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Delay Tolerant Networking WG                                    K. Scott
Internet-Draft                                     The MITRE Corporation
Intended status: Informational                                S. Farrell
Expires: August 27, 2012                    Computer Science Department,
                                                       Trinity Collegeex
                                                       February 24, 2012


Licklider Transmission Protocol (LTP), Compressed Bundle Header Encoding
              (CBHE), and Bundle Protocol IANA Registries
                   draft-dtnrg-ltp-cbhe-registries-02

Abstract

   The DTNRG research group has defined the experimental Licklider
   Transmission Protocol (LTP) [RFC5326] and the Compressed Bundle
   Header Encoding (CBHE) [RFC6260] mechanism for the 'ipn' URI scheme.
   Finally, RFC5050 [RFC5050] defines values for the Bundle
   Administrative Record Type.  All of these describe fields that are
   subject to a registry.  For the purpose of its research work, the
   group has created ad-hoc registries.  As the specifications are
   stable and have multiple interoperable implementations, the group
   would like to hand off the registries to IANA for official custody.
   This document describes the actions needed to be executed by IANA.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 27, 2012.




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Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.


Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Licklider Transmission Protocol  . . . . . . . . . . . . . . .  3
     2.1.  LTP Cancel Segment Reason Codes  . . . . . . . . . . . . .  3
     2.2.  LTP Engine ID  . . . . . . . . . . . . . . . . . . . . . .  4
     2.3.  LTP Client Service ID  . . . . . . . . . . . . . . . . . .  5
   3.  Compressed Bundle Header Encoding  . . . . . . . . . . . . . .  6
     3.1.  CBHE Node Numbers  . . . . . . . . . . . . . . . . . . . .  6
     3.2.  CBHE Service Numbers . . . . . . . . . . . . . . . . . . .  7
   4.  Bundle Administrative Record Types . . . . . . . . . . . . . .  8
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  9
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  9
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     8.1.  Normative References . . . . . . . . . . . . . . . . . . .  9
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 10
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 10

















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1.  Introduction

   The DTNRG research group has defined the Licklider Transmission
   Protocol (LTP)[RFC5326].  LTP contains certain fields that are
   subject to a registry.  For the purpose of its research work, the
   group has created ad-hoc registries.  As the specifications are
   stable and have multiple interoperable implementations, the group
   would like to hand off the registries to IANA for official custody.
   This document describes the actions needed to be executed by IANA
   [RFC5226].

   The Compressed Bundle Header Encoding (CBHE) [RFC6260] specification
   defines the concepts of Node Number and Service Number in the 'ipn'
   URI scheme.  In this document we request formation of an IANA
   registry for the Node Number field in the 'ipn' scheme.  There is a
   separate Internet Draft that will (if approved) establish a registry
   for the service-nbr portion and relate entries there to a
   corresponding registry for the 'dtn' URI scheme.

   Because of its association with space communication and the
   Consultative Committee on Space Data Systems [CCSDS], a portion of
   the CBHE Node Number space and a portion of the LTP Engine ID space
   is delegated by this document to the CCSDS Space Assigned Numbers
   Authority [SANA].  SANA functions similarly to IANA in that it
   maintains registries of managed values, with a focus on values used
   by protocols used by CCSDS member agencies.


2.  Licklider Transmission Protocol

   The Licklider Transmission Protocol has fields requiring registries
   managed by IANA.  This document requests the creation of the three
   registries in this section and that they be associated with the other
   registries for the Licklider Transmission protocol.

2.1.  LTP Cancel Segment Reason Codes

   Section 3.2.4 of [RFC5326] defines the reason codes that may be
   present in Cancel Segments in the LTP protocol.

   The registration policy for this registry is:

   0x00--0x05  As defined by RFC5326 and shown in in Table 2-1 below.

   0x06 -- 0xFF  Allocatable by IANA; RFC Required

   The initial values for the LTP Cancel Segment Reason Codes registry
   shall be:



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   Table 2-1: Initial values for the LTP Cancel Segment Reason Codes
   Registry:
     +-----------+-------------------------------------+---------------+
     | Value     | Description                         | Reference     |
     +-----------+-------------------------------------+---------------+
     |     0     | Client service canceled session     | RFC5326       |
     |     1     | Unreachable client service          | RFC5326       |
     |     2     | Retransmission limit exceeded.      | RFC5326       |
     |     3     | Miscolored data received            | RFC5326       |
     |     4     | System error caused termination     | RFC5326       |
     |     5     | Retransmission limit exceeded.      | RFC5326       |
     | 0x06-0xFF | Allocatable by IANA.                | This document |
     +--------------------+----------------------------+---------------+

2.2.  LTP Engine ID

   The Licklider Transmission Protocol has an LTP Engine ID field
   (section 2 of [RFC5326]).  An IANA registry shall be set up as
   follows.

   The registration policy for this registry is:

   0  Reserved; no allocation by IANA

   1 -- (2**14)-1  Allocatable by IANA; expert review required.  The
      designated experts for the review are the chairs of the IRTF DTN
      Research Group (dtnrg) if the dtnrg is extant, or as determined by
      the IRSG.

   (2**14) -- (2**21)-1  Allocated to the Space Assigned Numbers
      Authority (SANA) for use by Consultative Committee for Space Data
      Systems (CCSDS) missions.

   (2**21) -- (2**27)-1  Private or experimental use.  No assignment by
      IANA.

   (2**27) -- (2**42)-1  Allocatable by IANA on a First-come, First-
      Served basis for requests for less than or equal to 2**14 values.
      Expert review for requests of more than 2**14 values.  The
      designated experts for the review are the chairs of the IRTF DTN
      Research Group (dtnrg) if the dtnrg is extant, or as determined by
      the IRSG.

   >= (2**42)  Reserved

   The LTP Engine ID is expressed as a Self-Delimiting Numeric Value
   (SDNV) in the LTP protocol and no maximum is specified in the
   protocol definition.  SDNVs were first described in relation to the



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   Bundle Protocol in Section 4.1 of [RFC5050] and are also described in
   the stand-alone document [RFC6256].  The initial values for the LTP
   Engine Numbers registry shall be:

   Table 2-2: Initial values for the LTP Engine Numbers Registry:
     +--------------------+----------------------------+---------------+
     |        Value       | Description                | Reference     |
     +--------------------+----------------------------+---------------+
     |                  0 | Reserved                   | This document |
     |       1--(2**14)-1 | Unassigned                 | This document |
     | (2**14)--(2**21)-1 | Administered by CCSDS SANA | This document |
     | (2**21)--(2**27)-1 | Private/Experimental Use   | This document |
     | (2**27)--(2**42)-1 | Allocatable by IANA        | This document |
     |          >=(2**42) | Reserved                   | This document |
     +--------------------+----------------------------+---------------+

2.3.  LTP Client Service ID

   The Licklider Transmission Protocol has a client service ID number
   field (section 3.2.1 of [RFC5326]).  An IANA registry shall be set up
   as follows.

   The registration policy for this registry is:

   0 -- 3  Initial registry values as shown in table 2-3 below.

   4 -- (2**14)-1  Administered by CCSDS SANA

   2**14 -- 32,767  Private or experimental use; no assignment by IANA.

   >= 32,768  Allocatable by IANA.  Expert review required.  The
      designated experts for the review are the chairs of the IRTF DTN
      Research Group (dtnrg) if the dtnrg is extant, or as determined by
      the IRSG.

   The LTP Client Service ID is expressed as a Self-Delimiting Numeric
   Value (SDNV) in the LTP protocol and no maximum value is specified in
   the protocol definition.  The initial values for the LTP Client
   Service Identifiers registry shall be:












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   Table 2-3: LTP Client Service Identifiers Registry:
    +----------------+---------------------------------+---------------+
    |        Value   | Description                     | Reference     |
    +----------------+---------------------------------+---------------+
    |             0  | Reserved                        | [RFC5326]     |
    |             1  | Bundle Protocol                 | This document |
    |             2  | LTP Service Data Aggregation    | This document |
    |             3  | CCSDS File Delivery Service     | This document |
    |  4--(2**14)-1  | Administered by CCSDS SANA      | This document |
    |(2**14)--32,767 | Private / Experimental Use      | This document |
    |       >=32,768 | Unassigned (assignable by IANA) | This document |
    +----------------+---------------------------------+---------------+


3.  Compressed Bundle Header Encoding

   The Compressed Bundle Header Encoding specification defines concepts
   of 'Node Number' and 'Service Number' that require registries managed
   by IANA.  This document addresses the 'Node Number' registry; a
   separate document addresses the formation and management of the
   'Service Number' registry.

3.1.  CBHE Node Numbers

   The Compressed Bundle Header Enoding specification defnes a Node
   Number (node-nbr) field (section 2.1 of [RFC6260]).  An IANA registry
   shall be set up as follows.

   The registration policy for this registry is:

   0  Reserved

   1 -- (2**14)-1  Expert review required.  The designated experts for
      the review are the chairs of the IRTF DTN Research Group (dtnrg)
      if the dtnrg is extant, or as determined by the IRSG.

   (2**14) -- (2**21)-1  Allocated to the Space Assigned Numbers
      Authority (SANA) for use by Consultative Committee for Space Data
      Systems (CCSDS) missions.

   (2**21) -- (2**27)-1  Private or experimental use.  No assignment by
      IANA.

   (2**27) -- (2**42)-1  Allocatable by IANA on a First-come, First-
      Served basis for requests for less than or equal to 2**14 values.
      Expert review for requests of more than 2**14 values.  The
      designated experts for the review are the chairs of the IRTF DTN
      Research Group (dtnrg) if the dtnrg is extant, or as determined by



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      the IRSG.

   >= (2**42)  Reserved

   The CBHE Node Number is expressed as a Self-Delimiting Numeric Value
   (SDNV) in the CBHE specification.  Allowable values for the Node
   Number range from 1 -- 2**64)-1.  The initial values for the CBHE
   Node Number registry shall be:

   Initial values for the CBHE Node Number Registry:
     +--------------------+----------------------------+---------------+
     |        Value       | Description                | Reference     |
     +--------------------+----------------------------+---------------+
     |                  0 | Reserved                   | This document |
     |       1--(2**14)-1 | Unassigned                 | This document |
     | (2**14)--(2**21)-1 | Managed by CCSDS SANA      | This document |
     | (2**21)--(2**27)-1 | Private/Experimental Use   | This document |
     | (2**27)--(2**42)-1 | Allocatable by IANA        | This document |
     |          >=(2**42) | Reserved                   | This document |
     +--------------------+----------------------------+---------------+

3.2.  CBHE Service Numbers

   The Compressed Bundle Header Enoding specification defnes a Service
   Number (service-nbr) field (section 2.1 of [RFC6260]).  An IANA
   registry shall be set up as follows.

   The registration policy for this registry is:

   0 -- 4  Initial values defined in table 3-1 below.

   5 -- 127  Administered by CCSDS SANA

   128 -- 2**16-1  Allocatable by IANA -- document required.

   >= 2**16  Private / Experimental Use

   The CBHE Service Number is expressed as a Self-Delimiting Numeric
   Value (SDNV) in the CBHE specification.  Allowable values for the
   Node Number range from 1 -- 2**64)-1.  The initial values for the
   CBHE Node Number registry shall be:










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   Table 3-1: Initial values for the CBHE Node Number Registry:
    +--------------------+----------------------------+----------------+
    |        Value       | Description                | Reference      |
    +--------------------+----------------------------+----------------+
    |                  0 | Bundle Protocol            | RFC6260        |
    |                    |   Administrative Record    |                |
    |                  1 | Echo Service               | This document  |
    |                  2 | Discard Service            | This document  |
    |                  3 | Console Service            | This document  |
    |                  4 | CCSDS File Delivery Service| [CFDP]         |
    |             5--127 | Administered by CCSDS SANA | This document  |
    |     128 -- 2**16-1 | Allocatable by IANA        | This document  |
    |            >=2**16 | Private/Experimental Use   | This document  |
    +--------------------+----------------------------+----------------+


4.  Bundle Administrative Record Types

   Section 6.1 of the Bundle Protocol specification[RFC5050] specifies a
   4-bit Administrative Record type code.  An IANA registry shall be set
   up as follows to manage these record types.  This document requests
   the addition of an additional registry titled 'Bundle Administrative
   Record Type' be added to the list of registries associated with the
   Bundle Protcol.

   The registration policy for this registry is:

   0  Reserved

   1--2  Defined by RFC5050 as shown in table 4-1 below.

   3-15  RFC required

   The initial values for the Bundle Administrative Record Type registry
   shall be:

   Table 4-1: Initial values for the Bundle Protocol Administrative
   Record Type Registry:
     +--------------------+----------------------------+---------------+
     |        Value       | Description                | Reference     |
     +--------------------+----------------------------+---------------+
     |                  0 | Reserved                   | This document |
     |                  1 | Bundle status report       | RFC5050       |
     |                  2 | Custody signal             | RFC5050       |
     |              3--15 | Allocatable by IANA        | RFC5050       |
     +--------------------+----------------------------+---------------+





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5.  Security Considerations

   This document requests the creation of registries managed by IANA.
   Thera are no security issues involved.  Refer to the Security
   Considerations section of [RFC5326] for security issues with the LTP
   protocol.


6.  IANA Considerations

   IANA is requested to create the registries as described in Sections 2
   and 3.


7.  Acknowledgements

   The editor would like to thank the following people, in no specific
   order: Marc Blanchet, Scott Burleigh.


8.  References

8.1.  Normative References

   [CFDP]     Consultative Committee for Space Data Systems
              (http://www.ccsds.org), "CCSDS File Delivery Protocol
              Version 4 (CCSDS 727.0-B-4)", January 2007.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC5050]  Scott, K. and S. Burleigh, "Bundle Protocol
              Specification", RFC 5050, November 2007.

   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", BCP 26, RFC 5226,
              May 2008.

   [RFC5326]  Ramadas, M., Burleigh, S., and S. Farrell, "Licklider
              Transmission Protocol - Specification", RFC 5326,
              September 2008.

   [RFC6256]  Eddy, W. and E. Davies, "Using Self-Delimiting Numeric
              Values in Protocols", RFC 6256, May 2011.

   [RFC6260]  Burleigh, S., "Compressed Bundle Header Encoding (CBHE)",
              RFC 6260, May 2011.




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8.2.  Informative References

   [CCSDS]    "The Consultative Committee for Space Data Systems,
              http://www.ccsds.org".

   [SANA]     "The CCSDS SANA Registry page at http://sanaregistry.org".


Authors' Addresses

   Keith Scott
   The MITRE Corporation
   7515 Colshire Drive
   McLean, VA, California  22102
   USA

   Phone: +1-703-983-6547
   Fax:   ++1-703-983-7142
   Email: kscott@mitre.org


   Stephen Farrell
   Computer Science Department, Trinity Collegeex
   Trinity College
   Dublin,
   Ireland

   Phone: +353-1-896-1761
   Fax:
   Email: stephen.farrell@cs.tcd.ie
   URI:




















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