rfbproto.h

teamviewer source code vc++

/*
//  Copyright (C) 2006 Teamviewer GmbH. All Rights Reserved.
//  Copyright (C) 2002 Ultr@VNC Team Members. All Rights Reserved.
//  Copyright (C) 2000-2002 Const Kaplinsky. All Rights Reserved.
 *  Copyright (C) 2002 RealVNC Ltd.  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 *  USA.
 */

/*
 * rfbproto.h - header file for the RFB protocol version 3.3
 *
 * Uses types CARD<n> for an n-bit unsigned integer, INT<n> for an n-bit signed
 * integer (for n = 8, 16 and 32).
 *
 * All multiple byte integers are in big endian (network) order (most
 * significant byte first).  Unless noted otherwise there is no special
 * alignment of protocol structures.
 *
 *
 * Once the initial handshaking is done, all messages start with a type byte,
 * (usually) followed by message-specific data.  The order of definitions in
 * this file is as follows:
 *
 *  (1) Structures used in several types of message.
 *  (2) Structures used in the initial handshaking.
 *  (3) Message types.
 *  (4) Encoding types.
 *  (5) For each message type, the form of the data following the type byte.
 *      Sometimes this is defined by a single structure but the more complex
 *      messages have to be explained by comments.
 */


/*****************************************************************************
 *
 * Structures used in several messages
 *
 *****************************************************************************/

/*-----------------------------------------------------------------------------
 * Structure used to specify a rectangle.  This structure is a multiple of 4
 * bytes so that it can be interspersed with 32-bit pixel data without
 * affecting alignment.
 */

typedef struct {
    CARD16 x;
    CARD16 y;
    CARD16 w;
    CARD16 h;
} rfbRectangle;

#define sz_rfbRectangle 8


/*-----------------------------------------------------------------------------
 * Structure used to specify pixel format.
 */

typedef struct {

    CARD8 bitsPerPixel;		/* 8,16,32 only */

    CARD8 depth;		/* 8 to 32 */

    CARD8 bigEndian;		/* True if multi-byte pixels are interpreted
				   as big endian, or if single-bit-per-pixel
				   has most significant bit of the byte
				   corresponding to first (leftmost) pixel. Of
				   course this is meaningless for 8 bits/pix */

    CARD8 trueColour;		/* If false then we need a "colour map" to
				   convert pixels to RGB.  If true, xxxMax and
				   xxxShift specify bits used for red, green
				   and blue */

    /* the following fields are only meaningful if trueColour is true */

    CARD16 redMax;		/* maximum red value (= 2^n - 1 where n is the
				   number of bits used for red). Note this
				   value is always in big endian order. */

    CARD16 greenMax;		/* similar for green */

    CARD16 blueMax;		/* and blue */

    CARD8 redShift;		/* number of shifts needed to get the red
				   value in a pixel to the least significant
				   bit. To find the red value from a given
				   pixel, do the following:
				   1) Swap pixel value according to bigEndian
				      (e.g. if bigEndian is false and host byte
				      order is big endian, then swap).
				   2) Shift right by redShift.
				   3) AND with redMax (in host byte order).
				   4) You now have the red value between 0 and
				      redMax. */

    CARD8 greenShift;		/* similar for green */

    CARD8 blueShift;		/* and blue */

    CARD8 pad1;
    CARD16 pad2;

} rfbPixelFormat;

#define sz_rfbPixelFormat 16

// Color settings values
#define rfbPFFullColors		0
#define rfbPF256Colors		1
#define rfbPF64Colors		2
#define rfbPF8Colors		3
#define rfbPF8GreyColors	4
#define rfbPF4GreyColors	5
#define rfbPF2GreyColors	6


/*****************************************************************************
 *
 * Initial handshaking messages
 *
 *****************************************************************************/

/*-----------------------------------------------------------------------------
 * Protocol Version
 *
 * The server always sends 12 bytes to start which identifies the latest RFB
 * protocol version number which it supports.  These bytes are interpreted
 * as a string of 12 ASCII characters in the format "RFB xxx.yyy\n" where
 * xxx and yyy are the major and minor version numbers (for version 3.3
 * this is "RFB 003.003\n").
 *
 * The client then replies with a similar 12-byte message giving the version
 * number of the protocol which should actually be used (which may be different
 * to that quoted by the server).
 *
 * It is intended that both clients and servers may provide some level of
 * backwards compatibility by this mechanism.  Servers in particular should
 * attempt to provide backwards compatibility, and even forwards compatibility
 * to some extent.  For example if a client demands version 3.1 of the
 * protocol, a 3.0 server can probably assume that by ignoring requests for
 * encoding types it doesn't understand, everything will still work OK.  This
 * will probably not be the case for changes in the major version number.
 *
 * The format string below can be used in sprintf or sscanf to generate or
 * decode the version string respectively.
 */

#define rfbProtocolVersionFormat "RFB %03d.%03d\n"
#define rfbProtocolMajorVersion 3
#define rfbProtocolMinorVersion 234 /* 4 and 6 = UltraVNC, 5 = TightVNC
				With the beginning of the TeamViewer project we used MinorVersion 14 and 16.
				Then UltraVNC started using 14 and 16 for UltraSC, so we decided to switch 
				to the higher numbers 34 and 36.	

				For now we have tried to use backward compatibility to the older TeamViewer releases,
				later, when hopefully most users of old TeamViewers have switched to new ones,
				we will make our version compatible to UltraVNC
			*/

typedef char rfbProtocolVersionMsg[13];	/* allow extra byte for null */

#define sz_rfbProtocolVersionMsg 12


/*-----------------------------------------------------------------------------
 * Authentication
 *
 * Once the protocol version has been decided, the server then sends a 32-bit
 * word indicating whether any authentication is needed on the connection.
 * The value of this word determines the authentication scheme in use.  For
 * version 3.0 of the protocol this may have one of the following values:
 */

#define rfbConnFailed 0
#define rfbNoAuth 1
#define rfbVncAuth 2

/*
 * rfbConnFailed:	For some reason the connection failed (e.g. the server
 *			cannot support the desired protocol version).  This is
 *			followed by a string describing the reason (where a
 *			string is specified as a 32-bit length followed by that
 *			many ASCII characters).
 *
 * rfbNoAuth:		No authentication is needed.
 *
 * rfbVncAuth:		The VNC authentication scheme is to be used.  A 16-byte
 *			challenge follows, which the client encrypts as
 *			appropriate using the password and sends the resulting
 *			16-byte response.  If the response is correct, the
 *			server sends the 32-bit word rfbVncAuthOK.  If a simple
 *			failure happens, the server sends rfbVncAuthFailed and
 *			closes the connection. If the server decides that too
 *			many failures have occurred, it sends rfbVncAuthTooMany
 *			and closes the connection.  In the latter case, the
 *			server should not allow an immediate reconnection by
 *			the client.
 */

#define rfbVncAuthOK 0
#define rfbVncAuthFailed 1
#define rfbVncAuthTooMany 2


/*-----------------------------------------------------------------------------
 * Client Initialisation Message
 *
 * Once the client and server are sure that they're happy to talk to one
 * another, the client sends an initialisation message.  At present this
 * message only consists of a boolean indicating whether the server should try
 * to share the desktop by leaving other clients connected, or give exclusive
 * access to this client by disconnecting all other clients.
 */

typedef struct {
    CARD8 shared;
} rfbClientInitMsg;

#define sz_rfbClientInitMsg 1


/*-----------------------------------------------------------------------------
 * Server Initialisation Message
 *
 * After the client initialisation message, the server sends one of its own.
 * This tells the client the width and height of the server's framebuffer,
 * its pixel format and the name associated with the desktop.
 */

typedef struct {
    CARD16 framebufferWidth;
    CARD16 framebufferHeight;
    rfbPixelFormat format;	/* the server's preferred pixel format */
    CARD32 nameLength;
    /* followed by char name[nameLength] */
} rfbServerInitMsg;

#define sz_rfbServerInitMsg (8 + sz_rfbPixelFormat)


/*
 * Following the server initialisation message it's up to the client to send
 * whichever protocol messages it wants.  Typically it will send a
 * SetPixelFormat message and a SetEncodings message, followed by a
 * FramebufferUpdateRequest.  From then on the server will send
 * FramebufferUpdate messages in response to the client's
 * FramebufferUpdateRequest messages.  The client should send
 * FramebufferUpdateRequest messages with incremental set to true when it has
 * finished processing one FramebufferUpdate and is ready to process another.
 * With a fast client, the rate at which FramebufferUpdateRequests are sent
 * should be regulated to avoid hogging the network.
 */



/*****************************************************************************
 *
 * Message types
 *
 *****************************************************************************/

/* both directions server->client AND client->server */

#define rfbModeChangeRequest  140  // Request a switch of display mode
#define rfbModeChange		  141  // The confirmation 

/* server -> client */

#define rfbFramebufferUpdate 0
#define rfbSetColourMapEntries 1
#define rfbBell 2
#define rfbServerCutText 3
#define rfbResizeFrameBuffer 4 // Modif sf@2002 
//Modif cs@2005
#ifdef DSHOW
#define rfbKeyFrameUpdate 5
#endif
#define rfbPalmVNCReSizeFrameBuffer 0xF
// reserved: 140/141 (see above)
#define rfbSetDisplayDimensions 142   // Client should switch mode to fullscreen-display   TR@2004       NOT IMPLEMENTED YET!
#define rfbPleaseRequestFullUpdate  143   // Client should request Full Screenbuffer-Update  TR@2003

/* client -> server */

#define rfbSetPixelFormat 0
#define rfbFixColourMapEntries 1	/* not currently supported */
#define rfbSetEncodings 2
#define rfbFramebufferUpdateRequest 3
#define rfbKeyEvent 4
#define rfbPointerEvent 5
#define rfbClientCutText 6
#define rfbFileTransfer 7     // Modif sf@2002 - actually bidirectionnal
#define rfbSetScale 8 // Modif sf@2002
#define rfbSetServerInput	9 // Modif rdv@2002
#define rfbSetSW	10// Modif rdv@2002
#define rfbTextChat	11// Modif sf@2002 - TextChat - Bidirectionnal
//Modif cs@2005
#ifdef DSHOW
#define rfbKeyFrameRequest 12
#endif
#define rfbPalmVNCSetScaleFactor 0xF // PalmVNC 1.4 & 2.0 SetScale Factor message
// reserved: 140/141 (see above)
#define rfbDisplayDimensions  142 // Client tells its screen dimensions to server  TR@2004      NOT IMPLEMENTED YET!

#define rfbTeamviewerInfo 144

/*****************************************************************************
 *
 * Encoding types
 *
 *****************************************************************************/

#define rfbEncodingRaw 0
#define rfbEncodingCopyRect 1
#define rfbEncodingRRE 2
#define rfbEncodingCoRRE 4
#define rfbEncodingHextile 5
#define rfbEncodingZlib    6
#define rfbEncodingTight   7
#define rfbEncodingZlibHex 8
#define rfbEncodingUltra	9
#define rfbEncodingZRLE 16

// Cache & XOR-Zlib - rdv@2002
#define rfbEncodingCache					0xFFFF0000
#define rfbEncodingCacheEnable				0xFFFF0001
#define rfbEncodingXOR_Zlib					0xFFFF0002
#define rfbEncodingXORMonoColor_Zlib		0xFFFF0003
#define rfbEncodingXORMultiColor_Zlib		0xFFFF0004
#define rfbEncodingSolidColor				0xFFFF0005
#define rfbEncodingXOREnable				0xFFFF0006
#define rfbEncodingCacheZip					0xFFFF0007
#define rfbEncodingSolMonoZip				0xFFFF0008
#define rfbEncodingUltraZip				0xFFFF0009


// Same encoder number as in tight 
/*
#define rfbEncodingXCursor         0xFFFFFF10
#define rfbEncodingRichCursor      0xFFFFFF11
#define rfbEncodingNewFBSize       0xFFFFFF21
*/

/*
 *  Tight Special encoding numbers:
 *   0xFFFFFF00 .. 0xFFFFFF0F -- encoding-specific compression levels;
 *   0xFFFFFF10 .. 0xFFFFFF1F -- mouse cursor shape data;
 *   0xFFFFFF20 .. 0xFFFFFF2F -- various protocol extensions;
 *   0xFFFFFF30 .. 0xFFFFFFDF -- not allocated yet;
 *   0xFFFFFFE0 .. 0xFFFFFFEF -- quality level for JPEG compressor;
 *   0xFFFFFFF0 .. 0xFFFFFFFF -- cross-encoding compression levels.
 */

#define rfbEncodingCompressLevel0  0xFFFFFF00
#define rfbEncodingCompressLevel1  0xFFFFFF01
#define rfbEncodingCompressLevel2  0xFFFFFF02
#define rfbEncodingCompressLevel3  0xFFFFFF03
#define rfbEncodingCompressLevel4  0xFFFFFF04
#define rfbEncodingCompressLevel5  0xFFFFFF05
#define rfbEncodingCompressLevel6  0xFFFFFF06
#define rfbEncodingCompressLevel7  0xFFFFFF07
#define rfbEncodingCompressLevel8  0xFFFFFF08
#define rfbEncodingCompressLevel9  0xFFFFFF09

#define rfbEncodingXCursor         0xFFFFFF10
#define rfbEncodingRichCursor      0xFFFFFF11
#define rfbEncodingLastRect        0xFFFFFF20
#define rfbEncodingNewFBSize       0xFFFFFF21
 
#define rfbEncodingQualityLevel0   0xFFFFFFE0
#define rfbEncodingQualityLevel1   0xFFFFFFE1
#define rfbEncodingQualityLevel2   0xFFFFFFE2
#define rfbEncodingQualityLevel3   0xFFFFFFE3
#define rfbEncodingQualityLevel4   0xFFFFFFE4
#define rfbEncodingQualityLevel5   0xFFFFFFE5
#define rfbEncodingQualityLevel6   0xFFFFFFE6
#define rfbEncodingQualityLevel7   0xFFFFFFE7
#define rfbEncodingQualityLevel8   0xFFFFFFE8
#define rfbEncodingQualityLevel9   0xFFFFFFE9



/*****************************************************************************
 *
 * Server -> client message definitions
 *
 *****************************************************************************/

/*-----------------------------------------------------------------------------