xenocara/xserver/Xi/xigetclientpointer.c
matthieu 797ed93386 Protocol handling issues in X Window System servers
One year after Ilja van Sprundel, discovered and reported a large number
of issues in the way the X server code base handles requests from X clients,
they have been fixed.
2014-12-09 17:58:52 +00:00

108 lines
3.4 KiB
C

/*
* Copyright 2007-2008 Peter Hutterer
*
* 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, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Author: Peter Hutterer, University of South Australia, NICTA
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h> /* for inputstr.h */
#include <X11/Xproto.h> /* Request macro */
#include "inputstr.h" /* DeviceIntPtr */
#include "windowstr.h" /* window structure */
#include "scrnintstr.h" /* screen structure */
#include <X11/extensions/XI.h>
#include <X11/extensions/XI2proto.h>
#include "extnsionst.h"
#include "extinit.h" /* LookupDeviceIntRec */
#include "exevents.h"
#include "exglobals.h"
#include "xigetclientpointer.h"
/***********************************************************************
* This procedure allows a client to query another client's client pointer
* setting.
*/
int
SProcXIGetClientPointer(ClientPtr client)
{
REQUEST(xXIGetClientPointerReq);
REQUEST_SIZE_MATCH(xXIGetClientPointerReq);
swaps(&stuff->length);
swapl(&stuff->win);
return ProcXIGetClientPointer(client);
}
int
ProcXIGetClientPointer(ClientPtr client)
{
int rc;
ClientPtr winclient;
xXIGetClientPointerReply rep;
REQUEST(xXIGetClientPointerReq);
REQUEST_SIZE_MATCH(xXIGetClientPointerReq);
if (stuff->win != None) {
rc = dixLookupClient(&winclient, stuff->win, client, DixGetAttrAccess);
if (rc != Success)
return BadWindow;
}
else
winclient = client;
rep = (xXIGetClientPointerReply) {
.repType = X_Reply,
.RepType = X_XIGetClientPointer,
.sequenceNumber = client->sequence,
.length = 0,
.set = (winclient->clientPtr != NULL),
.deviceid = (winclient->clientPtr) ? winclient->clientPtr->id : 0
};
WriteReplyToClient(client, sizeof(xXIGetClientPointerReply), &rep);
return Success;
}
/***********************************************************************
*
* This procedure writes the reply for the XGetClientPointer function,
* if the client and server have a different byte ordering.
*
*/
void
SRepXIGetClientPointer(ClientPtr client, int size,
xXIGetClientPointerReply * rep)
{
swaps(&rep->sequenceNumber);
swapl(&rep->length);
swaps(&rep->deviceid);
WriteToClient(client, size, rep);
}