[syslinux] alternate tftp server

[a178235]

  It appears that you are the author of bioschk.asm and lmcheck.asm? I find bioschk.asm very useful and would like to know what other modules that Carnegie Mellon University is using. Now that loading Linux with gPXELinux works over HTTP, it would be great to do the same thing with WinPE. Would you be willing to share with us the boot order that you are currently using?
  It would also be nice if bioschk.cbt became part of the SYSLINUX package as well as other tested and working modules.
  
Jeffrey Hutzelman <jhutz at cmu.edu> wrote:
  --On Wednesday, April 02, 2008 03:28:56 PM -0400 Jeffrey Hutzelman 
wrote:

> --On Wednesday, April 02, 2008 11:50:55 AM -0700 "H. Peter Anvin"
> wrote:
>
>> Jacob Alifrangis wrote:
>>> Startrom is actually getting this information from the BINLSVC service
>>> or "Boot Information Negotiation Layer" this service broadcasts a
>>> packet to 255.255.255.255 or to $ipaddress, I'm not sure. What is
>>> definite is that the packet contains the location of the boot loader
>>> wdsnbp.com or an equivalent pxe code file, determined by the
>>> architecture that is detected by startrom.com, this is done by issuing
>>> an assembler instruction that detects 64bit mode.
>>
>> BINL is just butchered DHCP.
>>
>> Supposedly, one can edit the DHCP/BINL packets inside the PXE stack, but
>> it is known not to work for some PXE stacks. I'm considering writing a
>> COM32 module to do this editing and then chainload a PXE module.
>
> I did this as a comboot module a while back; we use it to support booting
> RIS from pxelinux, as well as booting a new pxelinux with a different
> configuration directory (very convenient for using OS installer images
> as-is). As the source is only 10K, I've attached it.

I should note that while I haven't tried this with a wide variety of PXE 
stacks, I haven't gotten any complaints, either. I haven't tested this 
with gPXE, but I do expect it to work there.

-- Jeff

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