[syslinux] pxechn.c32 does not do TFTP

[Victor Sudakov]

Gene Cumm wrote:
> > > The big thing I notice is just that since 5.10, the
> > > code in pxelinux.0 does DNS queries for specific calls rather than a
> > > dotted quad conversion first.
> >
> > That *was* relevant. It did not work until I replaced the dotted quad
> > address with the DNS name. Thank you. I think a change in the
> > documentation is due.
> 
> It's actually a bug in the core.

This bug has an unpleasant consequence.

The Oracle VirtualBox 4.2.16 PXE impementation does not request Option 6 
from the DHCP server, so it does not receive Option 6 in the DHCP
offer, so no DNS servers are available to pxelinux, therefore it
cannot resolve the WDS server's IP address, which breaks everything.

Can we get rid of this dependency on DNS?

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru