[tsvwg] [Errata Verified] RFC9260 (7387)

RFC Errata System <rfc-editor@rfc-editor.org> Thu, 27 April 2023 21:14 UTC

To: tuexen@fh-muenster.de, randall@lakerest.net, tuexen@fh-muenster.de, kee@kamstrup.com
From: RFC Errata System <rfc-editor@rfc-editor.org>
Cc: martin.h.duke@gmail.com, iesg@ietf.org, tsvwg@ietf.org, iana@iana.org, rfc-editor@rfc-editor.org
Content-Type: text/plain; charset="UTF-8"
Message-Id: <20230427211418.6D8AC563E5@rfcpa.amsl.com>
Date: Thu, 27 Apr 2023 14:14:18 -0700
Archived-At: <https://mailarchive.ietf.org/arch/msg/tsvwg/coKiadVNkVwc_SErArybkkGGHos>
Subject: [tsvwg] [Errata Verified] RFC9260 (7387)
Precedence: list

The following errata report has been verified for RFC9260,
"Stream Control Transmission Protocol". 

--------------------------------------
You may review the report below and at:
https://www.rfc-editor.org/errata/eid7387

--------------------------------------
Status: Verified
Type: Technical

Reported by: Michael Tüxen <tuexen@fh-muenster.de>
Date Reported: 2023-03-16
Verified by: Martin Duke (IESG)

Section: 5.2.4.1

Original Text
-------------
   Endpoint A                                          Endpoint Z
   <-------------- Association is established---------------------->
   Tag=Tag_A                                             Tag=Tag_Z
   <--------------------------------------------------------------->
   {A crashes and restarts}
   {app sets up an association with Z}
   (build TCB)
   INIT [I-Tag=Tag_A'
         & other info]  --------\
   (Start T1-init timer)         \
   (Enter COOKIE-WAIT state)      \---> (find an existing TCB,
                                         populate TieTags if needed,
                                         compose Cookie_Z with Tie-Tags
                                         and other info)
                                   /--- INIT ACK [Veri Tag=Tag_A',
                                  /               I-Tag=Tag_Z',
   (Cancel T1-init timer) <------/                Cookie_Z]
                                        (leave original TCB in place)
   COOKIE ECHO [Veri=Tag_Z',
                Cookie_Z]-------\
   (Start T1-init timer)         \
   (Enter COOKIE-ECHOED state)    \---> (Find existing association,
                                         Tie-Tags in Cookie_Z match
                                         Tie-Tags in TCB,
                                         Tags do not match, i.e.,
                                         case X X M M above,
                                         Announce Restart to ULP
                                         and reset association).
                                  /---- COOKIE ACK
   (Cancel T1-init timer, <------/
    Enter ESTABLISHED state)
   {app sends 1st user data; strm 0}
   DATA [TSN=Initial TSN_A
       Strm=0,Seq=0 & user data]--\
   (Start T3-rtx timer)            \
                                    \->
                                 /--- SACK [TSN Ack=init TSN_A,Block=0]
   (Cancel T3-rtx timer) <------/


Corrected Text
--------------
   Endpoint A                                          Endpoint Z
   <-------------- Association is established---------------------->
   Tag=Tag_A                                             Tag=Tag_Z
   <--------------------------------------------------------------->
   {A crashes and restarts}
   {app sets up an association with Z}
   (build TCB)
   INIT [I-Tag=Tag_A'
         & other info]  --------\
   (Start T1-init timer)         \
   (Enter COOKIE-WAIT state)      \---> (find an existing TCB,
                                         populate TieTags if needed,
                                         compose Cookie_Z with Tie-Tags
                                         and other info)
                                   /--- INIT ACK [Veri Tag=Tag_A',
                                  /               I-Tag=Tag_Z',
   (Cancel T1-init timer) <------/                Cookie_Z]
                                        (leave original TCB in place)
   COOKIE ECHO [Veri=Tag_Z',
                Cookie_Z]-------\
   (Start T1-cookie timer)       \
   (Enter COOKIE-ECHOED state)    \---> (Find existing association,
                                         Tie-Tags in Cookie_Z match
                                         Tie-Tags in TCB,
                                         Tags do not match, i.e.,
                                         case X X M M above,
                                         Announce Restart to ULP
                                         and reset association).
                                  /---- COOKIE ACK
   (Cancel T1-cookie timer, <----/
    Enter ESTABLISHED state)
   {app sends 1st user data; strm 0}
   DATA [TSN=Initial TSN_A
       Strm=0,Seq=0 & user data]--\
   (Start T3-rtx timer)            \
                                    \->
                                 /--- SACK [TSN Ack=init TSN_A,Block=0]
   (Cancel T3-rtx timer) <------/


Notes
-----
A packet containing an COOKIE-ECHO chunk is protected against loss by the T1-cookie timer, not the T1-init timer.

--------------------------------------
RFC9260 (draft-ietf-tsvwg-rfc4960-bis-19)
--------------------------------------
Title               : Stream Control Transmission Protocol
Publication Date    : June 2022
Author(s)           : R. Stewart, M. Tüxen, K. Nielsen
Category            : PROPOSED STANDARD
Source              : Transport Area Working Group
Area                : Transport
Stream              : IETF
Verifying Party     : IESG

[tsvwg] [Errata Verified] RFC9260 (7387) RFC Errata System