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Read Hardware MAC-Address

Posted on 2004-04-23
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Last Modified: 2010-04-05
Hi All!

I was just wondering if there was a way to read the original MAC-address that was burned into the Network Card. I am (almost too) aware that there is ways to change the MAC-Address of a NIC in the Windows registry, so I am looking for a way to query the physical (original) manufacturer-specified MAC.

Thanks in advance,

Enune
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Question by:enune
11 Comments
 
LVL 12

Expert Comment

by:Ivanov_G
ID: 10897200
function CoCreateGuid(var guid: TGUID): HResult; stdcall; far external 'ole32.dll';

function Get_MACAddress: string;
var
  g: TGUID;
  i: Byte;
begin
  Result := '';
  CoCreateGUID(g);
  for i := 2 to 7 do
    Result := Result + IntToHex(g.D4[i], 2);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Label1.Caption := Get_MACAddress;
end;
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LVL 12

Expert Comment

by:Ivanov_G
ID: 10897235
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LVL 11

Expert Comment

by:calinutz
ID: 10897483
uses NB30;

function GetMACAdress: string;
var
  NCB: PNCB;
  Adapter: PAdapterStatus;

  URetCode: PChar;
  RetCode: char;
  I: integer;
  Lenum: PlanaEnum;
  _SystemID: string;
  TMPSTR: string;
begin
  Result    := '';
  _SystemID := '';
  Getmem(NCB, SizeOf(TNCB));
  Fillchar(NCB^, SizeOf(TNCB), 0);

  Getmem(Lenum, SizeOf(TLanaEnum));
  Fillchar(Lenum^, SizeOf(TLanaEnum), 0);

  Getmem(Adapter, SizeOf(TAdapterStatus));
  Fillchar(Adapter^, SizeOf(TAdapterStatus), 0);

  Lenum.Length    := chr(0);
  NCB.ncb_command := chr(NCBENUM);
  NCB.ncb_buffer  := Pointer(Lenum);
  NCB.ncb_length  := SizeOf(Lenum);
  RetCode         := Netbios(NCB);

  i := 0;
  repeat
    Fillchar(NCB^, SizeOf(TNCB), 0);
    Ncb.ncb_command  := chr(NCBRESET);
    Ncb.ncb_lana_num := lenum.lana[I];
    RetCode          := Netbios(Ncb);

    Fillchar(NCB^, SizeOf(TNCB), 0);
    Ncb.ncb_command  := chr(NCBASTAT);
    Ncb.ncb_lana_num := lenum.lana[I];
    // Must be 16
    Ncb.ncb_callname := '*               ';

    Ncb.ncb_buffer := Pointer(Adapter);

    Ncb.ncb_length := SizeOf(TAdapterStatus);
    RetCode        := Netbios(Ncb);
    //---- calc _systemId from mac-address[2-5] XOR mac-address[1]...
    if (RetCode = chr(0)) or (RetCode = chr(6)) then
    begin
      _SystemId := IntToHex(Ord(Adapter.adapter_address[0]), 2) + '-' +
        IntToHex(Ord(Adapter.adapter_address[1]), 2) + '-' +
        IntToHex(Ord(Adapter.adapter_address[2]), 2) + '-' +
        IntToHex(Ord(Adapter.adapter_address[3]), 2) + '-' +
        IntToHex(Ord(Adapter.adapter_address[4]), 2) + '-' +
        IntToHex(Ord(Adapter.adapter_address[5]), 2);
    end;
    Inc(i);
  until (I >= Ord(Lenum.Length)) or (_SystemID <> '00-00-00-00-00-00');
  FreeMem(NCB);
  FreeMem(Adapter);
  FreeMem(Lenum);
  GetMacAdress := _SystemID;
end;



procedure TForm1.Button1Click(Sender: TObject);
begin
  label1.Caption := GetMACAdress;
end;
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LVL 12

Expert Comment

by:Ivanov_G
ID: 10897768

    calinutz, the same as the link in my post above ...
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Author Comment

by:enune
ID: 10945113
Sorry guys, but those solutions still return the spoofed MAC if a user has set the correct registry keys... Also, Ivanov_G - Your first solution generates a random MAC address! I hardly think that'd help me =)

Does anyone know of any calls for this? I'd be willing to write a helperDLL in C/C++ if I had to do it that way.
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Author Comment

by:enune
ID: 11200169
C'mon people! I'll up the points to 400 if someone can provide a solution to this problem =)
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Author Comment

by:enune
ID: 11412510
Cleanup time - This question either will not or can not be answered.. Would a mod care to close?

Regards,

Enune
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Author Comment

by:enune
ID: 13189617
A refund would be good, as no correct answer was provided.

Thank you,
Calum
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Accepted Solution

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PAQ_Man earned 0 total points
ID: 15015559
PAQed with points refunded (125)

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