reactos/ntoskrnl/lpc/query.c

   1 /* $Id: query.c,v 1.1 2000/06/04 17:27:39 ea Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/lpc/query.c
   6  * PURPOSE:         Communication mechanism
   7  * PROGRAMMER:      David Welch (welch@cwcom.net)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15 #include <internal/ob.h>
  16 #include <string.h>
  17 #include <internal/string.h>
  18 #include <internal/port.h>
  19 #include <internal/dbg.h>
  20
  21 #define NDEBUG
  22 #include <internal/debug.h>
  23
  24
  25 /**********************************************************************
  26  * NAME                                                 EXPORTED
  27  *      NtQueryInformationPort@20
  28  *
  29  * DESCRIPTION
  30  *
  31  * ARGUMENTS
  32  *      PortHandle              [IN]
  33  *      PortInformationClass    [IN]
  34  *      PortInformation         [OUT]
  35  *      PortInformationLength   [IN]
  36  *      ReturnLength            [OUT]
  37  *
  38  * RETURN VALUE
  39  *      STATUS_SUCCESS if the call succedeed. An error code
  40  *      otherwise.
  41  *
  42  * NOTES
  43  *      P. Dabak reports that this system service seems to return
  44  *      no information.
  45  */
  46 EXPORTED
  47 NTSTATUS
  48 STDCALL
  49 NtQueryInformationPort (
  50         IN      HANDLE  PortHandle,
  51         IN      CINT    PortInformationClass,
  52         OUT     PVOID   PortInformation,
  53         IN      ULONG   PortInformationLength,
  54         OUT     PULONG  ReturnLength
  55         )
  56 {
  57         NTSTATUS        Status;
  58         PEPORT          Port;
  59
  60         Status = ObReferenceObjectByHandle (
  61                         PortHandle,
  62                         PORT_ALL_ACCESS,   /* AccessRequired */
  63                         ExPortType,
  64                         UserMode,
  65                         (PVOID *) & Port,
  66                         NULL
  67                         );
  68         if (!NT_SUCCESS(Status))
  69         {
  70                 DPRINT("NtQueryInformationPort() = %x\n", Status);
  71                 return (Status);
  72         }
  73         /*
  74          * FIXME: NT does nothing here!
  75          */
  76         ObDereferenceObject (Port);
  77         return STATUS_SUCCESS;
  78 }
  79
  80
  81 /* EOF */