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 25, 2012.

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 carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must 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
• 2. Licklider Transmission Protocol
• 2.1. LTP Cancel Segment Reason Codes
• 2.2. LTP Engine ID
• 2.3. LTP Client Service ID
• 3. Compressed Bundle Header Encoding
• 3.1. CBHE Node Numbers
• 3.2. CBHE Service Numbers
• 4. Bundle Administrative Record Types
• 5. Security Considerations
• 6. IANA Considerations
• 7. Acknowledgements
• 8. References
• 8.1. Normative References
• 8.2. Informative References
• Authors' Addresses

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:

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 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:

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 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:

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       |
    +--------------------+----------------------------+---------------+

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

8.2. Informative References

Authors' Addresses