[U-Boot] dhcp command not populating dnsip environment variable

[Duncan Hare]

 From: Joe Hershberger <joe.hershberger at ni.com>
 To: Duncan Hare <dh at synoia.com> 
Cc: u-boot <u-boot at lists.denx.de>; Joe Hershberger <joe.hershberger at ni.com>
 Sent: Thursday, March 15, 2018 1:29 PM
 Subject: Re: [U-Boot] dhcp command not populating dnsip environment variable
   
On Thu, Mar 15, 2018 at 3:25 PM, Duncan Hare <dh at synoia.com> wrote:
> In the latest version of u-boot, the dhcp command appears not to
> populate the environment variable dnsip. This used to be the behaviour.

Is it possible that your DHCP server isn't sending it? It seems like
the code isn't changed.

>
> The dns command works, if dnsip is populated manually.
>
> Is the a Kconfig variable controlling this? Or is there a new
> environment variable?
>
> Thanks
>
> Duncan Hare
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> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot


Joe
Thanks, you gave me an idea.

I fired up wireshark
See attached.

Old release: Before Kconfig work options requested (many) including DNS server address

After: No options

I see no where in u-boot to set DHCP options. 

Kconfig is a good idea. HOWEVER, the previous defaults should be selected as the base set. 
Choosing The NULL set is a very unfriendly choice.

What do we do to resolve this?
 Duncan Hare

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