xenocara/xserver/Xi/xiallowev.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

141 lines
4.0 KiB
C

/*
* Copyright © 2009 Red Hat, Inc.
*
* 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
*/
/***********************************************************************
*
* Request to allow some device events.
*
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "inputstr.h" /* DeviceIntPtr */
#include "windowstr.h" /* window structure */
#include "mi.h"
#include "eventstr.h"
#include <X11/extensions/XI2.h>
#include <X11/extensions/XI2proto.h>
#include "exglobals.h" /* BadDevice */
#include "exevents.h"
#include "xiallowev.h"
int
SProcXIAllowEvents(ClientPtr client)
{
REQUEST(xXIAllowEventsReq);
REQUEST_AT_LEAST_SIZE(xXIAllowEventsReq);
swaps(&stuff->length);
swaps(&stuff->deviceid);
swapl(&stuff->time);
if (stuff->length > 3) {
xXI2_2AllowEventsReq *req_xi22 = (xXI2_2AllowEventsReq *) stuff;
REQUEST_AT_LEAST_SIZE(xXI2_2AllowEventsReq);
swapl(&req_xi22->touchid);
swapl(&req_xi22->grab_window);
}
return ProcXIAllowEvents(client);
}
int
ProcXIAllowEvents(ClientPtr client)
{
TimeStamp time;
DeviceIntPtr dev;
int ret = Success;
XIClientPtr xi_client;
Bool have_xi22 = FALSE;
REQUEST(xXI2_2AllowEventsReq);
xi_client = dixLookupPrivate(&client->devPrivates, XIClientPrivateKey);
if (version_compare(xi_client->major_version,
xi_client->minor_version, 2, 2) >= 0) {
REQUEST_AT_LEAST_SIZE(xXI2_2AllowEventsReq);
have_xi22 = TRUE;
}
else {
REQUEST_AT_LEAST_SIZE(xXIAllowEventsReq);
}
ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGetAttrAccess);
if (ret != Success)
return ret;
time = ClientTimeToServerTime(stuff->time);
switch (stuff->mode) {
case XIReplayDevice:
AllowSome(client, time, dev, NOT_GRABBED);
break;
case XISyncDevice:
AllowSome(client, time, dev, FREEZE_NEXT_EVENT);
break;
case XIAsyncDevice:
AllowSome(client, time, dev, THAWED);
break;
case XIAsyncPairedDevice:
if (IsMaster(dev))
AllowSome(client, time, dev, THAW_OTHERS);
break;
case XISyncPair:
if (IsMaster(dev))
AllowSome(client, time, dev, FREEZE_BOTH_NEXT_EVENT);
break;
case XIAsyncPair:
if (IsMaster(dev))
AllowSome(client, time, dev, THAWED_BOTH);
break;
case XIRejectTouch:
case XIAcceptTouch:
{
int rc;
WindowPtr win;
if (!have_xi22)
return BadValue;
rc = dixLookupWindow(&win, stuff->grab_window, client, DixReadAccess);
if (rc != Success)
return rc;
ret = TouchAcceptReject(client, dev, stuff->mode, stuff->touchid,
stuff->grab_window, &client->errorValue);
}
break;
default:
client->errorValue = stuff->mode;
ret = BadValue;
}
return ret;
}