Re: [tcpm] Fwd: I-D Action: draft-nishida-tcpm-agg-syn-ext-00.txt

Hi Kangjiao,

OK. I think it has some similarities. I will think about this further and
will get back to you.
--
Yoshi

On Tue, Feb 9, 2021 at 5:14 PM Kangjiao <kangjiao@huawei.com> wrote:

> Hi Yoshi,
>
>
>
> I wrote a draft to propose an idea for MPTCP subtype capability exchange
> during MPTCP handshake.  We think, in MPTCP, some options are mandatory but
> some options can be set as optional ones. So an exchange mechanism of
> actual capability between both parties are needed.
>
>
>
> URL:
> https://www.ietf.org/archive/id/draft-kang-tcpm-subtype-capability-exchange-00.txt
>
> Status:
> https://datatracker.ietf.org/doc/draft-kang-tcpm-subtype-capability-exchange/
>
> Html:
> https://www.ietf.org/archive/id/draft-kang-tcpm-subtype-capability-exchange-00.html
>
> Htmlized:
> https://tools.ietf.org/html/draft-kang-tcpm-subtype-capability-exchange-00
>
>
>
> When I read your draft, I think maybe our above work have some relevance
> to your suggestions. If you think it'll help with this work, I hope we can
> discuss this new negotiation mechanism for related options and subtypes.
> Thanks
>
>
>
> Best wishes,
>
> Jiao
>
>
>
> *From:* tcpm [mailto:tcpm-bounces@ietf.org] *On Behalf Of *Yoshifumi
> Nishida
> *Sent:* Wednesday, February 3, 2021 3:12 PM
> *To:* tcpm@ietf.org Extensions <tcpm@ietf.org>
> *Subject:* [tcpm] Fwd: I-D Action: draft-nishida-tcpm-agg-syn-ext-00.txt
>
>
>
> Hi folks,
>
>
>
> I prepared a draft for SYN option space extensions.
>
> I know this is a difficult issue in TCP and has been discussed for a long
> time.
>
> But, I'm thinking that it might be a good time to discuss it again.
>
>
>
> Key ideas of the draft are the followings.
>
> 1: drastic changes in TCP's spec will not be required
>
>     (it does not require updating TCP header format nor using multiple SYN
> packets or additional SYN-like packets)
>
> 2: utilize the option negotiation schemes in mptcp for generic purposes.
> so, I think it can be considered middlebox friendly.
>
> 3: it has some limitations (e.g it can only extend around 30-40 bytes for
> SYN option space). But, if it's combined with EDO, we can use more option
> space.
>
>     (depends on how EDO draft will progress, though)
>
>
>
> Please let me know if you have any questions or comments or suggestions.
>
>
>
> Thank you so much!
>
> --
>
> Yoshi
>
>
>
>
>
> ---------- Forwarded message ---------
> From: <internet-drafts@ietf.org>
> Date: Tue, Feb 2, 2021 at 10:45 PM
> Subject: I-D Action: draft-nishida-tcpm-agg-syn-ext-00.txt
> To: <i-d-announce@ietf.org>
>
>
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>
>
>         Title           : Aggregated Option for SYN Option Space Extension
>         Author          : Yoshifumi Nishida
>         Filename        : draft-nishida-tcpm-agg-syn-ext-00.txt
>         Pages           : 14
>         Date            : 2021-02-02
>
> Abstract:
>    TCP option space is scarce resource as its max length is limited to
>    40 bytes.  This limitation becomes more significant in SYN segments
>    as all options used in a connection should be exchanged during SYN
>    negotiations.  This document proposes a new SYN option negotiation
>    scheme that provide a feature to compress TCP options in SYN segments
>    and provide more option space.  The proposed scheme does not update
>    the format of TCP header nor transmit any additional SYN or SYN-like
>    segments so that it has lower risks for middlebox interventions.  In
>    addition, by combining another proposal for option space extension,
>    it is possible to provide further option space.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-nishida-tcpm-agg-syn-ext/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-nishida-tcpm-agg-syn-ext-00
> https://datatracker.ietf.org/doc/html/draft-nishida-tcpm-agg-syn-ext-00
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
>
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