/nx-3.5.0/nx-X11/programs/Xserver/hw/nxagent/X/NXdispatch.c

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/**************************************************************************/
/*                                                                        */
/* Copyright (c) 2001, 2011 NoMachine, http://www.nomachine.com/.         */
/*                                                                        */
/* NXAGENT, NX protocol compression and NX extensions to this software    */
/* are copyright of NoMachine. Redistribution and use of the present      */
/* software is allowed according to terms specified in the file LICENSE   */
/* which comes in the source distribution.                                */
/*                                                                        */
/* Check http://www.nomachine.com/licensing.html for applicability.       */
/*                                                                        */
/* NX and NoMachine are trademarks of Medialogic S.p.A.                   */
/*                                                                        */
/* All rights reserved.                                                   */
/*                                                                        */
/**************************************************************************/

/* $XdotOrg: xc/programs/Xserver/dix/dispatch.c,v 1.13 2005/09/13 01:33:19 daniels Exp $ */
/* $Xorg: dispatch.c,v 1.5 2001/02/09 02:04:40 xorgcvs Exp $ */
/************************************************************

Copyright 1987, 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.


Copyright 1987, 1989 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

********************************************************/

/* The panoramix components contained the following notice */
/*****************************************************************

Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING,
BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of Digital Equipment Corporation
shall not be used in advertising or otherwise to promote the sale, use or other
dealings in this Software without prior written authorization from Digital
Equipment Corporation.

******************************************************************/

/* $XFree86: xc/programs/Xserver/dix/dispatch.c,v 3.32 2003/11/10 18:21:45 tsi Exp $ */

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

#ifdef PANORAMIX_DEBUG
#include <stdio.h>
int ProcInitialConnection();
#endif

#ifdef __sun
#define False 0
#define True 1
#endif

#define GC XlibGC
#include <X11/Xlib.h>
#undef GC

#include "windowstr.h"
#include <X11/fonts/fontstruct.h>
#include "dixfontstr.h"
#include "gcstruct.h"
#include "selection.h"
#include "colormapst.h"
#include "cursorstr.h"
#include "scrnintstr.h"
#include "opaque.h"
#include "input.h"
#include "servermd.h"
#include "extnsionst.h"
#include "dixfont.h"
#include "../../dix/dispatch.h"
#include "swaprep.h"
#include "swapreq.h"
#ifdef PANORAMIX
#include "panoramiX.h"
#include "panoramiXsrv.h"
#endif
#ifdef XCSECURITY
#define _SECURITY_SERVER
#include <X11/extensions/security.h>
#endif
#ifdef XAPPGROUP
#include <X11/extensions/Xagsrv.h>
#endif
#ifdef XKB
#define XKB_IN_SERVER
#include "inputstr.h"
#include <X11/extensions/XKBsrv.h>
#endif

#include "Atoms.h"
#include "Splash.h"
#include "Client.h"
#include "Clipboard.h"
#include "Reconnect.h"
#include "Millis.h"
#include "Font.h"
#include "Shadow.h"
#include "Handlers.h"
#include "Keyboard.h"

const int nxagentMaxFontNames = 10000;

char dispatchExceptionAtReset = DE_RESET;

/*
 * This allows the agent to exit if no
 * client is connected within a timeout.
 */

int nxagentClients = 0;

void nxagentWaitDisplay(void);

void nxagentListRemoteFonts(const char *, int);

unsigned int nxagentWMtimeout = 0;
Bool         nxagentWMPassed  = 0;

/*
 * Timeouts based on screen saver time.
 */

int nxagentAutoDisconnectTimeout = 0;

#ifdef LBX
#include "../../lbx/lbxserve.h"
#endif

#include "Xatom.h"

/*
 * Set here the required log level.
 */

#define PANIC
#define WARNING
#undef  TEST
#undef  WATCH

/*
 * Log begin and end of the important handlers.
 */

#undef  BLOCKS

#ifdef WATCH
#include "unistd.h"
#endif

#ifdef TEST
#include "Literals.h"
#endif

#define mskcnt ((MAXCLIENTS + 31) / 32)
#define BITMASK(i) (1U << ((i) & 31))
#define MASKIDX(i) ((i) >> 5)
#define MASKWORD(buf, i) buf[MASKIDX(i)]
#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))

extern xConnSetupPrefix connSetupPrefix;
extern char *ConnectionInfo;

Selection *CurrentSelections;
int NumCurrentSelections;
CallbackListPtr SelectionCallback = NULL;

#ifdef VIEWPORT_FRAME

extern WindowPtr nxagentViewportFrameLeft;
extern WindowPtr nxagentViewportFrameRight;
extern WindowPtr nxagentViewportFrameAbove;
extern WindowPtr nxagentViewportFrameBelow;

#define IsViewportFrame(pWin) ((pWin) == nxagentViewportFrameLeft || \
                                   (pWin) == nxagentViewportFrameRight || \
                                       (pWin) == nxagentViewportFrameAbove || \
                                           (pWin) == nxagentViewportFrameBelow)

#else

#define IsViewportFrame(pWin) (0)

#endif /* #ifdef VIEWPORT_FRAME */

extern int nxagentMaxAllowedResets;

extern int nxagentFindClientResource(int, RESTYPE, pointer);

static ClientPtr grabClient;
#define GrabNone 0
#define GrabActive 1
#define GrabKickout 2
static int grabState = GrabNone;
static long grabWaiters[mskcnt];
CallbackListPtr ServerGrabCallback = NULL;
HWEventQueuePtr checkForInput[2];
extern int connBlockScreenStart;

static void KillAllClients(void);

static void DeleteClientFromAnySelections(ClientPtr client);

static int nextFreeClientID; /* always MIN free client ID */

static int	nClients;	/* number of authorized clients */

CallbackListPtr ClientStateCallback;

/* dispatchException & isItTimeToYield must be declared volatile since they
 * are modified by signal handlers - otherwise optimizer may assume it doesn't
 * need to actually check value in memory when used and may miss changes from
 * signal handlers.
 */
volatile char dispatchException = 0;
volatile char isItTimeToYield;

/* Various of the DIX function interfaces were not designed to allow
 * the client->errorValue to be set on BadValue and other errors.
 * Rather than changing interfaces and breaking untold code we introduce
 * a new global that dispatch can use.
 */
XID clientErrorValue;   /* XXX this is a kludge */

#define SAME_SCREENS(a, b) (\
    (a.pScreen == b.pScreen))

void
SetInputCheck(HWEventQueuePtr c0, HWEventQueuePtr c1)
{
    checkForInput[0] = c0;
    checkForInput[1] = c1;
}

void
UpdateCurrentTime()
{
    TimeStamp systime;

    /* To avoid time running backwards, we must call GetTimeInMillis before
     * calling ProcessInputEvents.
     */
    systime.months = currentTime.months;
    systime.milliseconds = GetTimeInMillis();
    if (systime.milliseconds < currentTime.milliseconds)
	systime.months++;
    if (*checkForInput[0] != *checkForInput[1])
	ProcessInputEvents();
    if (CompareTimeStamps(systime, currentTime) == LATER)
	currentTime = systime;
}

/* Like UpdateCurrentTime, but can't call ProcessInputEvents */
void
UpdateCurrentTimeIf()
{
    TimeStamp systime;

    systime.months = currentTime.months;
    systime.milliseconds = GetTimeInMillis();
    if (systime.milliseconds < currentTime.milliseconds)
	systime.months++;
    if (*checkForInput[0] == *checkForInput[1])
	currentTime = systime;
}

void
InitSelections()
{
    if (CurrentSelections)
	xfree(CurrentSelections);
    CurrentSelections = (Selection *)NULL;
    NumCurrentSelections = 0;

#ifdef NXAGENT_CLIPBOARD
    {
      Selection *newsels;
      newsels = (Selection *)xalloc(2 * sizeof(Selection));
      if (!newsels)
        return;
      NumCurrentSelections += 2;
      CurrentSelections = newsels;

      CurrentSelections[0].selection = XA_PRIMARY;
      CurrentSelections[0].lastTimeChanged = ClientTimeToServerTime(0);
      CurrentSelections[0].window = WindowTable[0]->drawable.id;
      CurrentSelections[0].pWin = NULL;
      CurrentSelections[0].client = NullClient;

      CurrentSelections[1].selection = MakeAtom("CLIPBOARD", 9, 1);
      CurrentSelections[1].lastTimeChanged = ClientTimeToServerTime(0);
      CurrentSelections[1].window = WindowTable[0]->drawable.id;
      CurrentSelections[1].pWin = NULL;
      CurrentSelections[1].client = NullClient;
    }
#endif

}

void 
FlushClientCaches(XID id)
{
    int i;
    register ClientPtr client;

    client = clients[CLIENT_ID(id)];
    if (client == NullClient)
        return ;
    for (i=0; i<currentMaxClients; i++)
    {
	client = clients[i];
        if (client != NullClient)
	{
            if (client->lastDrawableID == id)
	    {
		client->lastDrawableID = WindowTable[0]->drawable.id;
		client->lastDrawable = (DrawablePtr)WindowTable[0];
	    }
            else if (client->lastGCID == id)
	    {
                client->lastGCID = INVALID;
		client->lastGC = (GCPtr)NULL;
	    }
	}
    }
}
#ifdef SMART_SCHEDULE

#undef SMART_DEBUG

#define SMART_SCHEDULE_DEFAULT_INTERVAL	20	    /* ms */
#define SMART_SCHEDULE_MAX_SLICE	200	    /* ms */

Bool	    SmartScheduleDisable = FALSE;
long	    SmartScheduleSlice = SMART_SCHEDULE_DEFAULT_INTERVAL;
long	    SmartScheduleInterval = SMART_SCHEDULE_DEFAULT_INTERVAL;
long	    SmartScheduleMaxSlice = SMART_SCHEDULE_MAX_SLICE;
long	    SmartScheduleTime;
ClientPtr   SmartLastClient;
int	    SmartLastIndex[SMART_MAX_PRIORITY-SMART_MIN_PRIORITY+1];
int         SmartScheduleClient(int *clientReady, int nready);

#ifdef SMART_DEBUG
long	    SmartLastPrint;
#endif

void        Dispatch(void);
void        InitProcVectors(void);

int
SmartScheduleClient (int *clientReady, int nready)
{
    ClientPtr	pClient;
    int		i;
    int		client;
    int		bestPrio, best = 0;
    int		bestRobin, robin;
    long	now = SmartScheduleTime;
    long	idle;

    bestPrio = -0x7fffffff;
    bestRobin = 0;
    idle = 2 * SmartScheduleSlice;
    for (i = 0; i < nready; i++)
    {
	client = clientReady[i];
	pClient = clients[client];
	/* Praise clients which are idle */
	if ((now - pClient->smart_check_tick) >= idle)
	{
	    if (pClient->smart_priority < 0)
		pClient->smart_priority++;
	}
	pClient->smart_check_tick = now;
	
	/* check priority to select best client */
	robin = (pClient->index - SmartLastIndex[pClient->smart_priority-SMART_MIN_PRIORITY]) & 0xff;
	if (pClient->smart_priority > bestPrio ||
	    (pClient->smart_priority == bestPrio && robin > bestRobin))
	{
	    bestPrio = pClient->smart_priority;
	    bestRobin = robin;
	    best = client;
	}
#ifdef SMART_DEBUG
	if ((now - SmartLastPrint) >= 5000)
	    fprintf (stderr, " %2d: %3d", client, pClient->smart_priority);
#endif
    }
#ifdef SMART_DEBUG
    if ((now - SmartLastPrint) >= 5000)
    {
	fprintf (stderr, " use %2d\n", best);
	SmartLastPrint = now;
    }
#endif
    pClient = clients[best];
    SmartLastIndex[bestPrio-SMART_MIN_PRIORITY] = pClient->index;
    /*
     * Set current client pointer
     */
    if (SmartLastClient != pClient)
    {
	pClient->smart_start_tick = now;
	SmartLastClient = pClient;
    }
    /*
     * Adjust slice
     */
    if (nready == 1)
    {
	/*
	 * If it's been a long time since another client
	 * has run, bump the slice up to get maximal
	 * performance from a single client
	 */
	if ((now - pClient->smart_start_tick) > 1000 &&
	    SmartScheduleSlice < SmartScheduleMaxSlice)
	{
	    SmartScheduleSlice += SmartScheduleInterval;
	}
    }
    else
    {
	SmartScheduleSlice = SmartScheduleInterval;
    }
    return best;
}
#endif

#define MAJOROP ((xReq *)client->requestBuffer)->reqType

void
Dispatch(void)
{
    register int        *clientReady;     /* array of request ready clients */
    register int	result;
    register ClientPtr	client;
    register int	nready;
    register HWEventQueuePtr* icheck = checkForInput;
#ifdef SMART_SCHEDULE
    long			start_tick;
#endif

    unsigned long currentDispatch = 0;

    nextFreeClientID = 1;
    InitSelections();
    nClients = 0;

    /*
     * The agent initialization was successfully
     * completed. We can now handle our clients.
     */

    #ifdef XKB

    nxagentInitXkbWrapper();

    nxagentTuneXkbWrapper();

    #endif

    #ifdef NXAGENT_ONSTART

    /*
     * Set NX_WM property (used by NX client to identify
     * the agent's window) three seconds since the first
     * client connects.
     */

    nxagentWMtimeout = GetTimeInMillis() + 3000;

    #endif

    clientReady = (int *) ALLOCATE_LOCAL(sizeof(int) * MaxClients);
    if (!clientReady)
	return;

  #ifdef WATCH

  fprintf(stderr, "Dispatch: Watchpoint 12.\n");

/*
Reply   Total	Cached	Bits In			Bits Out		Bits/Reply	  Ratio
------- -----	------	-------			--------		----------	  -----
#3      1		352 bits (0 KB) ->	236 bits (0 KB) ->	352/1 -> 236/1	= 1.492:1
#14     1		256 bits (0 KB) ->	101 bits (0 KB) ->	256/1 -> 101/1	= 2.535:1
#16     1		256 bits (0 KB) ->	26 bits (0 KB) ->	256/1 -> 26/1	= 9.846:1
#20     2	2	12256 bits (1 KB) ->	56 bits (0 KB) ->	6128/1 -> 28/1	= 218.857:1
#43     1		256 bits (0 KB) ->	45 bits (0 KB) ->	256/1 -> 45/1	= 5.689:1
#47     2	2	42304 bits (5 KB) ->	49 bits (0 KB) ->	21152/1 -> 24/1	= 863.347:1
#98     1		256 bits (0 KB) ->	34 bits (0 KB) ->	256/1 -> 34/1	= 7.529:1
*/

  sleep(30);

  #endif

  #ifdef TEST
  fprintf(stderr, "Dispatch: Value of dispatchException is [%x].\n",
              dispatchException);

  fprintf(stderr, "Dispatch: Value of dispatchExceptionAtReset is [%x].\n",
              dispatchExceptionAtReset);
  #endif

  if (!(dispatchException & DE_TERMINATE))
    dispatchException = 0;

    while (!dispatchException)
    {
        if (*icheck[0] != *icheck[1])
	{
	    ProcessInputEvents();
	    FlushIfCriticalOutputPending();
	}

        /*
         * Ensure we remove the splash after the timeout.
         * Initializing clientReady[0] to -1 will tell
         * WaitForSomething() to yield control after the
         * timeout set in clientReady[1].
         */

        clientReady[0] = 0;

        if (nxagentSplashWindow != None || (nxagentOption(Xdmcp) == 1 && nxagentXdmcpUp == 0))
        {
          #ifdef TEST
          fprintf(stderr, "******Dispatch: Requesting a timeout of [%d] Ms.\n",
                      NXAGENT_WAKEUP);
          #endif

          clientReady[0] = -1;
          clientReady[1] = NXAGENT_WAKEUP;
        }

        if (serverGeneration > nxagentMaxAllowedResets &&
                nxagentSessionState == SESSION_STARTING &&
                    (nxagentOption(Xdmcp) == 0 || nxagentXdmcpUp == 1))
        {
          #ifdef NX_DEBUG_INPUT
          fprintf(stderr, "Session: Session started at '%s' timestamp [%lu].\n",
                      GetTimeAsString(), GetTimeInMillis());
          #else
          fprintf(stderr, "Session: Session started at '%s'.\n",
                      GetTimeAsString());
          #endif

          nxagentSessionState = SESSION_UP;
        }

        #ifdef BLOCKS
        fprintf(stderr, "[End dispatch]\n");
        #endif

	nready = WaitForSomething(clientReady);

        #ifdef BLOCKS
        fprintf(stderr, "[Begin dispatch]\n");
        #endif

        #ifdef TEST
        fprintf(stderr, "******Dispatch: Running with [%d] clients ready.\n",
                    nready);
        #endif
        
        #ifdef NXAGENT_ONSTART

        currentDispatch = GetTimeInMillis();

        /*
         * If the timeout is expired set the
         * selection informing the NX client
         * that the agent is ready.
         */

         if (!nxagentWMPassed && (nxagentWMtimeout < currentDispatch))
         {
           nxagentRemoveSplashWindow(NULL);
         }

         nxagentClients = nClients;

         #endif

#ifdef SMART_SCHEDULE
	if (nready && !SmartScheduleDisable)
	{
	    clientReady[0] = SmartScheduleClient (clientReady, nready);
	    nready = 1;
	}
#endif
       /***************** 
	*  Handle events in round robin fashion, doing input between 
	*  each round 
	*****************/

	while (!dispatchException && (--nready >= 0))
	{
	    client = clients[clientReady[nready]];
	    if (! client)
	    {
		/* KillClient can cause this to happen */
		continue;
	    }
	    /* GrabServer activation can cause this to be true */
	    if (grabState == GrabKickout)
	    {
		grabState = GrabActive;
		break;
	    }
	    isItTimeToYield = FALSE;
 
            requestingClient = client;
#ifdef SMART_SCHEDULE
	    start_tick = SmartScheduleTime;
#endif
	    while (!isItTimeToYield)
	    {
	        if (*icheck[0] != *icheck[1])
		{
		    ProcessInputEvents();
		    FlushIfCriticalOutputPending();
		}
#ifdef SMART_SCHEDULE
		if (!SmartScheduleDisable && 
		    (SmartScheduleTime - start_tick) >= SmartScheduleSlice)
		{
		    /* Penalize clients which consume ticks */
		    if (client->smart_priority > SMART_MIN_PRIORITY)
			client->smart_priority--;
		    break;
		}
#endif
		/* now, finally, deal with client requests */

                #ifdef TEST
                fprintf(stderr, "******Dispatch: Reading request from client [%d].\n",
                            client->index);
                #endif

	        result = ReadRequestFromClient(client);
	        if (result <= 0) 
	        {
		    if (result < 0)
			CloseDownClient(client);
		    break;
	        }
#ifdef NXAGENT_SERVER

                #ifdef TEST

                else
                {

                    if (MAJOROP > 127)
                    {
                      fprintf(stderr, "******Dispatch: Read [Extension] request OPCODE#%d MINOR#%d "
                                  "size [%d] client [%d].\n", MAJOROP, *((char *) client->requestBuffer + 1),
                                      client->req_len << 2, client->index);
                    }
                    else
                    {
                      fprintf(stderr, "******Dispatch: Read [%s] request OPCODE#%d size [%d] client [%d].\n",
                                  nxagentRequestLiteral[MAJOROP], MAJOROP, client->req_len << 2,
                                      client->index);
                    }
                }

                #endif
#endif

		client->sequence++;
#ifdef DEBUG
		if (client->requestLogIndex == MAX_REQUEST_LOG)
		    client->requestLogIndex = 0;
		client->requestLog[client->requestLogIndex] = MAJOROP;
		client->requestLogIndex++;
#endif
		if (result > (maxBigRequestSize << 2))
		    result = BadLength;
		else
#ifdef NXAGENT_SERVER
                {
                    result = (* client->requestVector[MAJOROP])(client);

                    #ifdef TEST

                    if (MAJOROP > 127)
                    {
                      fprintf(stderr, "******Dispatch: Handled [Extension] request OPCODE#%d MINOR#%d "
                                  "size [%d] client [%d] result [%d].\n", MAJOROP,
                                      *((char *) client->requestBuffer + 1), client->req_len << 2,
                                          client->index, result);
                    }
                    else
                    {
                      fprintf(stderr, "******Dispatch: Handled [%s] request OPCODE#%d size [%d] client [%d] "
                                  "result [%d].\n", nxagentRequestLiteral[MAJOROP], MAJOROP,
                                      client->req_len << 2, client->index, result);
                    }

                    #endif

                    /*
                     * Can set isItTimeToYield to force
                     * the dispatcher to pay attention
                     * to another client.
                     */

                    nxagentDispatchHandler(client, client->req_len << 2, 0);
                }
#else
		    result = (* client->requestVector[MAJOROP])(client);
#endif

		if (result != Success) 
		{
		    if (client->noClientException != Success)
                        CloseDownClient(client);
                    else
		        SendErrorToClient(client, MAJOROP,
					  MinorOpcodeOfRequest(client),
					  client->errorValue, result);
		    break;
	        }
#ifdef DAMAGEEXT
		FlushIfCriticalOutputPending ();
#endif
	    }
	    FlushAllOutput();
#ifdef SMART_SCHEDULE
	    client = clients[clientReady[nready]];
	    if (client)
		client->smart_stop_tick = SmartScheduleTime;
#endif
	    requestingClient = NULL;
	}
	dispatchException &= ~DE_PRIORITYCHANGE;
    }
#if defined(DDXBEFORERESET)
    ddxBeforeReset ();
#endif
    if ((dispatchException & DE_RESET) && 
            (serverGeneration > nxagentMaxAllowedResets))
    {
        dispatchException &= ~DE_RESET;
        dispatchException |= DE_TERMINATE;

        fprintf(stderr, "Info: Reached threshold of maximum allowed resets.\n");
    }

    nxagentResetAtomMap();

    if (serverGeneration > nxagentMaxAllowedResets)
    {
      /*
       * The session is terminating. Force an I/O
       * error on the display and wait until the
       * NX transport is gone.
       */
  
      fprintf(stderr, "Session: Terminating session at '%s'.\n", GetTimeAsString());

      nxagentWaitDisplay();

      fprintf(stderr, "Session: Session terminated at '%s'.\n", GetTimeAsString());
    }

    if (nxagentOption(Shadow) == 1)
    {
      NXShadowDestroy();
    }

    KillAllClients();
    DEALLOCATE_LOCAL(clientReady);
    dispatchException &= ~DE_RESET;
}

#undef MAJOROP

int
ProcBadRequest(ClientPtr client)
{
    return (BadRequest);
}

int
ProcCreateWindow(ClientPtr client)
{
    register WindowPtr pParent, pWin;
    REQUEST(xCreateWindowReq);
    int result;
    int len;

    REQUEST_AT_LEAST_SIZE(xCreateWindowReq);
    
    LEGAL_NEW_RESOURCE(stuff->wid, client);
    if (!(pParent = (WindowPtr)SecurityLookupWindow(stuff->parent, client,
						    SecurityWriteAccess)))
        return BadWindow;
    len = client->req_len - (sizeof(xCreateWindowReq) >> 2);
    if (Ones(stuff->mask) != len)
        return BadLength;
    if (!stuff->width || !stuff->height)
    {
	client->errorValue = 0;
        return BadValue;
    }
    pWin = CreateWindow(stuff->wid, pParent, stuff->x,
			      stuff->y, stuff->width, stuff->height, 
			      stuff->borderWidth, stuff->class,
			      stuff->mask, (XID *) &stuff[1], 
			      (int)stuff->depth, 
			      client, stuff->visual, &result);
    if (pWin)
    {
	Mask mask = pWin->eventMask;

	pWin->eventMask = 0; /* subterfuge in case AddResource fails */
	if (!AddResource(stuff->wid, RT_WINDOW, (pointer)pWin))
	    return BadAlloc;
	pWin->eventMask = mask;
    }
    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcChangeWindowAttributes(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xChangeWindowAttributesReq);
    register int result;
    int len;

    REQUEST_AT_LEAST_SIZE(xChangeWindowAttributesReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    len = client->req_len - (sizeof(xChangeWindowAttributesReq) >> 2);
    if (len != Ones(stuff->valueMask))
        return BadLength;
    result =  ChangeWindowAttributes(pWin, 
				  stuff->valueMask, 
				  (XID *) &stuff[1], 
				  client);
    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcGetWindowAttributes(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);
    xGetWindowAttributesReply wa;

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    GetWindowAttributes(pWin, client, &wa);
    WriteReplyToClient(client, sizeof(xGetWindowAttributesReply), &wa);
    return(client->noClientException);
}

int
ProcDestroyWindow(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
					   SecurityDestroyAccess);
    if (!pWin)
        return(BadWindow);
    if (pWin->parent)
	FreeResource(stuff->id, RT_NONE);
    return(client->noClientException);
}

int
ProcDestroySubwindows(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
					   SecurityDestroyAccess);
    if (!pWin)
        return(BadWindow);
    DestroySubwindows(pWin, client);
    return(client->noClientException);
}

int
ProcChangeSaveSet(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xChangeSaveSetReq);
    register int result;
		  
    REQUEST_SIZE_MATCH(xChangeSaveSetReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    if (client->clientAsMask == (CLIENT_BITS(pWin->drawable.id)))
        return BadMatch;
    if ((stuff->mode == SetModeInsert) || (stuff->mode == SetModeDelete))
    {
        result = AlterSaveSetForClient(client, pWin, stuff->mode, FALSE, TRUE);
	if (client->noClientException != Success)
	    return(client->noClientException);
	else
            return(result);
    }
    else
    {
	client->errorValue = stuff->mode;
	return( BadValue );
    }
}

int
ProcReparentWindow(register ClientPtr client)
{
    register WindowPtr pWin, pParent;
    REQUEST(xReparentWindowReq);
    register int result;

    REQUEST_SIZE_MATCH(xReparentWindowReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);

    if (!nxagentWMPassed)
    {
      nxagentRemoveSplashWindow(pWin);
    }

    pParent = (WindowPtr)SecurityLookupWindow(stuff->parent, client,
					      SecurityWriteAccess);
    if (!pParent)
        return(BadWindow);
    if (SAME_SCREENS(pWin->drawable, pParent->drawable))
    {
        if ((pWin->backgroundState == ParentRelative) &&
            (pParent->drawable.depth != pWin->drawable.depth))
            return BadMatch;
	if ((pWin->drawable.class != InputOnly) &&
	    (pParent->drawable.class == InputOnly))
	    return BadMatch;
        result =  ReparentWindow(pWin, pParent, 
			 (short)stuff->x, (short)stuff->y, client);
	if (client->noClientException != Success)
            return(client->noClientException);
	else
            return(result);
    }
    else 
        return (BadMatch);
}

int
ProcMapWindow(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    MapWindow(pWin, client);
           /* update cache to say it is mapped */
    return(client->noClientException);
}

int
ProcMapSubwindows(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->id, client,
					    SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    MapSubwindows(pWin, client);
           /* update cache to say it is mapped */
    return(client->noClientException);
}

int
ProcUnmapWindow(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->id, client,
					    SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    UnmapWindow(pWin, FALSE);
           /* update cache to say it is mapped */

    return(client->noClientException);
}

int
ProcUnmapSubwindows(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->id, client,
					    SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    UnmapSubwindows(pWin);
    return(client->noClientException);
}

int
ProcConfigureWindow(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xConfigureWindowReq);
    register int result;
    int len;

    REQUEST_AT_LEAST_SIZE(xConfigureWindowReq);
    pWin = (WindowPtr)SecurityLookupWindow( stuff->window, client,
					    SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    len = client->req_len - (sizeof(xConfigureWindowReq) >> 2);
    if (Ones((Mask)stuff->mask) != len)
        return BadLength;
    result =  ConfigureWindow(pWin, (Mask)stuff->mask, (XID *) &stuff[1], 
			      client);

    if (client->noClientException != Success)
        return(client->noClientException);
    else
        return(result);
}

int
ProcCirculateWindow(register ClientPtr client)
{
    register WindowPtr pWin;
    REQUEST(xCirculateWindowReq);

    REQUEST_SIZE_MATCH(xCirculateWindowReq);
    if ((stuff->direction != RaiseLowest) &&
	(stuff->direction != LowerHighest))
    {
	client->errorValue = stuff->direction;
        return BadValue;
    }
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    CirculateWindow(pWin, (int)stuff->direction, client);
    return(client->noClientException);
}

int
GetGeometry(register ClientPtr client, xGetGeometryReply *rep)
{
    register DrawablePtr pDraw;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    SECURITY_VERIFY_GEOMETRABLE (pDraw, stuff->id, client, SecurityReadAccess);
    rep->type = X_Reply;
    rep->length = 0;
    rep->sequenceNumber = client->sequence;
    rep->root = WindowTable[pDraw->pScreen->myNum]->drawable.id;
    rep->depth = pDraw->depth;
    rep->width = pDraw->width;
    rep->height = pDraw->height;

    /* XXX - Because the pixmap-implementation of the multibuffer extension 
     *       may have the buffer-id's drawable resource value be a pointer
     *       to the buffer's window instead of the buffer itself
     *       (this happens if the buffer is the displayed buffer),
     *       we also have to check that the id matches before we can
     *       truly say that it is a DRAWABLE_WINDOW.
     */

    if ((pDraw->type == UNDRAWABLE_WINDOW) ||
        ((pDraw->type == DRAWABLE_WINDOW) && (stuff->id == pDraw->id)))
    {
        register WindowPtr pWin = (WindowPtr)pDraw;
	rep->x = pWin->origin.x - wBorderWidth (pWin);
	rep->y = pWin->origin.y - wBorderWidth (pWin);
	rep->borderWidth = pWin->borderWidth;
    }
    else /* DRAWABLE_PIXMAP or DRAWABLE_BUFFER */
    {
	rep->x = rep->y = rep->borderWidth = 0;
    }

    return Success;
}


int
ProcGetGeometry(register ClientPtr client)
{
    xGetGeometryReply rep;
    int status;

    if ((status = GetGeometry(client, &rep)) != Success)
	return status;

    WriteReplyToClient(client, sizeof(xGetGeometryReply), &rep);
    return(client->noClientException);
}


int
ProcQueryTree(register ClientPtr client)
{
    xQueryTreeReply reply;
    int numChildren = 0;
    register WindowPtr pChild, pWin, pHead;
    Window  *childIDs = (Window *)NULL;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    reply.type = X_Reply;
    reply.root = WindowTable[pWin->drawable.pScreen->myNum]->drawable.id;
    reply.sequenceNumber = client->sequence;
    if (pWin->parent)
	reply.parent = pWin->parent->drawable.id;
    else
        reply.parent = (Window)None;
    pHead = RealChildHead(pWin);
    for (pChild = pWin->lastChild; pChild != pHead; pChild = pChild->prevSib)
    {
      if (!IsViewportFrame(pChild))
      {
	numChildren++;
      }
    }
    if (numChildren)
    {
	int curChild = 0;

	childIDs = (Window *) ALLOCATE_LOCAL(numChildren * sizeof(Window));
	if (!childIDs)
	    return BadAlloc;
	for (pChild = pWin->lastChild; pChild != pHead; pChild = pChild->prevSib)
        {
          if (!IsViewportFrame(pChild))
          {
	    childIDs[curChild++] = pChild->drawable.id;
          }
        }
    }
    
    reply.nChildren = numChildren;
    reply.length = (numChildren * sizeof(Window)) >> 2;
    
    WriteReplyToClient(client, sizeof(xQueryTreeReply), &reply);
    if (numChildren)
    {
    	client->pSwapReplyFunc = (ReplySwapPtr) Swap32Write;
	WriteSwappedDataToClient(client, numChildren * sizeof(Window), childIDs);
	DEALLOCATE_LOCAL(childIDs);
    }

    return(client->noClientException);
}

int
ProcInternAtom(register ClientPtr client)
{
    Atom atom;
    char *tchar;
    REQUEST(xInternAtomReq);

    REQUEST_FIXED_SIZE(xInternAtomReq, stuff->nbytes);
    if ((stuff->onlyIfExists != xTrue) && (stuff->onlyIfExists != xFalse))
    {
	client->errorValue = stuff->onlyIfExists;
        return(BadValue);
    }
    tchar = (char *) &stuff[1];
    atom = MakeAtom(tchar, stuff->nbytes, !stuff->onlyIfExists);
    if (atom != BAD_RESOURCE)
    {
	xInternAtomReply reply;
	reply.type = X_Reply;
	reply.length = 0;
	reply.sequenceNumber = client->sequence;
	reply.atom = atom;
	WriteReplyToClient(client, sizeof(xInternAtomReply), &reply);
	return(client->noClientException);
    }
    else
	return (BadAlloc);
}

int
ProcGetAtomName(register ClientPtr client)
{
    char *str;
    xGetAtomNameReply reply;
    int len;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    if ( (str = NameForAtom(stuff->id)) )
    {
	len = strlen(str);
	reply.type = X_Reply;
	reply.length = (len + 3) >> 2;
	reply.sequenceNumber = client->sequence;
	reply.nameLength = len;
	WriteReplyToClient(client, sizeof(xGetAtomNameReply), &reply);
	(void)WriteToClient(client, len, str);
	return(client->noClientException);
    }
    else 
    { 
	client->errorValue = stuff->id;
	return (BadAtom);
    }
}

#ifdef K5AUTH
extern int k5_bad();
#endif

int
ProcSetSelectionOwner(register ClientPtr client)
{
    WindowPtr pWin;
    TimeStamp time;
    REQUEST(xSetSelectionOwnerReq);

    REQUEST_SIZE_MATCH(xSetSelectionOwnerReq);
    UpdateCurrentTime();
    time = ClientTimeToServerTime(stuff->time);

    /* If the client's time stamp is in the future relative to the server's
	time stamp, do not set the selection, just return success. */
    if (CompareTimeStamps(time, currentTime) == LATER)
    	return Success;
    if (stuff->window != None)
    {
        pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					       SecurityReadAccess);
        if (!pWin)
            return(BadWindow);
    }
    else
        pWin = (WindowPtr)None;
    if (ValidAtom(stuff->selection))
    {
	int i = 0;

	/*
	 * First, see if the selection is already set... 
	 */
	while ((i < NumCurrentSelections) && 
	       CurrentSelections[i].selection != stuff->selection) 
            i++;
        if (i < NumCurrentSelections)
        {        
	    xEvent event;

	    /* If the timestamp in client's request is in the past relative
		to the time stamp indicating the last time the owner of the
		selection was set, do not set the selection, just return 
		success. */
            if (CompareTimeStamps(time, CurrentSelections[i].lastTimeChanged)
		== EARLIER)
		return Success;
	    if (CurrentSelections[i].client &&
		(!pWin || (CurrentSelections[i].client != client)))
	    {
		event.u.u.type = SelectionClear;
		event.u.selectionClear.time = time.milliseconds;
		event.u.selectionClear.window = CurrentSelections[i].window;
		event.u.selectionClear.atom = CurrentSelections[i].selection;
		(void) TryClientEvents (CurrentSelections[i].client, &event, 1,
				NoEventMask, NoEventMask /* CantBeFiltered */,
				NullGrab);
	    }
	}
	else
	{
	    /*
	     * It doesn't exist, so add it...
	     */
	    Selection *newsels;

	    if (i == 0)
		newsels = (Selection *)xalloc(sizeof(Selection));
	    else
		newsels = (Selection *)xrealloc(CurrentSelections,
			    (NumCurrentSelections + 1) * sizeof(Selection));
	    if (!newsels)
		return BadAlloc;
	    NumCurrentSelections++;
	    CurrentSelections = newsels;
	    CurrentSelections[i].selection = stuff->selection;
	}
        CurrentSelections[i].lastTimeChanged = time;
	CurrentSelections[i].window = stuff->window;
	CurrentSelections[i].pWin = pWin;
	CurrentSelections[i].client = (pWin ? client : NullClient);
	if (SelectionCallback)
	{
	    SelectionInfoRec	info;

	    info.selection = &CurrentSelections[i];
	    info.kind= SelectionSetOwner;
	    CallCallbacks(&SelectionCallback, &info);
	}

#ifdef NXAGENT_CLIPBOARD
      if ((CurrentSelections[i].pWin != NULL) &&
              (nxagentOption(Clipboard) != ClipboardNone) &&
                  ((CurrentSelections[i].selection == XA_PRIMARY) ||
                       (CurrentSelections[i].selection == MakeAtom("CLIPBOARD", 9, 0))))
      {
        nxagentSetSelectionOwner(&CurrentSelections[i]);
      }
#endif
	return (client->noClientException);
    }
    else 
    {
	client->errorValue = stuff->selection;
        return (BadAtom);
    }
}

int
ProcGetSelectionOwner(register ClientPtr client)
{
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    if (ValidAtom(stuff->id))
    {
	int i;
        xGetSelectionOwnerReply reply;

	i = 0;
        while ((i < NumCurrentSelections) && 
	       CurrentSelections[i].selection != stuff->id) i++;
        reply.type = X_Reply;
	reply.length = 0;
	reply.sequenceNumber = client->sequence;
        if (i < NumCurrentSelections)
            reply.owner = CurrentSelections[i].window;
        else
            reply.owner = None;
        WriteReplyToClient(client, sizeof(xGetSelectionOwnerReply), &reply);
        return(client->noClientException);
    }
    else            
    {
	client->errorValue = stuff->id;
        return (BadAtom); 
    }
}

int
ProcConvertSelection(register ClientPtr client)
{
    Bool paramsOkay;
    xEvent event;
    WindowPtr pWin;
    REQUEST(xConvertSelectionReq);

    REQUEST_SIZE_MATCH(xConvertSelectionReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->requestor, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);

#ifdef NXAGENT_CLIPBOARD
    if (((stuff->selection == XA_PRIMARY) ||
           (stuff->selection == MakeAtom("CLIPBOARD", 9, 0))) &&
               nxagentOption(Clipboard) != ClipboardNone)
    {
      int i = 0;

      while ((i < NumCurrentSelections) &&
                CurrentSelections[i].selection != stuff->selection) i++;

      if ((i < NumCurrentSelections) && (CurrentSelections[i].window != None))
      {
        if (nxagentConvertSelection(client, pWin, stuff->selection, stuff->requestor,
                                       stuff->property, stuff->target, stuff->time))
        {
          return (client->noClientException);
        }
      }
    }
#endif

    paramsOkay = (ValidAtom(stuff->selection) && ValidAtom(stuff->target));
    if (stuff->property != None)
	paramsOkay &= ValidAtom(stuff->property);
    if (paramsOkay)
    {
	int i;

	i = 0;
	while ((i < NumCurrentSelections) && 
	       CurrentSelections[i].selection != stuff->selection) i++;
	if ((i < NumCurrentSelections) && 
	    (CurrentSelections[i].window != None) && (CurrentSelections[i].client != NullClient)
#ifdef XCSECURITY
	    && (!client->CheckAccess ||
		(* client->CheckAccess)(client, CurrentSelections[i].window,
					RT_WINDOW, SecurityReadAccess,
					CurrentSelections[i].pWin))
#endif
	    )
	{        
	    event.u.u.type = SelectionRequest;
	    event.u.selectionRequest.time = stuff->time;
	    event.u.selectionRequest.owner = 
			CurrentSelections[i].window;
	    event.u.selectionRequest.requestor = stuff->requestor;
	    event.u.selectionRequest.selection = stuff->selection;
	    event.u.selectionRequest.target = stuff->target;
	    event.u.selectionRequest.property = stuff->property;
	    if (TryClientEvents(
		CurrentSelections[i].client, &event, 1, NoEventMask,
		NoEventMask /* CantBeFiltered */, NullGrab))
		return (client->noClientException);
	}
	event.u.u.type = SelectionNotify;
	event.u.selectionNotify.time = stuff->time;
	event.u.selectionNotify.requestor = stuff->requestor;
	event.u.selectionNotify.selection = stuff->selection;
	event.u.selectionNotify.target = stuff->target;
	event.u.selectionNotify.property = None;
	(void) TryClientEvents(client, &event, 1, NoEventMask,
			       NoEventMask /* CantBeFiltered */, NullGrab);
	return (client->noClientException);
    }
    else 
    {
	client->errorValue = stuff->property;
        return (BadAtom);
    }
}

int
ProcGrabServer(register ClientPtr client)
{
    REQUEST_SIZE_MATCH(xReq);
    if (grabState != GrabNone && client != grabClient)
    {
	ResetCurrentRequest(client);
	client->sequence--;
	BITSET(grabWaiters, client->index);
	IgnoreClient(client);
	return(client->noClientException);
    }
    OnlyListenToOneClient(client);
    grabState = GrabKickout;
    grabClient = client;

    if (ServerGrabCallback)
    {
	ServerGrabInfoRec grabinfo;
	grabinfo.client = client;
	grabinfo.grabstate  = SERVER_GRABBED;
	CallCallbacks(&ServerGrabCallback, (pointer)&grabinfo);
    }

    return(client->noClientException);
}

static void
UngrabServer(ClientPtr client)
{
    int i;

    grabState = GrabNone;
    ListenToAllClients();
    for (i = mskcnt; --i >= 0 && !grabWaiters[i]; )
	;
    if (i >= 0)
    {
	i <<= 5;
	while (!GETBIT(grabWaiters, i))
	    i++;
	BITCLEAR(grabWaiters, i);
	AttendClient(clients[i]);
    }

    if (ServerGrabCallback)
    {
	ServerGrabInfoRec grabinfo;
	grabinfo.client = client;
	grabinfo.grabstate  = SERVER_UNGRABBED;
	CallCallbacks(&ServerGrabCallback, (pointer)&grabinfo);
    }
}

int
ProcUngrabServer(register ClientPtr client)
{
    REQUEST_SIZE_MATCH(xReq);
    UngrabServer(client);
    return(client->noClientException);
}

int
ProcTranslateCoords(register ClientPtr client)
{
    REQUEST(xTranslateCoordsReq);

    register WindowPtr pWin, pDst;
    xTranslateCoordsReply rep;

    REQUEST_SIZE_MATCH(xTranslateCoordsReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->srcWid, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);
    pDst = (WindowPtr)SecurityLookupWindow(stuff->dstWid, client,
					   SecurityReadAccess);
    if (!pDst)
        return(BadWindow);
    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    if (!SAME_SCREENS(pWin->drawable, pDst->drawable))
    {
	rep.sameScreen = xFalse;
        rep.child = None;
	rep.dstX = rep.dstY = 0;
    }
    else
    {
	INT16 x, y;
	rep.sameScreen = xTrue;
	rep.child = None;
	/* computing absolute coordinates -- adjust to destination later */
	x = pWin->drawable.x + stuff->srcX;
	y = pWin->drawable.y + stuff->srcY;
	pWin = pDst->firstChild;
	while (pWin)
	{
#ifdef SHAPE
	    BoxRec  box;
#endif
	    if ((pWin->mapped) &&
		(x >= pWin->drawable.x - wBorderWidth (pWin)) &&
		(x < pWin->drawable.x + (int)pWin->drawable.width +
		 wBorderWidth (pWin)) &&
		(y >= pWin->drawable.y - wBorderWidth (pWin)) &&
		(y < pWin->drawable.y + (int)pWin->drawable.height +
		 wBorderWidth (pWin))
#ifdef SHAPE
		/* When a window is shaped, a further check
		 * is made to see if the point is inside
		 * borderSize
		 */
		&& (!wBoundingShape(pWin) ||
		    POINT_IN_REGION(pWin->drawable.pScreen, 
					&pWin->borderSize, x, y, &box))
		
		&& (!wInputShape(pWin) ||
		    POINT_IN_REGION(pWin->drawable.pScreen,
				    wInputShape(pWin),
				    x - pWin->drawable.x,
				    y - pWin->drawable.y, &box))
#endif
		)
            {
		rep.child = pWin->drawable.id;
		pWin = (WindowPtr) NULL;
	    }
	    else
		pWin = pWin->nextSib;
	}
	/* adjust to destination coordinates */
	rep.dstX = x - pDst->drawable.x;
	rep.dstY = y - pDst->drawable.y;
    }
    WriteReplyToClient(client, sizeof(xTranslateCoordsReply), &rep);
    return(client->noClientException);
}

int
ProcOpenFont(register ClientPtr client)
{
    int	err;
    char fontReq[256];
    REQUEST(xOpenFontReq);

    REQUEST_FIXED_SIZE(xOpenFontReq, stuff->nbytes);
    client->errorValue = stuff->fid;
    LEGAL_NEW_RESOURCE(stuff->fid, client);

    memcpy(fontReq,(char *)&stuff[1],(stuff->nbytes<256)?stuff->nbytes:255);
    fontReq[stuff->nbytes]=0;
    if (strchr(fontReq,'*') || strchr(fontReq,'?'))
    {
       extern int nxOpenFont(ClientPtr, XID, Mask, unsigned, char*);
#ifdef NXAGENT_FONTMATCH_DEBUG
       fprintf(stderr, "Dispatch: ProcOpenFont try to find a common font with font pattern=%s\n",fontReq);
#endif
       nxagentListRemoteFonts(fontReq, nxagentMaxFontNames);
       err = nxOpenFont(client, stuff->fid, (Mask) 0,
		stuff->nbytes, (char *)&stuff[1]);
    }
    else
    err = OpenFont(client, stuff->fid, (Mask) 0,
		stuff->nbytes, (char *)&stuff[1]);
    if (err == Success)
    {
	return(client->noClientException);
    }
    else
	return err;
}

int
ProcCloseFont(register ClientPtr client)
{
    FontPtr pFont;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pFont = (FontPtr)SecurityLookupIDByType(client, stuff->id, RT_FONT,
					    SecurityDestroyAccess);
    if (pFont != (FontPtr)NULL)
    {
        #ifdef NXAGENT_SERVER

        /*
         * When a client closes a font the resource
         * should not be lost if the reference counter
         * is not 0, otherwise the server will not be
         * able to find this font looping through the
         * resources.
         */

        if (pFont -> refcnt > 0)
        {
          if (nxagentFindClientResource(serverClient -> index, RT_NX_FONT, pFont) == 0)
          {
            #ifdef TEST
            fprintf(stderr, "ProcCloseFont: Switching resource for font at [%p].\n",
                        (void *) pFont);
            #endif

            nxagentFontPriv(pFont) -> mirrorID = FakeClientID(serverClient -> index);

            AddResource(nxagentFontPriv(pFont) -> mirrorID, RT_NX_FONT, pFont);

          }
          #ifdef TEST
          else
          {
            fprintf(stderr, "ProcCloseFont: Found duplicated font at [%p], "
                        "resource switching skipped.\n", (void *) pFont);
          }
          #endif
        }

        #endif

        FreeResource(stuff->id, RT_NONE);
	return(client->noClientException);
    }
    else
    {
	client->errorValue = stuff->id;
        return (BadFont);
    }
}

int
ProcQueryFont(register ClientPtr client)
{
    xQueryFontReply	*reply;
    FontPtr pFont;
    register GC *pGC;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    client->errorValue = stuff->id;		/* EITHER font or gc */

    pFont = NULL;
    pFont = (FontPtr)SecurityLookupIDByType(client, stuff->id, RT_FONT,
					    SecurityReadAccess);
    if (!pFont)
    {
	  /* can't use VERIFY_GC because it might return BadGC */
	pGC = (GC *) SecurityLookupIDByType(client, stuff->id, RT_GC,
					    SecurityReadAccess);
        if (!pGC)
	{
	    client->errorValue = stuff->id;
            return(BadFont);     /* procotol…