Re: [Sigtran] Abort chunk bundled with data chunk

["Salil Agrawal" <Salil.Agrawal at ccpu.com>]

Thanks Ashwani, 

I understand that it does not make any sense to send the SACK, and abort
chunk should be the placed before the DATA chunk. But the question is if
the ABORT chunk is placed after the DATA chunk in the received packet
then should be send the SACK for the DATA or not.

Thanks, 
Salil


-----Original Message-----
From: Ashwani Kathuria [mailto:ashwani.grps at gmail.com] 
Sent: Thursday, October 15, 2009 12:58 PM
To: Salil Agrawal
Cc: sigtran at ietf.org
Subject: Re: [Sigtran] Abort chunk bundled with data chunk

Hi Salil,

When you are bundling anything (control chunk) with DATA chunk it
should be placed before DATA chunks in the SCTP packets.
Now if you bundle the ABORT chunk with DATA chunk in a single SCTP
packet the ABORT chunk will be processed before DATA chunk and
association will be broken down.
So, that DATA chunk will have no significance as it's association is
now broken by the ABORT chunk placed before it.

--Ashwani Kathuria

On Thu, Oct 15, 2009 at 12:37 PM, Salil Agrawal <Salil.Agrawal at ccpu.com>
wrote:
> Hi,
>
> We have a confusion while understanding the SCTP RFC4960 section 9.1
it
> says "DATA chunks MUST NOT be bundled with ABORT" so sender must not
> bundle the data with abort.
>
> But the second paragraph states that "An endpoint MUST NOT respond to
> any received packet that contains an ABORT chunk". Which means if any
> packet is received at the receiver end where ABORT is bundled with the
> DATA it should not send any response. Does it mean that for the DATA
> chunk SACK should not be generated? Please clarify.
>
> Thanks,
> Salil Agrawal
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