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

  • According to a 2014 Javelin Strategy & Research Study, there is a new victim of fraud every two seconds – and that's just in the U.S. With identity theft and consumer fraud rising, and more frequent and sizable data breaches in the news, financial institutions need to work harder than ever to protect their customers and their business. Download this white paper to learn how you can use multi-channel communications to minimize the costs of fraud while also increasing customer loyalty.

  • Today, users, applications, and data exist in more places than ever before, creating an unprecedented challenge for IT. How can IT achieve the flexibility and agility it needs to offer multiple types of applications in multiple locations? To better serve business demands for information everywhere, enterprises must develop new strategies for optimizing multiple kinds of networks. Read this white paper to learn how hybrid networks provide an unprecedented level of network dynamism, enterprise agility, and the …

Most Popular Programming Stories

More for Developers

RSS Feeds

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