Syslinux - Oct 2007 - How get DHCP-/BOOTP-Options with MEMDISK

Using PXELINUX and MEMDISK I started a MS-DOS-Diskimage.

How can I get the DHCP-Options or BOOTP-Tags from within MS-DOS?? (Like bppatch
from 3com.)

Thanks!
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I don't know if this is what you need but to retrieve environment for 
memdisk here is what i do :

in the pxelinux configuration file i declare argument on the append line

append initrd=xxxx  sp-a=20-30

then in the dos autoexec.bat i use getargs.com :

echo Retrieving Environnment from MEMDISK
getargs > getenv.bat
call getenv.bat


This will setup environement variable that you can to use then :

echo %sp-a%

i hope this can to help you

regards
Stephane Maillan

Kai Straube wrote:
> Using PXELINUX and MEMDISK I started a MS-DOS-Diskimage.
>
> How can I get the DHCP-Options or BOOTP-Tags from within MS-DOS?? (Like
bppatch from 3com.)
>
> Thanks!
> _______________________________________________________________________
> Jetzt neu! Sch?tzen Sie Ihren PC mit McAfee und WEB.DE. 3 Monate
> kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220
>
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Kai Straube wrote:
> Using PXELINUX and MEMDISK I started a MS-DOS-Diskimage.
> 
> How can I get the DHCP-Options or BOOTP-Tags from within MS-DOS?? (Like
bppatch from 3com.)
You can use the "keeppxe" option to memdisk and then use PXE calls to 
get them.

	-hpa

@stephane maillan
It seams that is a limit in the append line. (Perhaps 512 Byte?)
By this way I must create a "copy" of the Parameters from bootptab to 
the append-line.

@H. Peter Anvin
This is the way I need. I used already "keeppxe" to use the universal 
network driver.
But I don't know what "pxe calls" are, to get the bootp- or 
dhcp-parameters. Is there any DOS-Command to get them?