[syslinux] core_udp_sendto: no mapping

[Joakim Tjernlund]

On Mon, 2017-11-27 at 18:18 -0500, Gene Cumm 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.
> 
> 
> On Mon, Nov 27, 2017 at 6:07 PM, Joakim Tjernlund
> <Joakim.Tjernlund at infinera.com> wrote:
> > On Mon, 2017-11-27 at 18:03 -0500, Gene Cumm wrote:
> > > On Mon, Nov 27, 2017 at 2:14 PM, Gene Cumm <gene.cumm at gmail.com> wrote:
> > > > On Mon, Nov 27, 2017 at 12:07 PM, Joakim Tjernlund
> > > > <Joakim.Tjernlund at infinera.com> wrote:
> > > > > On Mon, 2017-11-27 at 08:42 -0500, Gene Cumm wrote:
> > > > > > Bringing the discussion to the list.
> > > > > > 
> > > > > > You stated you see the following on your Lenovo ThinkPad T470s with
> > > > > > UEFI firmware N1WET41W (1.20 date: 10/17/2017):
> > > > > > 
> > > > > > 
> > > > > >   core_udp_sendto: stalling on configure with no mapping
> > > > > > 
> > > > > > 
> > > > > > OUI 54-E1-AD
> > > > > > 
> > > > > > lspci -s 0:1f.6 -v
> > > > > > 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4)
> > > > > > I219-V (rev 21)
> > > > > >         Subsystem: Lenovo Ethernet Connection (4) I219-V
> > > > > >         Flags: bus master, fast devsel, latency 0, IRQ 125
> > > > > >         Memory at dc200000 (32-bit, non-prefetchable) [size=128K]
> > > > > >         Capabilities: [c8] Power Management version 3
> > > > > >         Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
> > > > > >         Capabilities: [e0] PCI Advanced Features
> > > > > >         Kernel driver in use: e1000e
> > > > > >         Kernel modules: e1000e
> > > > > > 
> > > > > > This might be the only wired NIC but there's possibly multiple device
> > > > > > handles to it and possibly a device handle to the wrong NIC
> > > > > > (wireless).
> > > > > > 
> > > > > > In your EFI shell (hopefully you have such an option):
> > > > > > 
> > > > > > version > fs0:\efi-ver.txt
> > > > > > dh -p Net > fs0:\efi-dh-net.txt
> > > > > > 
> > > > > > Feel free to run it without the redirect (">") to see the results
> > > > > > yourself.  The redirects would help if you can access the files so you
> > > > > > don't need to manually transcribe the output.
> > > > > > 
> > > > > > Here's some other UEFI Shell commands that may be of use:
> > > > > > 
> > > > > > guid > fs0:\efi-guid.txt
> > > > > >   or     alias > fs0:\efi-alias.txt
> > > > > > dh > fs0:\efi-dh.txt
> > > > > 
> > > > > Managed to install an EFI shell from here:
> > > > >  https://github.com/tianocore/edk2/blob/master/ShellBinPkg/UefiShell/X64/Shell.efi
> > > > > 
> > > > > and got a dh > dh.txt
> > > > > I don't know what to do with this info so attaching it here.
> > > > 
> > > > Ok.  Different GUID aliases.  Line 1381 says what I see as "Net" you
> > > > likely see as "SimpleNetwork".  This handle has the necessary
> > > > "UDPv4ServiceBinding" (I see as "UDPv4Sb").
> > > > 
> > > > Thanks for the excellent data.  It's been a while since I looked at
> > > > the handle search code to debug this.
> > > 
> > > Did you ever see a "disable UseDefaultAddress" message?  The code
> > > should have printed those original messages dump the new message then
> > > try again at doing the network transaction.
> > 
> > Yes, that was the last message I think. Then, after a while, it rebooted.
> > I figured the names(Net vs. SimpleNetwork) to search for was standardized?
> 
> That's a partially good thing.  This says it tried to bind UDP where
> we got PXE, failed, hunted for something that provides UDP on the same
> MAC, found it, attempted to use the UseDefaultAddress flag, failed to
> configure, and fell back to attempting to manually configure the
> entire UDP datagram.  At this point, it should have just worked.
> 
> The aliases/names aren't entirely standardized and it's just a
> friendly name for the GUID (which is standardized).  The aliases could
> easily be localized though I believe there's only 2 common groups, the
> two we see here.
> 
> Did you happen to peek at the version command?  I'm guessing it's
> saying 2.0 since the UDPv4Sb is not on the same handle as the PxeBc.

Gene, I am curious, do you have an idea how to fix this?

 Jocke