int
ProcXSendExtensionEvent(ClientPtr client)
{
int ret;
DeviceIntPtr dev;
xEvent *first;
XEventClass *list;
struct tmask tmp[EMASKSIZE];
REQUEST(xSendExtensionEventReq);
REQUEST_AT_LEAST_SIZE(xSendExtensionEventReq);
if (stuff->length != bytes_to_int32(sizeof(xSendExtensionEventReq)) + stuff->count +
(stuff->num_events * bytes_to_int32(sizeof(xEvent))))
return BadLength;
ret = dixLookupDevice(&dev, stuff->deviceid, client, DixWriteAccess);
if (ret != Success)
return ret;
/* The client's event type must be one defined by an extension. */
first = ((xEvent *) & stuff[1]);
if (!((EXTENSION_EVENT_BASE <= first->u.u.type) &&
(first->u.u.type < lastEvent))) {
client->errorValue = first->u.u.type;
return BadValue;
}
list = (XEventClass *) (first + stuff->num_events);
if ((ret = CreateMaskFromList(client, list, stuff->count, tmp, dev,
X_SendExtensionEvent)) != Success)
return ret;
ret = (SendEvent(client, dev, stuff->destination,
stuff->propagate, (xEvent *) & stuff[1],
tmp[stuff->deviceid].mask, stuff->num_events));
return ret;
}
int
ProcXGrabDevice(ClientPtr client)
{
int rc;
xGrabDeviceReply rep;
DeviceIntPtr dev;
GrabMask mask;
struct tmask tmp[EMASKSIZE];
REQUEST(xGrabDeviceReq);
REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
if (stuff->length !=
bytes_to_int32(sizeof(xGrabDeviceReq)) + stuff->event_count)
return BadLength;
rep = (xGrabDeviceReply) {
.repType = X_Reply,
.RepType = X_GrabDevice,
.sequenceNumber = client->sequence,
.length = 0,
};
rc = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
if (rc != Success)
return rc;
if ((rc = CreateMaskFromList(client, (XEventClass *) &stuff[1],
stuff->event_count, tmp, dev,
X_GrabDevice)) != Success)
return rc;
mask.xi = tmp[stuff->deviceid].mask;
rc = GrabDevice(client, dev, stuff->other_devices_mode,
stuff->this_device_mode, stuff->grabWindow,
stuff->ownerEvents, stuff->time,
&mask, XI, None, None, &rep.status);
if (rc != Success)
return rc;
WriteReplyToClient(client, sizeof(xGrabDeviceReply), &rep);
return Success;
}
/***********************************************************************
*
* This procedure creates an event mask from a list of XEventClasses.
*
* Procedure is as follows:
* An XEventClass is (deviceid << 8 | eventtype). For each entry in the list,
* get the device. Then run through all available event indices (those are
* set when XI starts up) and binary OR's the device's mask to whatever the
* event mask for the given event type was.
* If an error occurs, it is sent to the client. Errors are generated if
* - if the device given in the event classs is invalid
* - if the device in the class list is not the device given as parameter (no
* error if parameter is NULL)
*
* mask has to be size EMASKSIZE and pre-allocated.
*
* @param client The client to send the error to (if one occurs)
* @param list List of event classes as sent from the client.
* @param count Number of elements in list.
* @param mask Preallocated mask (size EMASKSIZE).
* @param dev The device we're creating masks for.
* @param req The request we're processing. Used to fill in error fields.
*/
int
CreateMaskFromList(ClientPtr client, XEventClass * list, int count,
struct tmask *mask, DeviceIntPtr dev, int req)
{
int rc, i, j;
int device;
DeviceIntPtr tdev;
memset(mask, 0, EMASKSIZE * sizeof(struct tmask));
for (i = 0; i < count; i++, list++) {
device = *list >> 8;
if (device > 255)
return BadClass;
rc = dixLookupDevice(&tdev, device, client, DixUseAccess);
if (rc != BadDevice && rc != Success)
return rc;
if (rc == BadDevice || (dev != NULL && tdev != dev))
return BadClass;
for (j = 0; j < ExtEventIndex; j++)
if (EventInfo[j].type == (*list & 0xff)) {
mask[device].mask |= EventInfo[j].mask;
mask[device].dev = (Pointer) tdev;
break;
}
}
return Success;
}
int _X_COLD
SProcXSendExtensionEvent(ClientPtr client)
{
CARD32 *p;
int i;
xEvent eventT = { .u.u.type = 0 };
xEvent *eventP;
EventSwapPtr proc;
REQUEST(xSendExtensionEventReq);
swaps(&stuff->length);
REQUEST_AT_LEAST_SIZE(xSendExtensionEventReq);
swapl(&stuff->destination);
swaps(&stuff->count);
if (stuff->length !=
bytes_to_int32(sizeof(xSendExtensionEventReq)) + stuff->count +
bytes_to_int32(stuff->num_events * sizeof(xEvent)))
return BadLength;
eventP = (xEvent *) &stuff[1];
for (i = 0; i < stuff->num_events; i++, eventP++) {
if (eventP->u.u.type == GenericEvent) {
client->errorValue = eventP->u.u.type;
return BadValue;
}
proc = EventSwapVector[eventP->u.u.type & 0177];
/* no swapping proc; invalid event type? */
if (proc == NotImplemented) {
client->errorValue = eventP->u.u.type;
return BadValue;
}
(*proc) (eventP, &eventT);
*eventP = eventT;
}
p = (CARD32 *) (((xEvent *) &stuff[1]) + stuff->num_events);
SwapLongs(p, stuff->count);
return (ProcXSendExtensionEvent(client));
}
/***********************************************************************
*
* Send an event to some client, as if it had come from an extension input
* device.
*
*/
int
ProcXSendExtensionEvent(ClientPtr client)
{
int ret, i;
DeviceIntPtr dev;
xEvent *first;
XEventClass *list;
struct tmask tmp[EMASKSIZE];
REQUEST(xSendExtensionEventReq);
REQUEST_AT_LEAST_SIZE(xSendExtensionEventReq);
if (stuff->length !=
bytes_to_int32(sizeof(xSendExtensionEventReq)) + stuff->count +
(stuff->num_events * bytes_to_int32(sizeof(xEvent))))
return BadLength;
ret = dixLookupDevice(&dev, stuff->deviceid, client, DixWriteAccess);
if (ret != Success)
return ret;
if (stuff->num_events == 0)
return ret;
/* The client's event type must be one defined by an extension. */
first = ((xEvent *) &stuff[1]);
for (i = 0; i < stuff->num_events; i++) {
if (!((EXTENSION_EVENT_BASE <= first[i].u.u.type) &&
(first[i].u.u.type < lastEvent))) {
client->errorValue = first[i].u.u.type;
return BadValue;
}
}
list = (XEventClass *) (first + stuff->num_events);
if ((ret = CreateMaskFromList(client, list, stuff->count, tmp, dev,
X_SendExtensionEvent)) != Success)
return ret;
ret = (SendEvent(client, dev, stuff->destination,
stuff->propagate, (xEvent *) &stuff[1],
tmp[stuff->deviceid].mask, stuff->num_events));
return ret;
}
