qryacces.c 3.61 KB
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/*
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 * 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, UniSA, NICTA
 */
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#define	 NEED_EVENTS
#define	 NEED_REPLIES
#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/XIproto.h>
#include "extnsionst.h"
#include "extinit.h"	/* LookupDeviceIntRec */
#include "exevents.h"
#include "exglobals.h"

#include "qryacces.h"

/***********************************************************************
 * This procedure allows a client to query window access control.
 */

int
SProcXQueryWindowAccess(ClientPtr client)
{
    char n;
    REQUEST(xQueryWindowAccessReq);

    swaps(&stuff->length, n);
    swapl(&stuff->win, n);
    return ProcXQueryWindowAccess(client);
}

int
ProcXQueryWindowAccess(ClientPtr client)
{
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    int rc;
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    WindowPtr win;
    DeviceIntPtr *perm, *deny;
    int nperm, ndeny, i;
    int defaultRule;
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    XID* deviceids;
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    xQueryWindowAccessReply rep;

    REQUEST(xQueryWindowAccessReq);
    REQUEST_SIZE_MATCH(xQueryWindowAccessReq);

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    rc = dixLookupWindow(&win, stuff->win, client, DixReadAccess);
    if (rc != Success)
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    {
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        return rc;
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    }

    ACQueryWindowAccess(win, &defaultRule, &perm, &nperm, &deny, &ndeny);

    rep.repType = X_Reply;
    rep.RepType = X_QueryWindowAccess;
    rep.sequenceNumber = client->sequence;
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    rep.length = ((nperm + ndeny) * sizeof(XID) + 3) >> 2;
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    rep.defaultRule = defaultRule;
    rep.npermit = nperm;
    rep.ndeny = ndeny;
    WriteReplyToClient(client, sizeof(xQueryWindowAccessReply), &rep);

    if (nperm + ndeny)
    {
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        deviceids = (XID*)xalloc((nperm + ndeny) * sizeof(XID));
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        if (!deviceids)
        {
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            ErrorF("[Xi] ProcXQueryWindowAccess: xalloc failure.\n");
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            return BadImplementation;
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        }

        for (i = 0; i < nperm; i++)
            deviceids[i] = perm[i]->id;
        for (i = 0; i < ndeny; i++)
            deviceids[i + nperm] = deny[i]->id;

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        WriteToClient(client, (nperm + ndeny) * sizeof(XID), (char*)deviceids);
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        xfree(deviceids);
    }
    return Success;
}

void
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SRepXQueryWindowAccess(ClientPtr client,
                      int size,
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                      xQueryWindowAccessReply* rep)
{
    char n;
    swaps(&rep->sequenceNumber, n);
    swapl(&rep->length, n);
    WriteToClient(client, size, (char*)rep);
}