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[UMPNPMGR] PNP_GetRelatedDeviceInstance must return the root device as the parent of non-existing devices

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This commit is contained in:
Eric Kohl 2022-04-18 09:48:03 +02:00
parent 94d144f8a5
commit 11886ebec2
1 changed files with 33 additions and 3 deletions
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36
base/services/umpnpmgr/rpcserver.c
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@ -413,6 +413,17 @@ IsRootDeviceInstanceID(
}
static
BOOL
IsPresentDeviceInstanceID(
_In_ LPWSTR pszDeviceInstanceID)
{
DWORD ulStatus, ulProblem;
return (GetDeviceStatus(pszDeviceInstanceID, &ulStatus, &ulProblem) == CR_SUCCESS);
}
static
CONFIGRET
OpenConfigurationKey(
@ -781,10 +792,29 @@ PNP_GetRelatedDeviceInstance(
if (!IsValidDeviceInstanceID(pDeviceID))
return CR_INVALID_DEVINST;
/* The root device does not have a parent device or sibling devices */
if ((ulRelationship == PNP_GET_PARENT_DEVICE_INSTANCE) ||
(ulRelationship == PNP_GET_SIBLING_DEVICE_INSTANCE))
if (ulRelationship == PNP_GET_PARENT_DEVICE_INSTANCE)
{
/* The root device does not have a parent */
if (IsRootDeviceInstanceID(pDeviceID))
return CR_NO_SUCH_DEVINST;
/* Return the root device for non existing devices */
if (!IsPresentDeviceInstanceID(pDeviceID))
{
if ((wcslen(szRootDeviceInstanceID) + 1) > *pulLength)
{
*pulLength = wcslen(szRootDeviceInstanceID) + 1;
return CR_BUFFER_SMALL;
}
wcscpy(pRelatedDeviceId, szRootDeviceInstanceID);
*pulLength = wcslen(szRootDeviceInstanceID) + 1;
return CR_SUCCESS;
}
}
else if (ulRelationship == PNP_GET_SIBLING_DEVICE_INSTANCE)
{
/* The root device does not have siblings */
if (IsRootDeviceInstanceID(pDeviceID))
return CR_NO_SUCH_DEVINST;
}