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-rw-r--r--xorg-server/Xi/xiselectev.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/xorg-server/Xi/xiselectev.c b/xorg-server/Xi/xiselectev.c
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index 000000000..672edab3b
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+++ b/xorg-server/Xi/xiselectev.c
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+/*
+ * Copyright 2008 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
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+
+#include "dixstruct.h"
+#include "windowstr.h"
+#include "exglobals.h"
+#include "exevents.h"
+#include <X11/extensions/XI2proto.h>
+
+#include "xiselectev.h"
+
+/**
+ * Check the given mask (in len bytes) for invalid mask bits.
+ * Invalid mask bits are any bits above XI2LastEvent.
+ *
+ * @return BadValue if at least one invalid bit is set or Success otherwise.
+ */
+int XICheckInvalidMaskBits(unsigned char *mask, int len)
+{
+ if (len >= XIMaskLen(XI2LASTEVENT))
+ {
+ int i;
+ for (i = XI2LASTEVENT + 1; i < len * 8; i++)
+ if (BitIsOn(mask, i))
+ return BadValue;
+ }
+
+ return Success;
+}
+
+int
+SProcXISelectEvents(ClientPtr client)
+{
+ char n;
+ int i;
+ xXIEventMask* evmask;
+
+ REQUEST(xXISelectEventsReq);
+ swaps(&stuff->length, n);
+ REQUEST_AT_LEAST_SIZE(xXISelectEventsReq);
+ swapl(&stuff->win, n);
+ swaps(&stuff->num_masks, n);
+
+ evmask = (xXIEventMask*)&stuff[1];
+ for (i = 0; i < stuff->num_masks; i++)
+ {
+ swaps(&evmask->deviceid, n);
+ swaps(&evmask->mask_len, n);
+ evmask = (xXIEventMask*)(((char*)&evmask[1]) + evmask->mask_len * 4);
+ }
+
+ return (ProcXISelectEvents(client));
+}
+
+int
+ProcXISelectEvents(ClientPtr client)
+{
+ int rc, num_masks;
+ WindowPtr win;
+ DeviceIntPtr dev;
+ DeviceIntRec dummy;
+ xXIEventMask *evmask;
+ int *types = NULL;
+ int len;
+
+ REQUEST(xXISelectEventsReq);
+ REQUEST_AT_LEAST_SIZE(xXISelectEventsReq);
+
+ if (stuff->num_masks == 0)
+ return BadValue;
+
+ rc = dixLookupWindow(&win, stuff->win, client, DixReceiveAccess);
+ if (rc != Success)
+ return rc;
+
+ len = sz_xXISelectEventsReq;
+
+ /* check request validity */
+ evmask = (xXIEventMask*)&stuff[1];
+ num_masks = stuff->num_masks;
+ while(num_masks--)
+ {
+ len += sizeof(xXIEventMask) + evmask->mask_len * 4;
+
+ if (bytes_to_int32(len) > stuff->length)
+ return BadLength;
+
+ if (evmask->deviceid != XIAllDevices &&
+ evmask->deviceid != XIAllMasterDevices)
+ rc = dixLookupDevice(&dev, evmask->deviceid, client, DixUseAccess);
+ else {
+ /* XXX: XACE here? */
+ }
+ if (rc != Success)
+ return rc;
+
+ /* hierarchy event mask is not allowed on devices */
+ if (evmask->deviceid != XIAllDevices && evmask->mask_len >= 1)
+ {
+ unsigned char *bits = (unsigned char*)&evmask[1];
+ if (BitIsOn(bits, XI_HierarchyChanged))
+ return BadValue;
+ }
+
+ /* Raw events may only be selected on root windows */
+ if (win->parent && evmask->mask_len >= 1)
+ {
+ unsigned char *bits = (unsigned char*)&evmask[1];
+ if (BitIsOn(bits, XI_RawKeyPress) ||
+ BitIsOn(bits, XI_RawKeyRelease) ||
+ BitIsOn(bits, XI_RawButtonPress) ||
+ BitIsOn(bits, XI_RawButtonRelease) ||
+ BitIsOn(bits, XI_RawMotion))
+ return BadValue;
+ }
+
+ if (XICheckInvalidMaskBits((unsigned char*)&evmask[1],
+ evmask->mask_len * 4) != Success)
+ return BadValue;
+
+ evmask = (xXIEventMask*)(((unsigned char*)evmask) + evmask->mask_len * 4);
+ evmask++;
+ }
+
+ if (bytes_to_int32(len) != stuff->length)
+ return BadLength;
+
+ /* Set masks on window */
+ evmask = (xXIEventMask*)&stuff[1];
+ num_masks = stuff->num_masks;
+ while(num_masks--)
+ {
+ if (evmask->deviceid == XIAllDevices ||
+ evmask->deviceid == XIAllMasterDevices)
+ {
+ dummy.id = evmask->deviceid;
+ dev = &dummy;
+ } else
+ dixLookupDevice(&dev, evmask->deviceid, client, DixUseAccess);
+ if (XISetEventMask(dev, win, client, evmask->mask_len * 4,
+ (unsigned char*)&evmask[1]) != Success)
+ return BadAlloc;
+ evmask = (xXIEventMask*)(((unsigned char*)evmask) + evmask->mask_len * 4);
+ evmask++;
+ }
+
+ RecalculateDeliverableEvents(win);
+
+ xfree(types);
+ return Success;
+}
+
+
+int
+SProcXIGetSelectedEvents(ClientPtr client)
+{
+ char n;
+
+ REQUEST(xXIGetSelectedEventsReq);
+ swaps(&stuff->length, n);
+ REQUEST_SIZE_MATCH(xXIGetSelectedEventsReq);
+ swapl(&stuff->win, n);
+
+ return (ProcXIGetSelectedEvents(client));
+}
+
+int
+ProcXIGetSelectedEvents(ClientPtr client)
+{
+ int rc, i;
+ WindowPtr win;
+ char n;
+ char *buffer = NULL;
+ xXIGetSelectedEventsReply reply;
+ OtherInputMasks *masks;
+ InputClientsPtr others = NULL;
+ xXIEventMask *evmask = NULL;
+ DeviceIntPtr dev;
+
+ REQUEST(xXIGetSelectedEventsReq);
+ REQUEST_SIZE_MATCH(xXIGetSelectedEventsReq);
+
+ rc = dixLookupWindow(&win, stuff->win, client, DixGetAttrAccess);
+ if (rc != Success)
+ return rc;
+
+ reply.repType = X_Reply;
+ reply.RepType = X_XIGetSelectedEvents;
+ reply.length = 0;
+ reply.sequenceNumber = client->sequence;
+ reply.num_masks = 0;
+
+ masks = wOtherInputMasks(win);
+ if (masks)
+ {
+ for (others = wOtherInputMasks(win)->inputClients; others;
+ others = others->next) {
+ if (SameClient(others, client)) {
+ break;
+ }
+ }
+ }
+
+ if (!others)
+ {
+ WriteReplyToClient(client, sizeof(xXIGetSelectedEventsReply), &reply);
+ return Success;
+ }
+
+ buffer = xcalloc(MAXDEVICES, sizeof(xXIEventMask) + pad_to_int32(XI2MASKSIZE));
+ if (!buffer)
+ return BadAlloc;
+
+ evmask = (xXIEventMask*)buffer;
+ for (i = 0; i < MAXDEVICES; i++)
+ {
+ int j;
+ unsigned char *devmask = others->xi2mask[i];
+
+ if (i > 2)
+ {
+ rc = dixLookupDevice(&dev, i, client, DixGetAttrAccess);
+ if (rc != Success)
+ continue;
+ }
+
+
+ for (j = XI2MASKSIZE - 1; j >= 0; j--)
+ {
+ if (devmask[j] != 0)
+ {
+ int mask_len = (j + 4)/4; /* j is an index, hence + 4, not + 3 */
+ evmask->deviceid = i;
+ evmask->mask_len = mask_len;
+ reply.num_masks++;
+ reply.length += sizeof(xXIEventMask)/4 + evmask->mask_len;
+
+ if (client->swapped)
+ {
+ swaps(&evmask->deviceid, n);
+ swaps(&evmask->mask_len, n);
+ }
+
+ memcpy(&evmask[1], devmask, j + 1);
+ evmask = (xXIEventMask*)((char*)evmask +
+ sizeof(xXIEventMask) + mask_len * 4);
+ break;
+ }
+ }
+ }
+
+ WriteReplyToClient(client, sizeof(xXIGetSelectedEventsReply), &reply);
+
+ if (reply.num_masks)
+ WriteToClient(client, reply.length * 4, buffer);
+
+ xfree(buffer);
+ return Success;
+}
+
+void SRepXIGetSelectedEvents(ClientPtr client,
+ int len, xXIGetSelectedEventsReply *rep)
+{
+ char n;
+
+ swaps(&rep->sequenceNumber, n);
+ swapl(&rep->length, n);
+ swaps(&rep->num_masks, n);
+ WriteToClient(client, len, (char *)rep);
+}
+
+
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