reactos/ntoskrnl/ex/win32k.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Kernel
* FILE: ntoskrnl/ex/win32k.c
* PURPOSE: Executive Win32 Object Support (Desktop/WinStation)
* PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
*/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
typedef struct _WIN32_KERNEL_OBJECT_HEADER
{
ULONG SessionId;
} WIN32_KERNEL_OBJECT_HEADER, *PWIN32_KERNEL_OBJECT_HEADER;
/* DATA **********************************************************************/
POBJECT_TYPE ExWindowStationObjectType = NULL;
POBJECT_TYPE ExDesktopObjectType = NULL;
GENERIC_MAPPING ExpWindowStationMapping =
{
STANDARD_RIGHTS_READ,
STANDARD_RIGHTS_WRITE,
STANDARD_RIGHTS_EXECUTE,
STANDARD_RIGHTS_REQUIRED
};
GENERIC_MAPPING ExpDesktopMapping =
{
STANDARD_RIGHTS_READ,
STANDARD_RIGHTS_WRITE,
STANDARD_RIGHTS_EXECUTE,
STANDARD_RIGHTS_REQUIRED
};
PKWIN32_SESSION_CALLOUT ExpWindowStationObjectParse = NULL;
PKWIN32_SESSION_CALLOUT ExpWindowStationObjectDelete = NULL;
PKWIN32_SESSION_CALLOUT ExpWindowStationObjectOkToClose = NULL;
PKWIN32_SESSION_CALLOUT ExpDesktopObjectOkToClose = NULL;
PKWIN32_SESSION_CALLOUT ExpDesktopObjectDelete = NULL;
PKWIN32_SESSION_CALLOUT ExpDesktopObjectOpen = NULL;
PKWIN32_SESSION_CALLOUT ExpDesktopObjectClose = NULL;
/* FUNCTIONS ****************************************************************/
NTSTATUS
NTAPI
ExpWin32SessionCallout(
_In_ PVOID Object,
_In_ PKWIN32_SESSION_CALLOUT CalloutProcedure,
_Inout_opt_ PVOID Parameter)
{
PWIN32_KERNEL_OBJECT_HEADER Win32ObjectHeader;
PVOID SessionEntry = NULL;
KAPC_STATE ApcState;
NTSTATUS Status;
/* The objects have a common header. And the kernel accesses it!
Thanks MS for this kind of retarded "design"! */
Win32ObjectHeader = Object;
/* Check if we are not already in the correct session */
if (!PsGetCurrentProcess()->ProcessInSession ||
(PsGetCurrentProcessSessionId() != Win32ObjectHeader->SessionId))
{
/* Get the session from the objects session Id */
DPRINT("SessionId == %d\n", Win32ObjectHeader->SessionId);
SessionEntry = MmGetSessionById(Win32ObjectHeader->SessionId);
if (SessionEntry == NULL)
{
/* The requested session does not even exist! */
ASSERT(FALSE);
return STATUS_NOT_FOUND;
}
/* Attach to the session */
Status = MmAttachSession(SessionEntry, &ApcState);
if (!NT_SUCCESS(Status))
{
DPRINT1("Could not attach to 0x%p, object %p, callout 0x%p\n",
SessionEntry,
Win32ObjectHeader,
CalloutProcedure);
/* Cleanup and return */
MmQuitNextSession(SessionEntry);
ASSERT(FALSE);
return Status;
}
}
/* Call the callout routine */
Status = CalloutProcedure(Parameter);
/* Check if we have a session */
if (SessionEntry != NULL)
{
/* Detach from the session and quit using it */
MmDetachSession(SessionEntry, &ApcState);
MmQuitNextSession(SessionEntry);
}
/* Return the callback status */
return Status;
}
BOOLEAN
NTAPI
ExpDesktopOkToClose( IN PEPROCESS Process OPTIONAL,
IN PVOID Object,
IN HANDLE Handle,
IN KPROCESSOR_MODE AccessMode)
{
WIN32_OKAYTOCLOSEMETHOD_PARAMETERS Parameters;
NTSTATUS Status;
Parameters.Process = Process;
Parameters.Object = Object;
Parameters.Handle = Handle;
Parameters.PreviousMode = AccessMode;
Status = ExpWin32SessionCallout(Object,
ExpDesktopObjectOkToClose,
&Parameters);
return NT_SUCCESS(Status);
}
BOOLEAN
NTAPI
ExpWindowStationOkToClose( IN PEPROCESS Process OPTIONAL,
IN PVOID Object,
IN HANDLE Handle,
IN KPROCESSOR_MODE AccessMode)
{
WIN32_OKAYTOCLOSEMETHOD_PARAMETERS Parameters;
NTSTATUS Status;
Parameters.Process = Process;
Parameters.Object = Object;
Parameters.Handle = Handle;
Parameters.PreviousMode = AccessMode;
Status = ExpWin32SessionCallout(Object,
ExpWindowStationObjectOkToClose,
&Parameters);
return NT_SUCCESS(Status);
}
VOID
NTAPI
ExpWinStaObjectDelete(PVOID DeletedObject)
{
WIN32_DELETEMETHOD_PARAMETERS Parameters;
/* Fill out the callback structure */
Parameters.Object = DeletedObject;
ExpWin32SessionCallout(DeletedObject,
ExpWindowStationObjectDelete,
&Parameters);
}
NTSTATUS
NTAPI
ExpWinStaObjectParse(IN PVOID ParseObject,
IN PVOID ObjectType,
IN OUT PACCESS_STATE AccessState,
IN KPROCESSOR_MODE AccessMode,
IN ULONG Attributes,
IN OUT PUNICODE_STRING CompleteName,
IN OUT PUNICODE_STRING RemainingName,
IN OUT PVOID Context OPTIONAL,
IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL,
OUT PVOID *Object)
{
WIN32_PARSEMETHOD_PARAMETERS Parameters;
/* Fill out the callback structure */
Parameters.ParseObject = ParseObject;
Parameters.ObjectType = ObjectType;
Parameters.AccessState = AccessState;
Parameters.AccessMode = AccessMode;
Parameters.Attributes = Attributes;
Parameters.CompleteName = CompleteName;
Parameters.RemainingName = RemainingName;
Parameters.Context = Context;
Parameters.SecurityQos = SecurityQos;
Parameters.Object = Object;
return ExpWin32SessionCallout(ParseObject,
ExpWindowStationObjectParse,
&Parameters);
}
VOID
NTAPI
ExpDesktopDelete(PVOID DeletedObject)
{
WIN32_DELETEMETHOD_PARAMETERS Parameters;
/* Fill out the callback structure */
Parameters.Object = DeletedObject;
ExpWin32SessionCallout(DeletedObject,
ExpDesktopObjectDelete,
&Parameters);
}
NTSTATUS
NTAPI
ExpDesktopOpen(IN OB_OPEN_REASON Reason,
IN PEPROCESS Process OPTIONAL,
IN PVOID ObjectBody,
IN ACCESS_MASK GrantedAccess,
IN ULONG HandleCount)
{
WIN32_OPENMETHOD_PARAMETERS Parameters;
Parameters.OpenReason = Reason;
Parameters.Process = Process;
Parameters.Object = ObjectBody;
Parameters.GrantedAccess = GrantedAccess;
Parameters.HandleCount = HandleCount;
return ExpWin32SessionCallout(ObjectBody,
ExpDesktopObjectOpen,
&Parameters);
}
VOID
NTAPI
ExpDesktopClose(IN PEPROCESS Process OPTIONAL,
IN PVOID Object,
IN ACCESS_MASK GrantedAccess,
IN ULONG ProcessHandleCount,
IN ULONG SystemHandleCount)
{
WIN32_CLOSEMETHOD_PARAMETERS Parameters;
Parameters.Process = Process;
Parameters.Object = Object;
Parameters.AccessMask = GrantedAccess;
Parameters.ProcessHandleCount = ProcessHandleCount;
Parameters.SystemHandleCount = SystemHandleCount;
ExpWin32SessionCallout(Object,
ExpDesktopObjectClose,
&Parameters);
}
CODE_SEG("INIT")
BOOLEAN
NTAPI
ExpWin32kInit(VOID)
{
OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
UNICODE_STRING Name;
NTSTATUS Status;
DPRINT("Creating Win32 Object Types\n");
/* Create the window station Object Type */
RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
RtlInitUnicodeString(&Name, L"WindowStation");
ObjectTypeInitializer.Length = sizeof(ObjectTypeInitializer);
ObjectTypeInitializer.GenericMapping = ExpWindowStationMapping;
ObjectTypeInitializer.PoolType = NonPagedPool;
ObjectTypeInitializer.DeleteProcedure = ExpWinStaObjectDelete;
ObjectTypeInitializer.ParseProcedure = ExpWinStaObjectParse;
ObjectTypeInitializer.OkayToCloseProcedure = ExpWindowStationOkToClose;
ObjectTypeInitializer.SecurityRequired = TRUE;
ObjectTypeInitializer.InvalidAttributes = OBJ_OPENLINK |
OBJ_PERMANENT |
OBJ_EXCLUSIVE;
ObjectTypeInitializer.ValidAccessMask = STANDARD_RIGHTS_REQUIRED;
Status = ObCreateObjectType(&Name,
&ObjectTypeInitializer,
NULL,
&ExWindowStationObjectType);
if (!NT_SUCCESS(Status)) return FALSE;
/* Create desktop object type */
RtlInitUnicodeString(&Name, L"Desktop");
ObjectTypeInitializer.GenericMapping = ExpDesktopMapping;
ObjectTypeInitializer.DeleteProcedure = ExpDesktopDelete;
ObjectTypeInitializer.ParseProcedure = NULL;
ObjectTypeInitializer.OkayToCloseProcedure = ExpDesktopOkToClose;
ObjectTypeInitializer.OpenProcedure = ExpDesktopOpen;
ObjectTypeInitializer.CloseProcedure = ExpDesktopClose;
Status = ObCreateObjectType(&Name,
&ObjectTypeInitializer,
NULL,
&ExDesktopObjectType);
if (!NT_SUCCESS(Status)) return FALSE;
return TRUE;
}
/* EOF */