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

  • Thanks to wide spread cloud hosting and innovations small businesses can meet and exceed the legacy systems of goliath corporations. Explore the freedom to work how you want, with a phone system that will adapt to your evolving needs and actually save you lots of expense—read Get an Enterprise Phone System without High Cost and Complexity. The article clearly illustrates: The only hardware you'll need is phone equipment for advanced voice and fax. How to join all your employees, mobile devices, …

  • To help companies compete in this constantly changing business world, finance executives and their teams must be more responsive and focus on delivering greater value. Along with a unique, enterprise-wide business perspective, finance needs simple and agile solutions to solve the next decade's challenges and accommodate the shift to becoming a service organization within the company. This eBook outlines some of the challenges facing organizations like yours and discusses how the right financial management …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date