[syslinux] [5.xx-6.01] broken PXE with HTTP

[Gene Cumm]

On Jul 8, 2013 5:34 PM, "H. Peter Anvin" <hpa at zytor.com> wrote:
> On 07/05/2013 01:02 PM, Gerardo Exequiel Pozzi wrote:
> >
> > 5.00      [pxelinux.0]  OK 5.01      [pxelinux.0]  OK 5.02-pre1
> > [pxelinux.0]  OK 5.02-pre2 [pxelinux.0]  OK 5.02-pre3 [pxelinux.0]
> > BAD (freeze, no error messages, 100% CPU used)
> >
> > 5.10-pre1 [pxelinux.0]  BAD (freeze, no error messages, 100% CPU
> > used) 5.10-pre2 [pxelinux.0]  BAD (Failed to load: ldlinux.c32,
> > Boot failed:) 5.10      [pxelinux.0]  BAD (Failed to load:
> > ldlinux.c32, Boot failed:)
> >
> > 6.00      [pxelinux.0]  BAD (Failed to load: ldlinux.c32, Boot
> > failed:) 6.01      [pxelinux.0]  BAD (Failed to load: ldlinux.c32,
> > Boot failed:)
> >
> >
> > 5.10-pre1 [lpxelinux.0] BAD (freeze, no error message, cpu idle)
> > 5.10-pre2 [lpxelinux.0] BAD (no error message, Boot failed:) 5.10
> > [lpxelinux.0] BAD (no error message, Boot failed:)
> >
> > 6.00      [lpxelinux.0] BAD (no error message, Boot failed:) 6.01
> > [lpxelinux.0] BAD (no error message, Boot failed:)
> >
> >
> > OK: implies that pxelinux tries to retrive others files like
> > ldlinux.c32 BAD: no more files are retrived, there is not attemp at
> > least to GET any file from server.
> >
> > Maybe something wrong with b208ba467f678ed8e73f8d11fc0609634120cb83
> > ?
> >
>
> So we have a bit of a special situation here... iPXE is used to
> download lpxelinux.0 via HTTP, and then we need to pick up and use
> HTTP protocol.
>
> What hardware is this, and do you know what iPXE build?

qemu-1.5.1; iPXE likely from the same.  Matches commit 09c5109b

> There seem to be odd interactions between iPXE and the lwip code.
> Unfortunately iPXE version numbers are useless, so it is hard to track
> down specifics.

The only specifics I recall seeing in packet captures is that even
though lwIP is using UNDI to open a TCP socket on a port, iPXE steps
in and says that port is closed.

--
-Gene