Re: Regarding PXE boot NACK error.

[Tomas Pilar <tpilar@solarflare.com>]

Hi,

I assume you had a look at the DHCP RFC: https://tools.ietf.org/html/rfc2131. We have an automated test inhouse for testing PXE client implementations and the current UEFI upstream does not pass the various conformance requirements (number of retries, the various timeouts etc.) This does not cause functional problems right now because it's just a matter of error paths not being strictly compliant.

Nevertheless I would recommend that if you are making changes to the PxeBc stuff, I would try to follow the appropriate specs.

Cheers,
Tom

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of MohammadYounasKhan.P@Dell.com
Sent: 18 March 2019 09:40
To: edk2-devel <edk2-devel@lists.01.org>
Cc: Sriramkumar.Raju@dell.com; KarunakarPoosapalli@Dell.com; Shekar.Babu.S@dell.com
Subject: Re: [edk2] Regarding PXE boot NACK error.

Is there anybody who knows about it and help me on this?

Thank you,
Younas.

-----Original Message-----
From: edk2-devel <edk2-devel-bounces@lists.01.org> On Behalf Of Pathan, MohammadYounasKhan
Sent: Sunday, March 10, 2019 11:19 PM
To: edk2-devel@lists.01.org
Cc: S, Shekar Babu; Poosapalli, Karunakar; Raju, SriramKumar
Subject: Re: [edk2] Regarding PXE boot NACK error.


[EXTERNAL EMAIL] 

Hi All,

Do you have any comments on this?

Thank you,
Younas.
-----Original Message-----
From: edk2-devel <edk2-devel-bounces@lists.01.org> On Behalf Of Pathan, MohammadYounasKhan
Sent: Thursday, March 7, 2019 11:07 PM
To: edk2-devel@lists.01.org
Cc: Raju, SriramKumar; Poosapalli, Karunakar; S, Shekar Babu
Subject: [edk2] Regarding PXE boot NACK error.


[EXTERNAL EMAIL] 

Hi All,

When one of DHCP cum PXE server which is not configured properly and returns NACK.

When PxeBcDhcp4Dora() returns EFI_TIME_OUT and PxeBcSelectBootPrompt () returns EFI_NOT_FOUND, do we need to abort the DHCP transaction or not in PxeBcDiscoverBootFile()? Or should we retry?
Currently it calls PxeBcDhcp4BootInfo() to get the boot info.

PxeBcDhcp4CallBack is getting called 2 times:

Dhcp4Event: 0x1 (Dhcp4RcvdOffer)
Dhcp4Event: 0xC (Dhcp4Fail)

Do we need to retry PxeBcDhcp4CallBack() for more times even if it is Dhcp4Fail?

EfiPxeLoadFile() -> PxeBcLoadBootFile () -> PxeBcDiscoverBootFile() -> PxeBcSelectBootPrompt()

Attached the transaction debug log for reference.
Please share your comments.

Thank you,
Younas.
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