Re: UDP data

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On Thu, Feb 10, 2011 at 9:41 AM, Glynn Clements
<glynn@xxxxxxxxxxxxxxxxxx> wrote:
>
> Randi wrote:
>
>> > Yes the checksum is for the header and data.
>> > Keep in mind that the checksum value is optional in ipv4, but required in ipv6.
>>
>> Chris, optional means it can be enable or not, how to enable it and get
>> the headehttps://mail.google.com/mail/?shva=1#inbox/12e0da8d716c914er 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@xxxxxxxxxxxxxxxxxx>
> --
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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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