Syslinux - Mar 2008 - finding mac address while in menusystem (com32)

Hi

I have made myself a derivated menusystem based on the complex.c menu that cames
with syslinux.
And now I need to read a file, search for my pxebooted netcards mac address, and
write some changes back to the same file.
All the writing and reading I hopes will be of no trouble, but how can i find my
own mac address? (and IP adress would be nice).

I have searched the list, but I really cannot find any hints on this, so either
I am trying to do something unusual, or I am blind to how to do it!

Thanks for any reply

--Kjetil

Op 03-03-2008 om 11:46 schreef Kjetil.Mikkelborg at
kongsberg.com:
> Hi
> 
> I have made myself a derivated menusystem based on the complex.c menu
> that cames with syslinux.
> And now I need to read a file, search for my pxebooted netcards mac
> address, and write some changes back to the same file.
> All the writing and reading I hopes will be of no trouble, but how
> can i find my own mac address? (and IP adress would be nice).
> 
> I have searched the list, but I really cannot find any hints on this,
> so either I am trying to do something unusual, or I am blind to how
> to do it!
What I remember for reading this list, there were some ideas about
reading the PXE structure that the PXE stack provides.

So keywords for search the list archive again would be
  PXE structure stack


Cheers
Geert Stappers

<Kjetil.Mikkelborg at kongsberg.com> writes:
> how can i find my own mac address? (and IP adress would be nice).
See com32/modules/linux.c for example.
-- 
Regards,
Feri.

Kjetil.Mikkelborg at kongsberg.com wrote:
> Hi
> 
> I have made myself a derivated menusystem based on the complex.c menu that
cames with syslinux.
> And now I need to read a file, search for my pxebooted netcards mac
address, and write some changes back to the same file.
> All the writing and reading I hopes will be of no trouble, but how can i
find my own mac address? (and IP adress would be nice).
> 
> I have searched the list, but I really cannot find any hints on this, so
either I am trying to do something unusual, or I am blind to how to do it!
> 
There are three ways to do it:

a) the easy way:

    * Use syslinux_ipappend_strings() (from <syslinux/config.h>)

    This gets you the ip= and BOOTIF= strings, which contain your
    ip address and hardware address, respectively.

b) the hard way:

    * pxe_get_cached_info() gets you the DHCP information
      (from <syslinux/pxe.h>).

    This includes both your IP address and the hardware address.  Do note
    that the hardware address can be encoded in two different ways,
    depending on the underlying medium (e.g. Infinibad does it
    differently than Ethernet.)

    This is effectively what PXELINUX does internally.

c) the really hard way:

    * Use pxe_get_cached_info() to get the IP address, and PXE call
      0x000C (PXENV_UNDI_GET_INFORMATION) to get the hardware address.

    I don't have a librarized version of PXENV_UNDI_GET_INFORMATION at
    this time.

	-hpa