From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Donovan <alienresidents@gmail.com>
Subject: Re: UDP data
Date: Fri, 11 Feb 2011 07:49:15 +1100
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To: Randi <nightdecoder@gmail.com>
Cc: linux-c-programming@vger.kernel.org

I don't know libc, so I don't know what functions libc has to compute
(if any) the checksum.

I did find this page, that has some sample code though...
http://stackoverflow.com/questions/3737612/raw-socket-sendto-failed-usi=
ng-c-on-linux

Chris-

On Thu, Feb 10, 2011 at 4:14 PM, Randi <nightdecoder@gmail.com> wrote:
> Chris, optional means it can be enable or not, how to enable it and g=
et
> the header to verify the checksum.
>
>
> On Thu, 2011-02-10 at 15:14 +1100, Chris Donovan wrote:
>> Yes the checksum is for the header and data.
>> Keep in mind that the checksum value is optional in ipv4, but requir=
ed in ipv6.
>>
>> Chris-
>>
>> On Thu, Feb 10, 2011 at 2:41 PM, Randi <nightdecoder@gmail.com> wrot=
e:
>> > Hi All,
>> >
>> > =A0 =A0 =A0 =A0Since UDP socket is not reliable, what the common w=
ay in user level to
>> > check UDP communication's data for error (eg. malformed, corrupted=
,
>> > etc.)? is the checksum field in the UDP header (struct udphdr) int=
ended
>> > to this problem?
>> >
>> > =A0 =A0 =A0 =A0Randi
>
>
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