[syslinux] pxelinux implementation questions

[H. Peter Anvin]

Alexander Sack wrote:
> 
> Hmmm.  Does the tftp daemon that runs on the boot server have to deal
> with wrap around issues at all? 
> 

Yes, it does.

>
> Basically you would just keep on ACKing until you hit a payload of under
> 512 bytes meaning your done, right?  I just got confused because I
> didn't see any code regarding wrap around issues!
> 

Yep.  Usually the wraparound is dealt with "automatically."

> The other issue that I'm looking at is using PXE to download an
> arbitraty block of a file.  In other words I want to download one sector
> at 33MB of a 34MB file.  I was looking at searchdir() just to get some
> ideas if this can even be done!

Nope, can't be done.  Not without a completely new protocol; perhaps a
"random access" extension to TFTP.

> Yes, I definitely feel your pain when it comes to mtftp pxelinux!

	-hpa