From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Astua <dastuam@gmail.com>
Subject: Re: UDP data
Date: Thu, 10 Feb 2011 12:43:38 -0600
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To: Randi <nightdecoder@gmail.com>
Cc: linux-c-programming@vger.kernel.org

On Thu, Feb 10, 2011 at 9:41 AM, Glynn Clements
<glynn@gclements.plus.com> wrote:
>
> Randi wrote:
>
>> > Yes the checksum is for the header and data.
>> > Keep in mind that the checksum value is optional in ipv4, but requ=
ired in ipv6.
>>
>> Chris, optional means it can be enable or not, how to enable it and =
get
>> the headehttps://mail.google.com/mail/?shva=3D1#inbox/12e0da8d716c91=
4er to verify the checksum.
>
> Checksums are enabled by default. You can disable checksums when
> sending using the SO_NO_CHECK option. On receipt, the kernel will
> verify the checksum if it's present, and discard the packet if there
> is an error.
>
> --
> Glynn Clements <glynn@gclements.plus.com>
> --
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>

Also keep in mind that the check is for individual frames, even
checking that there's no certainty that all frames will arrive.

  -- David A.
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