[ippm] [Technical Errata Reported] RFC6038 (6410)

RFC Errata System <rfc-editor@rfc-editor.org> Mon, 25 January 2021 08:17 UTC

To: acmorton@att.com, lencia@att.com, martin.h.duke@gmail.com, magnus.westerlund@ericsson.com, ianswett@google.com, tpauly@apple.com
From: RFC Errata System <rfc-editor@rfc-editor.org>
Cc: nmalykh@ieee.org, ippm@ietf.org, rfc-editor@rfc-editor.org
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Message-Id: <20210125081702.D2A05F4074C@rfc-editor.org>
Date: Mon, 25 Jan 2021 00:17:02 -0800
Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/otMsPFK7O5V7HocSMTLJLRGNXW8>
Subject: [ippm] [Technical Errata Reported] RFC6038 (6410)
Precedence: list

The following errata report has been submitted for RFC6038,
"Two-Way Active Measurement Protocol (TWAMP) Reflect Octets and Symmetrical Size Features".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid6410

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Type: Technical
Reported by: Nikolai Malykh <nmalykh@ieee.org>

Section: 5.2.1

Original Text
-------------
Section 4.2.1 of [RFC5357] recommends a padding truncation process
for use in TWAMP. When using that process in conjunction with the
Reflect Octets mode, the Session-Reflector MUST reflect the
designated octets from the Session-Sender's test packet in the Packet
Padding (from Session-Sender) field, and MAY re-use additional Packet
Padding from the Session-Sender. The Session-Reflector MUST truncate
the padding such that the highest number octets are discarded, and
the test packet length equals the Session-Sender's packet length.
When using the recommended truncation process, the Session-Reflector
MUST truncate exactly 27 octets of padding in Unauthenticated mode,
and exactly 56 octets in Authenticated and Encrypted modes.

Corrected Text
--------------
Section 4.2.1 of [RFC5357] recommends a padding truncation process
for use in TWAMP. When using that process in conjunction with the
Reflect Octets mode, the Session-Reflector MUST reflect the
designated octets from the Session-Sender's test packet in the Packet
Padding (from Session-Sender) field, and MAY re-use additional Packet
Padding from the Session-Sender. The Session-Reflector MUST truncate
the padding such that the highest number octets are discarded, and
the test packet length equals the Session-Sender's packet length.
When using the recommended truncation process, the Session-Reflector
MUST truncate exactly 27 octets of padding in Unauthenticated mode,
and exactly 64 octets in Authenticated and Encrypted modes.

Notes
-----
Invalid required padding size (56 instead of 64) for modes with authentication and encryption.

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RFC6038 (draft-ietf-ippm-twamp-reflect-octets-09)
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Title : Two-Way Active Measurement Protocol (TWAMP) Reflect Octets and Symmetrical Size Features
Publication Date : October 2010
Author(s) : A. Morton, L. Ciavattone
Category : PROPOSED STANDARD
Source : IP Performance Measurement
Area : Transport
Stream : IETF
Verifying Party : IESG

[ippm] [Technical Errata Reported] RFC6038 (6410) RFC Errata System