A New Method to Get MAC/NIC Statistical Information

Environment: Compiled on Visual Studio 6 & Windows XP Pro

Introduction:

In Khalid Shaikh's article, "Three ways to get your MAC address" (2002/04/15), he described three ways to retrieve a MAC address.

The first method is to use the relation between UUID and MAC to retrieve MAC. However, due to security reasons, UUID no longer contains an explicit MAC string. Thus, this method will not work anymore.

The second method is to use NetBIOS, of which Khalid Shaikh has described clearly the pros and cons.

The third method is to use the Windows SDK, which is very easy to use. Also along with MAC information, other configuration information can be retrieved in the same function call.

Due to project requirement, I need to find out a easy/neat way to not only get the configuration information of an interface, but also the dynamic statistic information: how many packages received/sent, how many packages dropped, and so forth. The methods described there cannot provide such information.

After doing some research, I found a good way to collect this information; the by-product is the MAC address.

Code

The code segment is quite straightforward. I only demonstrate how to retrieve MAC here. Check the reference for details of the MIB_IFROW structure if you need to collect the statistic information of NIC.

bool GetMacAddr()
{
  // Retrieve network interface information
  //

  DWORD sizeReq = 0 ;
  PMIB_IFTABLE pInfo = NULL;
  // Get size information
  ::GetIfTable(NULL, &sizeReq, FALSE) ;

  // Allocate required memory
  pInfo = (PMIB_IFTABLE) new BYTE [sizeReq] ;
  memset (pInfo, 0, sizeReq) ;

  DWORD sizeToUse = sizeReq ;

  // Retrieve network interface information
  bool result = ( ::GetIfTable( (PMIB_IFTABLE)pInfo,
       sizeToUse, FALSE) == NO_ERROR );
  if( !result )
  {
    delete (PMIB_IFTABLE)pInfo;
    pInfo = NULL;
    printf(
      "Couldn't retrieve network interface information!");
    return false;
  }

  // Print all interface information
  for( unsigned int index = 0; index <
    ((PMIB_IFTABLE)pInfo)->dwNumEntries; index ++ )
  {
    // Get interface description
    MIB_IFROW& details = ((PMIB_IFTABLE)pInfo)->table[index];
    printf("Interface %d: %s\n", index, (LPCTSTR) details.bDescr );

    // Is this an Ethernet interface?
    if( (details.dwPhysAddrLen == 6)
      && (details.dwType == MIB_IF_TYPE_ETHERNET) )
    {

      // Ethernet MAC address
      printf("     Ethernet: ");
    }
    else    // Other interface
    {
      printf("     Others: ");
    }

    // Format physical address
    char macStr[30];
    for (DWORD j = 0 ; j < details.dwPhysAddrLen ; ++j)
    {
      sprintf( &macStr[j*3], "%02X-", details.bPhysAddr[j] );
    }
    macStr[j*3-1] = '\0';

    // Print out physical address
    printf( "%s\n", &macStr[0] );
  }

  return true;
}

If you have any questions, don't hesitate to e-mail me.

Downloads

Download demo project and source (GetMAC) - 4 Kb
Note: This method uses Windows SDK, Thus, it requires that the Windows SDK be installed in order for it to be compiled.


Comments

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Managing your company's financials is the backbone of your business and is vital to the long-term health and viability of your company. To continue applying the necessary financial rigor to support rapid growth, the accounting department needs the right tools to most efficiently do their job. Read this white paper to understand the 10 essentials of a complete financial management system and how the right solution can help you keep up with the rapidly changing business world.

  • With 81% of employees using their phones at work, companies have stopped asking: "Is corporate data leaking from personal devices?" and started asking: "How do we effectively prevent corporate data from leaking from personal devices?" The answer has not been simple. ZixOne raises the bar on BYOD security by not allowing email data to reside on the device. In addition, Zix allows employees to maintain complete control of their personal device, therefore satisfying privacy demands of valued employees and the …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds