Re: [tcpm] I-D Action: draft-ietf-tcpm-experimental-options-01.txt

On Wed, May 30, 2012 at 3:45 PM, Joe Touch <touch@isi.edu> wrote:
> Hi, all,
>
> This version incorporates feedback from the list. In specific:
>
> - minimum magic number length is not specified
>
> There are minor reorganization and revisions as well.
>
> Joe
Two questions:

1) how to share the magic value with other developers (for other OSes)?

Since I don't know, I am doing this on the list:
We implemented this draft in the Fast Open for Linux. The magic is 0xF989
by this simple formula (suggested by Eric Dumazet):
time_t now = time(NULL);
printf("0x%04x\n", 0xFFFF & (now ^ (now >> 16)));

   Maybe a simple text file under ietf.org work?

2) While the draft does not address the transition plan, we developers have
   to. TFO plan is that once IANA grants the precious number, Linux will
   support both values for a while, until most clients use the new value.
   It's hassle but well ... but other TCP features may have different plans.

   Should this kind of transition plan be part of any new TCP draft that
   needs new option?

Thanks.

>
>
> On 5/30/2012 3:40 PM, internet-drafts@ietf.org wrote:
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories. This draft is a work item of the TCP Maintenance and Minor
>> Extensions Working Group of the IETF.
>>
>>         Title           : Shared Use of Experimental TCP Options
>>         Author(s)       : Joe Touch
>>         Filename        : draft-ietf-tcpm-experimental-options-01.txt
>>         Pages           : 8
>>         Date            : 2012-05-30
>>
>>     This document describes how TCP option codepoints can support
>>     concurrent experiments using a magic number field. This mechanism
>>     avoids the need for a coordinated registry, and is backward-
>>     compatible with currently known uses.
>>
>>
>> A URL for this Internet-Draft is:
>>
>> http://www.ietf.org/internet-drafts/draft-ietf-tcpm-experimental-options-01.txt
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> This Internet-Draft can be retrieved at:
>>
>> ftp://ftp.ietf.org/internet-drafts/draft-ietf-tcpm-experimental-options-01.txt
>>
>> The IETF datatracker page for this Internet-Draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-tcpm-experimental-options/
>>
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>
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