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Re: [Sigtran] Abort chunk bundled with data chunk

To: Salil Agrawal <Salil.Agrawal at ccpu.com>
Subject: Re: [Sigtran] Abort chunk bundled with data chunk
From: Ashwani Kathuria <ashwani.grps at gmail.com>
Date: Thu, 15 Oct 2009 14:11:15 +0530
Cc: sigtran at ietf.org
Delivered-to: sigtran at core3.amsl.com
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References: <BDF44534797E3E46B55F3D12DE0C4BC40322075AD7 at GUREXMB01.ASIAN.AD.ARICENT.COM> <341a09720910090602t320e951ap38b853492c774920 at mail.gmail.com> <BDF44534797E3E46B55F3D12DE0C4BC40322075DA4 at GUREXMB01.ASIAN.AD.ARICENT.COM> <20091009193525.GA375 at openss7.org> <341a09720910112311s2ecb8da4qd93841cf201f20ae at mail.gmail.com> <BDF44534797E3E46B55F3D12DE0C4BC40322076004 at GUREXMB01.ASIAN.AD.ARICENT.COM> <22F058C3ED9D784E90CE473F2A9847F003CEC739 at in-exchange.ccpu.com> <341a09720910150027i3609b393qcdec16d23044c999 at mail.gmail.com> <22F058C3ED9D784E90CE473F2A9847F003CEC752 at in-exchange.ccpu.com>

Placing DATA chunk before control chunk (ABORT) makes it an Invalid SCTP packet.

--Ashwani Kathuria

On Thu, Oct 15, 2009 at 1:46 PM, Salil Agrawal <Salil.Agrawal at ccpu.com> wrote:
> 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
>> _______________________________________________
>> Sigtran mailing list
>> Sigtran at ietf.org
>> https://www.ietf.org/mailman/listinfo/sigtran
>>
>

Follow-Ups:
- Re: [Sigtran] Abort chunk bundled with data chunk
  - From: Salil Agrawal

References:
- [Sigtran] In IPSP-IPSP mode what should be the behavior on receving Notify(AS-PENDING) when AS is already AS-ACTIVE
  - From: Deepak Gunjal
- Re: [Sigtran] In IPSP-IPSP mode what should be the behavior on receving Notify(AS-PENDING) when AS is already AS-ACTIVE
  - From: Ashwani Kathuria
- Re: [Sigtran] In IPSP-IPSP mode what should be the behavior on receiving Notify(AS-PENDING) when AS is already AS-ACTIVE
  - From: Deepak Gunjal
- Re: [Sigtran] In IPSP-IPSP mode what should be the behavior on receiving Notify(AS-PENDING) when AS is already AS-ACTIVE
  - From: Brian F. G. Bidulock
- Re: [Sigtran] In IPSP-IPSP mode what should be the behavior on receiving Notify(AS-PENDING) when AS is already AS-ACTIVE
  - From: Ashwani Kathuria
- Re: [Sigtran] In IPSP-IPSP mode what should be the behavior on receiving Notify(AS-PENDING) when AS is already AS-ACTIVE
  - From: Deepak Gunjal
- [Sigtran] Abort chunk bundled with data chunk
  - From: Salil Agrawal
- Re: [Sigtran] Abort chunk bundled with data chunk
  - From: Ashwani Kathuria
- Re: [Sigtran] Abort chunk bundled with data chunk
  - From: Salil Agrawal

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