Re: [PATCH RFC] net/macb: Fix UDPv4 checksum offload
From: David Miller
Date: Tue Apr 28 2015 - 16:48:04 EST
From: Jaeden Amero <jaeden.amero@xxxxxx>
Date: Tue, 28 Apr 2015 15:36:54 -0500
> On 04/27/2015 09:47 PM, David Miller wrote:
>> From: Jaeden Amero <jaeden.amero@xxxxxx>
>> Date: Mon, 27 Apr 2015 17:43:30 -0500
>> A UDP checksum of zero, means "checksum not computed". And your
>> device isn't computing the checksum at all, but rather is leaving it
>> at zero.
> The "zero" checksum is not what gets sent over the wire. Independent of
> the value of the checksum field, hardware generates a correct checksum
> for payloads of 3 or more bytes. The bug is that hardware generates an
> incorrect checksum for payloads of 2 or less bytes, unless the checksum
> field is zeroed.
Ok, then you need to add a comment here, because other people might come
to the same conclusion I did.
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