win32ss/user/consrv/server.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Console Server DLL
   4  * FILE:            win32ss/user/consrv/init.c
   5  * PURPOSE:         Server APIs
   6  * PROGRAMMERS:     Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   7  */
   8
   9 #include "consrv.h"
  10
  11 #define NDEBUG
  12 #include <debug.h>
  13
  14 #if 0
  15 /* Ensure that a captured buffer is safe to access */
  16 BOOL FASTCALL
  17 Win32CsrValidateBuffer(PCSR_PROCESS ProcessData, PVOID Buffer,
  18                        SIZE_T NumElements, SIZE_T ElementSize)
  19 {
  20     /* Check that the following conditions are true:
  21      * 1. The start of the buffer is somewhere within the process's
  22      *    shared memory section view.
  23      * 2. The remaining space in the view is at least as large as the buffer.
  24      *    (NB: Please don't try to "optimize" this by using multiplication
  25      *    instead of division; remember that 2147483648 * 2 = 0.)
  26      * 3. The buffer is DWORD-aligned.
  27      */
  28     ULONG_PTR Offset = (BYTE *)Buffer - (BYTE *)ProcessData->ClientViewBase;
  29     if (Offset >= ProcessData->ClientViewBounds
  30             || NumElements > (ProcessData->ClientViewBounds - Offset) / ElementSize
  31             || (Offset & (sizeof(DWORD) - 1)) != 0)
  32     {
  33         DPRINT1("Invalid buffer %p(%u*%u); section view is %p(%u)\n",
  34                 Buffer, NumElements, ElementSize,
  35                 ProcessData->ClientViewBase, ProcessData->ClientViewBounds);
  36         return FALSE;
  37     }
  38     return TRUE;
  39 }
  40 #endif
  41
  42 /* EOF */