Network Working Group C. Bormann
Internet-Draft Universitaet Bremen TZI
Intended status: Informational January 28, 2018
Expires: August 1, 2018
impl-info: A link relation type for disclosing implementation
information
draft-bormann-t2trg-rel-impl-00
Abstract
When debugging an interoperability problem, it is often helpful to
have information about the implementation version of a peer. To
enable the disclosure of such information, HTTP defines header fields
such as Server and User-Agent.
In CoAP, it is rarely appropriate to send information of this kind in
every request or response. Instead, the present specification
defines a link relation type, impl-info, that can be used to convey
this information via the self-description capabilities of the /.well-
known/core resource and the CoRE resource directory.
Status of This Memo
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This Internet-Draft will expire on August 1, 2018.
Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. IANA Consideration . . . . . . . . . . . . . . . . . . . . . 2
3. Security considerations . . . . . . . . . . . . . . . . . . . 2
4. References . . . . . . . . . . . . . . . . . . . . . . . . . 3
4.1. Normative References . . . . . . . . . . . . . . . . . . 3
4.2. Informative References . . . . . . . . . . . . . . . . . 3
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 3
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 3
1. Introduction
(TO DO: Insert an extended form of the abstract first here, expanding
the references to [RFC7231], [RFC7252], [RFC6690], and
[I-D.ietf-core-resource-directory] in the process.)
2. IANA Consideration
This specification requests the registration of the link relation
type "impl-info".
The registration template as per [RFC8288] follows.
o _Relation Name_: impl-info
o _Description_: Refers to implementation information that may be
helpful in diagnosing technical problems with the implementation
of the context, such as lists of components and their
implementation versions.
o _Reference_: [THIS]
3. Security considerations
The security considerations listed in Section 9.6 of [RFC7231] and
the sections referenced there apply.
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4. References
4.1. Normative References
[RFC8288] Nottingham, M., "Web Linking", RFC 8288,
DOI 10.17487/RFC8288, October 2017,
<https://www.rfc-editor.org/info/rfc8288>.
[THIS] Bormann, C., "impl-info: A link relation type for
disclosing implementation information", draft-bormann-
t2trg-rel-impl-00 (work in progress), January 2018.
4.2. Informative References
[I-D.ietf-core-resource-directory]
Shelby, Z., Koster, M., Bormann, C., Stok, P., and C.
Amsuess, "CoRE Resource Directory", draft-ietf-core-
resource-directory-12 (work in progress), October 2017.
[RFC6690] Shelby, Z., "Constrained RESTful Environments (CoRE) Link
Format", RFC 6690, DOI 10.17487/RFC6690, August 2012,
<https://www.rfc-editor.org/info/rfc6690>.
[RFC7231] Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer
Protocol (HTTP/1.1): Semantics and Content", RFC 7231,
DOI 10.17487/RFC7231, June 2014,
<https://www.rfc-editor.org/info/rfc7231>.
[RFC7252] Shelby, Z., Hartke, K., and C. Bormann, "The Constrained
Application Protocol (CoAP)", RFC 7252,
DOI 10.17487/RFC7252, June 2014,
<https://www.rfc-editor.org/info/rfc7252>.
Acknowledgements
The need for implementation information in the CoRE resource
directory has been identified by Peter van der Stok. Discussions
with Peter and with Christian Amsuess led to the present proposal of
employing self-description for this purpose.
Author's Address
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Carsten Bormann
Universitaet Bremen TZI
Postfach 330440
Bremen D-28359
Germany
Phone: +49-421-218-63921
Email: cabo@tzi.org
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