Re[2]: [Dev-C++] Network monitor - Question

[Zodiaq <zo...@ac...>]

Hello Daniel and all Dev-C++ users,

Monday, April 7, 2003, 4:51:04 PM, Daniel wrote as follows:


DG> unsigned long Buffer = 420;  // wrong

LOL! Totally wrong...

DG> unsigned long Buffer[420]; // Horay!

hmmm... you are allocating 420 items of size long... and long is AFAIR
32... nevermind, better is to do it like this:
this is howto for using GetIfTable, but GetIpNetTable is extremly
similar...
PMIB_IFTABLE interfaces = NULL;
DWORD response = GetIfTable( interfaces, &ulRozmiar, FALSE );
if( response == ERROR_INSUFFICIENT_BUFFER )
{
 //cout << "Recommended size: " << ulRozmiar << endl;
 if (!(interfaces = (PMIB_IFTABLE)malloc(ulRozmiar))) {
   //cout << "Insufficient Memory" << endl;
   MessageBox( Hwnd, "Damn, not enough memory!", "Buuuuu", MB_OK | MB_ICONINFORMATION );
   PostQuitMessage( 1 );
   return FALSE;
 }
 response = GetIfTable( interfaces, &ulRozmiar, FALSE );
}
else if( response == ERROR_NOT_SUPPORTED )
{
  MessageBox( Hwnd, "Main program function not supported on this platform", "Błąd...", MB_OK | MB_ICONERROR );
  PostQuitMessage( 1 );
  return FALSE;
}
if( response != NO_ERROR )
{
  MessageBox( Hwnd, "Some straaaange error", "Buuuuu", MB_OK | MB_ICONINFORMATION );
  PostQuitMessage( 1 );
  return FALSE;
}
GetIfTable( interfaces, &ulRozmiar, FALSE );


and now my program remebers that enough memory has been allocated, and
in next calls to obtain new send and received bytes I just use last
line... (ulRozmiar I made global, as interfaces)


DG> So it seems the buffer was overwritten, and the variable m_hWnd was 
DG> overwritten!

DG> Does that seem right?


-- 
regards, Zodiaq