[syslinux] core_udp_sendto: no mapping

[Joakim Tjernlund]

On Wed, 2017-12-13 at 17:15 +0000, Ady Ady via Syslinux wrote:
> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
> 
> 
> > 
> > efistub.jpg:
> > 
> > > > Start PXE over IPv4.
> > 
> >   Station IP address is 192.168.201.185
> > 
> >   Server IP address is 10.210.32.100
> >   NBP filename is pxelinux.0
> >   NBP filesize is 6644000 Bytes
> >  Downloading NBP file...
> > 
> >   Succeed to download NBP file.
> > 
> >  Downloading NBP file...
> > 
> >   Succeed to download NBP file.
> > 
> 
> 
> I will not pretend that I understand all these technical details, but I
> do know one thing: pxelinux.0 is not for UEFI (unless in CSM mode).
> 
> So, here's a (somewhat rhetorical) question: why are "efistub" and
> "pxelinux.0" together in this conversation?

This is because on that network I do not control DHCP servers(Windows) and I cannot
change the file name etc.
So for test I replace pxelinux.0 with syslinux.efi and also put a copy of ldlinux.e64
there.

Some good news, on another network we have linux dhcp servers under control so there
we could change the filename to efi/syslinux.efi and lo and behold, now it works!

I figured EFI would not know the difference of these two methods ?
Note, only tested on this new server. I will test my laptop tmw.

 Jocke