C++: Get MAC address of network adapters on Vista?

Question

We are currently using the NetBios method, and it works ok under XP. Preliminary tests under Vista show that it also works, but there are caveats - NetBIOS has to be present, for instance, and from what I've been reading, the order of the adapters is bound to change. Our alternative method - with SNMPExtensionQuery - seems to be broken under Vista.

The question is: do you know of a reliable way to get a list of the local MAC addresses on a Vista machine? Backwards compatibility with XP is a plus (I'd rather have one single method than lots of ugly #ifdef's). Thanks!

Answer 1

This will give you a list of all MAC addresses on your computer. It will work with all versions of Windows as well:

void getdMacAddresses(std::vector<std::string> &vMacAddresses;)
{
    vMacAddresses.clear();
    IP_ADAPTER_INFO AdapterInfo[32];       // Allocate information for up to 32 NICs
    DWORD dwBufLen = sizeof(AdapterInfo);  // Save memory size of buffer
    DWORD dwStatus = GetAdaptersInfo(      // Call GetAdapterInfo
    AdapterInfo,                 // [out] buffer to receive data
    &dwBufLen);                  // [in] size of receive data buffer

    //No network card? Other error?
    if(dwStatus != ERROR_SUCCESS)
        return;

    PIP_ADAPTER_INFO pAdapterInfo = AdapterInfo;
    char szBuffer[512];
    while(pAdapterInfo)
    {
        if(pAdapterInfo->Type == MIB_IF_TYPE_ETHERNET)
        {
            sprintf_s(szBuffer, sizeof(szBuffer), "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x"
                , pAdapterInfo->Address[0]
                , pAdapterInfo->Address[1]
                , pAdapterInfo->Address[2]
                , pAdapterInfo->Address[3]
                , pAdapterInfo->Address[4]
                , pAdapterInfo->Address[5]
                );
            vMacAddresses.push_back(szBuffer);
        }
        pAdapterInfo = pAdapterInfo->Next;

    }
}