Function GetMacAddress

rEFIt_UEFI/Platform/Net.cpp:70–232

 */

VOID
GetMacAddress()
{
  EFI_STATUS                  Status;
  EFI_MAC_ADDRESS             MacAddr;
  UINT8                       *HwAddress;
  UINTN                       HwAddressSize;
  UINTN                       Index, Index2;
  EFI_HANDLE                  *HandleBuffer;
  UINTN                       NumberOfHandles;
  EFI_DEVICE_PATH_PROTOCOL    *Node;
  EFI_DEVICE_PATH_PROTOCOL    *DevicePath;
  MAC_ADDR_DEVICE_PATH        *MacAddressNode;
  BOOLEAN                     Found;
  BOOLEAN                     Swab;
  UINT16                      PreviousVendor = 0;
  UINT32                      Mac0, Mac4;
  UINTN                       Offset;

  HwAddressSize = 6;
  //
  // Locate Service Binding handles.
  //
  NumberOfHandles = 0;
  HandleBuffer = NULL;
  Status = gBS->LocateHandleBuffer (
                                    ByProtocol,
                                    &gEfiDevicePathProtocolGuid,
                                    NULL,
                                    &NumberOfHandles,
                                    &HandleBuffer
                                    );
  if (EFI_ERROR(Status)) {
    return;
  }

  DbgHeader("GetMacAddress");

  Found = FALSE;
  for (Index = 0; Index < NumberOfHandles; Index++) {
    Node = NULL;
    Status = gBS->HandleProtocol (
                                  HandleBuffer[Index],
                                  &gEfiDevicePathProtocolGuid,
                                  (VOID **) &Node
                                  );
    if (EFI_ERROR(Status)) {
      continue;
    }
    DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Node;

    //
    while (!IsDevicePathEnd (DevicePath)) {
      if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&
          (DevicePathSubType (DevicePath) == MSG_MAC_ADDR_DP)) {
        //
        // Get MAC address.
        //