Re: Mac address with Win32 bindings.

["Steve" <nospam_steved94@comcast.net>]

Converting the example at
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netbios/netbios_1l82.asp
to Ada:

with Ada.Strings.Fixed;
with Ada.Text_IO;
with Win32.Nb30;
with Interfaces;
 use Interfaces;
with Interfaces.C;
with Ada.Unchecked_Conversion;

procedure Show_Mac_Address is

    use type Interfaces.C.unsigned_short;
    use type Interfaces.C.unsigned_char;

    package UInt_Io is
      new Ada.Text_IO.Modular_IO( Win32.UCHAR );

    type NAME_BUFFER_ARRAY is array( 0 .. 29 ) of Win32.nb30.NAME_BUFFER;

    type AStat is
      record
        adapt      : Win32.nb30.ADAPTER_STATUS;
        nameBuffer : NAME_BUFFER_ARRAY;
      end record;
    pragma Convention( C, AStat );

    type AstatAcc is access all Astat;

    function Conv is
      new Ada.Unchecked_Conversion( AstatAcc, Win32.PUCHAR );

    type Byte_Array_Type is array( Positive range <> ) of Unsigned_8;

    function Hex_Chars( Char_Data : Win32.UCHAR ) return String is
      str_buffer : String( 1 .. 32 );
      first_hash : Natural;
      last_hash  : Natural;
    begin
      UInt_Io.Put( str_buffer, Char_Data, 16 );
      first_hash := Ada.Strings.Fixed.Index( str_buffer, "#",
Ada.Strings.Forward );
      last_hash := Ada.Strings.Fixed.Index( str_buffer, "#",
Ada.Strings.Backward );
      return str_buffer( first_hash + 1 .. last_hash - 1 );
    end Hex_Chars;

    ncb       : aliased Win32.Nb30.NCB;
    Ncb_Alias : Byte_Array_Type( 1 .. ncb'Size/8 );
    for Ncb_Alias'Address use ncb'Address;
    Return_Code : Win32.UCHAR;
    Adapter   : aliased AStat;
  begin
    Ncb_Alias := ( others => 0 );
    ncb.ncb_command := Win32.Nb30.NCBRESET;
    ncb.ncb_lana_num := 0;

    Return_Code := Win32.Nb30.Netbios( ncb'UNCHECKED_ACCESS );
    Ada.Text_IO.Put( "The NCBRESET return code is: " & Hex_Chars(
Return_Code ) );
    Ada.Text_IO.New_Line;

    Ncb_Alias := ( others => 0 );
    ncb.ncb_command := Win32.Nb30.NCBASTAT;
    ncb.ncb_lana_num := 0;
    ncb.ncb_callname := ( 0 => Character'Pos('*'), others => Character'Pos('
') );
    ncb.ncb_buffer := Conv( Adapter'Access );
    ncb.ncb_length := Adapter'Size / 8;

    Return_Code := Win32.Nb30.Netbios( ncb'Unchecked_Access );

    Ada.Text_IO.Put( "The NCBASTAT return code is: " & Hex_Chars(
Return_Code ) );
    Ada.Text_IO.New_Line;

    if Return_Code = 0 then
      Ada.Text_IO.Put( "The Ethernet Number is: " );
      Ada.Text_IO.Put( Hex_Chars( Adapter.adapt.adapter_address(0) ) & "-" &
                       Hex_Chars( Adapter.adapt.adapter_address(1) ) & "-" &
                       Hex_Chars( Adapter.adapt.adapter_address(2) ) & "-" &
                       Hex_Chars( Adapter.adapt.adapter_address(3) ) & "-" &
                       Hex_Chars( Adapter.adapt.adapter_address(4) ) & "-" &
                       Hex_Chars( Adapter.adapt.adapter_address(5) ) );
      Ada.Text_IO.New_Line;
    end if;

end Show_Mac_Address;

For things to link correctly with GNAT you must specify the netabp32
library:

gnatmake Show_Mac_Address -largs -lnetapi32

I hope this helps,
Steve
(The Duck)


"Alex Xela" <xela2@free.fr> wrote in message
news:3fad244e$0$27572$626a54ce@news.free.fr...
> Hi,
>
> I 'm looking for some Ada stuff to get the Mac Address under WindowsNT/XP
> (using bindingWin32 -> function Win32.Nb30.Netbios())
>
> I tried in vain to write it, but honestly, I'm not a win32 API guru......
>
> Thanks.
>
> Alex.
>
>