask,
    INT16 yMask,
    INT16 xDst,
    INT16 yDst,
    CARD16 width,
    CARD16 height
);

extern void rfbGlyphs(CARD8 op, PicturePtr pSrc, PicturePtr pDst,
                      PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
                      int nlists, GlyphListPtr lists, GlyphPtr * glyphs);
#endif

extern Bool rfbCloseScreen(int, ScreenPtr);
extern Bool rfbCreateGC(GCPtr);
extern void rfbPaintWindowBackground(WindowPtr, RegionPtr, int what);
extern void rfbPaintWindowBorder(WindowPtr, RegionPtr, int what);
extern void rfbCopyWindow(WindowPtr, DDXPointRec, RegionPtr);
extern void rfbClearToBackground(WindowPtr, int x, int y, int w,
                                 int h, Bool generateExposures);
extern RegionPtr rfbRestoreAreas(WindowPtr, RegionPtr);

/* dispcur.c */
extern Bool rfbDCInitialize(ScreenPtr, miPointerScreenFuncPtr);


/* cutpaste.c */

extern void rfbSetXCutText(char *str, int len);
extern void rfbGotXCutText(char *str, int len);


/* kbdptr.c */

extern Bool compatibleKbd;
extern unsigned char ptrAcceleration;

extern void PtrDeviceOn(DeviceIntPtr);
extern void PtrDeviceControl(DevicePtr, PtrCtrl *);
extern void PtrAddEvent(int buttonMask, int x, int y, rfbClientPtr cl);

extern void KbdDeviceInit(DeviceIntPtr);
extern void KeyEvent(KeySym keySym, Bool down);
extern void KbdReleaseAllKeys(void);


/* rfbserver.c */

/*
 * UPDATE_BUF_SIZE must be big enough to send at least one whole line of the
 * framebuffer.  So for a max screen width of say 2K with 32-bit pixels this
 * means 8K minimum.
 */

#define UPDATE_BUF_SIZE 30000
extern char updateBuf[UPDATE_BUF_SIZE];
extern int ublen;

extern double gettime(void);

extern rfbClientPtr rfbClientHead;
extern rfbClientPtr pointerClient;

extern CARD32 rfbMaxIdleTimeout;
extern CARD32 rfbIdleTimeout;
extern void IdleTimerSet();
extern void IdleTimerCheck();

extern int rfbMaxWidth, rfbMaxHeight;

extern Bool rfbAlwaysShared;
extern Bool rfbNeverShared;
extern Bool rfbDontDisconnect;
extern Bool rfbViewOnly; /* run server in view-only mode - Ehud Karni SW */
extern Bool rfbSyncCutBuffer;
extern Bool rfbCongestionControl;
extern double rfbAutoLosslessRefresh;
extern int rfbALRQualityLevel;
extern int rfbALRSubsampLevel;
extern int rfbInterframe;
extern int rfbMaxClipboard;

#define debugregion(r, m) \
    rfbLog(m" %d, %d %d x %d\n", (r).extents.x1, (r).extents.y1, \
        (r).extents.x2 - (r).extents.x1, (r).extents.y2 - (r).extents.y1)

extern void rfbNewClientConnection(int sock);
extern rfbClientPtr rfbReverseConnection(char *host, int port, int id);
extern void rfbClientConnectionGone(rfbClientPtr cl);
extern void rfbProcessClientMessage(int sock);
extern void rfbNewUDPConnection(int sock);
extern void rfbProcessUDPInput(int sock);
extern Bool rfbSendFramebufferUpdate(rfbClientPtr cl);
extern Bool rfbSendRectEncodingRaw(rfbClientPtr cl, int x, int y, int w,
                                   int h);
extern Bool rfbSendUpdateBuf(rfbClientPtr cl);
extern Bool rfbSendSetColourMapEntries(rfbClientPtr cl, int firstColour,
                                       int nColours);
extern void rfbSendBell(void);
extern void rfbSendServerCutText(char *str, int len);


/* flowcontrol.c */

extern void HandleFence(rfbClientPtr cl, CARD32 flags, unsigned len,
                        const char *data);
extern void rfbInitFlowControl(rfbClientPtr cl);
extern Bool rfbIsCongested(rfbClientPtr cl);
extern void rfbSendEndOfCU(rfbClientPtr cl);
extern Bool rfbSendFence(rfbClientPtr cl, CARD32 flags, unsigned len,
                         const char *data);
extern Bool rfbSendRTTPing(rfbClientPtr cl);


/* randr.c */

#ifdef RANDR
extern Bool ResizeDesktop(ScreenPtr pScreen, int w, int h);
extern Bool vncRRInit(ScreenPtr);
extern void vncRRDeinit(ScreenPtr);
#endif

/* vncextinit.c */

extern void vncClientCutText(const char* str, int len);


/* translate.c */

extern Bool rfbEconomicTranslate;
extern rfbPixelFormat rfbServerFormat;

extern void rfbTranslateNone(char *table, rfbPixelFormat *in,
                             rfbPixelFormat *out,
                             char *iptr, char *optr,
                             int bytesBetweenInputLines,
                             int width, int height);
extern Bool rfbSetTranslateFunction(rfbClientPtr cl);
extern void rfbSetClientColourMaps(int firstColour, int nColours);
extern Bool rfbSetClientColourMap(rfbClientPtr cl, int firstColour,
                                  int nColours);


/* httpd.c */

extern int httpPort;
extern char *httpDir;

extern void httpInitSockets(void);
extern void httpCheckFds(void);



/* auth.c */

void rfbAuthInit(void);
void rfbAuthProcessResponse(rfbClientPtr cl);
extern char* rfbAuthConfigFile;

extern Bool  rfbOptOtpAuth;
extern Bool  rfbOptPamAuth;
extern Bool  rfbOptRfbAuth;

extern char* rfbAuthOTPValue;
extern int   rfbAuthOTPValueLen;
extern Bool  rfbAuthDisableRevCon;
extern Bool  rfbAuthDisableCBSend;
extern Bool  rfbAuthDisableCBRecv;
extern Bool  rfbAuthDisableHTTP;
extern Bool  rfbAuthDisableX11TCP;

#ifdef XVNC_AuthPAM
extern void rfbAuthAddUser(const char* name, Bool viewOnly);
extern void rfbAuthRevokeUser(const char* name);
#endif

extern char *rfbAuthPasswdFile;

extern void rfbAuthNewClient(rfbClientPtr cl);
extern void rfbProcessClientSecurityType(rfbClientPtr cl);
extern void rfbProcessClientTunnelingType(rfbClientPtr cl);
extern void rfbProcessClientAuthType(rfbClientPtr cl);
extern void rfbVncAuthProcessResponse(rfbClientPtr cl);

extern void rfbClientConnFailed(rfbClientPtr cl, char *reason);
extern void rfbClientAuthFailed(rfbClientPtr cl, char *reason);
extern void rfbClientAuthSucceeded(rfbClientPtr cl, CARD32 authType);

/* Functions to prevent too many successive authentication failures */
extern Bool rfbAuthConsiderBlocking(void);
extern void rfbAuthUnblock(void);
extern Bool rfbAuthIsBlocked(void);


/* rre.c */

extern Bool rfbSendRectEncodingRRE(rfbClientPtr cl, int x, int y, int w,
                                   int h);


/* corre.c */

extern Bool rfbSendRectEncodingCoRRE(rfbClientPtr cl, int x, int y, int w,
                                     int h);


/* hextile.c */

extern Bool rfbSendRectEncodingHextile(rfbClientPtr cl, int x, int y, int w,
                                       int h);


/* zlib.c */

/* Minimum zlib rectangle size in bytes.  Anything smaller will
 * not compress well due to overhead.
 */
#define VNC_ENCODE_ZLIB_MIN_COMP_SIZE (17)

/* Set maximum zlib rectangle size in pixels.  Always allow at least
 * two scan lines.
 */
#define ZLIB_MAX_RECT_SIZE (128*256)
#define ZLIB_MAX_SIZE(min) ((( min * 2 ) > ZLIB_MAX_RECT_SIZE ) ? \
                            ( min * 2 ) : ZLIB_MAX_RECT_SIZE )

extern Bool rfbSendRectEncodingZlib(rfbClientPtr cl, int x, int y, int w,
                                    int h);


/* zrle.c */
extern Bool rfbSendRectEncodingZRLE(rfbClientPtr cl, int x, int y, int w,
                                    int h);
void rfbFreeZrleData(rfbClientPtr cl);


/* tight.c */

#define TVNC_SAMPOPT 4
enum { TVNC_1X = 0, TVNC_4X, TVNC_2X, TVNC_GRAY };
#define TIGHT_DEFAULT_COMPRESSION  1
#define TIGHT_DEFAULT_SUBSAMP      TVNC_1X
#define TIGHT_DEFAULT_QUALITY      95

extern int rfbNumCodedRectsTight(rfbClientPtr cl, int x, int y, int w, int h);
extern Bool rfbSendRectEncodingTight(rfbClientPtr cl, int x, int y, int w,
                                     int h);
extern int rfbTightCompressLevel(rfbClientPtr cl);
extern void ShutdownTightThreads(void);


/* cursor.c */

extern Bool rfbSendCursorShape(rfbClientPtr cl, ScreenPtr pScreen);
extern Bool rfbSendCursorPos(rfbClientPtr cl, ScreenPtr pScreen);


/* stats.c */

extern void rfbResetStats(rfbClientPtr cl);
extern void rfbPrintStats(rfbClientPtr cl);


#endif /* __RFB_H__ */
