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RFC 6255

Delay-Tolerant Networking Bundle Protocol IANA Registries

Pages: 9
Informational

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Internet Research Task Force (IRTF)                          M. Blanchet
Request for Comments: 6255                                      Viagenie
Category: Informational                                         May 2011
ISSN: 2070-1721


       Delay-Tolerant Networking Bundle Protocol IANA Registries

Abstract

The Delay-Tolerant Networking (DTN) Research Group research group has defined many protocols such as the Bundle Protocol and Licklider Transmission Protocol. The specifications of these protocols contain fields that are subject to a registry. For the purpose of its research work, the group 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 executed by IANA. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Research Task Force (IRTF). The IRTF publishes the results of Internet-related research and development activities. These results might not be suitable for deployment. This RFC represents the consensus of the Delay-Tolerant Network Research Group of the Internet Research Task Force (IRTF). Documents approved for publication by the IRSG are not a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6255. Copyright Notice Copyright (c) 2011 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.
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Table of Contents

1. Introduction ....................................................2 2. Treatment of Flag Fields Encoded Using SDNVs ....................2 3. Bundle Protocol .................................................3 3.1. Bundle Block Types .........................................3 3.2. Primary Bundle Protocol Version ............................3 3.3. Bundle Processing Control Flags ............................4 3.4. Block Processing Control Flags .............................5 3.5. Bundle Status Report Flags .................................6 3.6. Bundle Status Report Reason Codes ..........................7 3.7. Bundle Custody Signal Reason Codes .........................7 4. Security Considerations .........................................8 5. IANA Considerations .............................................8 6. Acknowledgements ................................................8 7. References ......................................................9 7.1. Normative References .......................................9 7.2. Informative References .....................................9

1. Introduction

The DTNRG research group has defined many protocols relevant to the DTN architecture [RFC4838] such as the Bundle Protocol [RFC5050] and Licklider Transmission Protocol [RFC5326]. The specifications of these protocols contain fields that are subject to a registry. For the purpose of its research work, the group created ad hoc registries (http://www.dtnrg.org/wiki/AssignedNamesAndNumbers). 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 executed by IANA.

2. Treatment of Flag Fields Encoded Using SDNVs

The DTN protocols use several extensible bit flag fields that are encoded as Self-Delimiting Numeric Values (SDNVs) as defined in Section 4.1 of [RFC5050]. For these fields, the registry specifies the allocation and usage of bit positions within the unencoded field. The SDNV encoding treats the ensemble of bits in the unencoded value as a numeric value to be encoded on transmission and decoded on reception as described in [RFC5050]. Processing of SDNV-encoded flags is discussed in [RFC6256]. Section 4.1 of [RFC5050] specifies that implementations are not required to handle SDNVs with more than 64 bits in their unencoded value. Accordingly, SDNV-encoded flag fields should be limited to 64 bit positions.
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   IANA registry policies and wording used in this document are
   described in [RFC5226].

3. Bundle Protocol

The Bundle Protocol (BP) [RFC5050] has fields requiring a registry managed by IANA.

3.1. Bundle Block Types

The Bundle Protocol has a Bundle Block Type code field (Section 4.5.2) [RFC5050]. An IANA registry has been set up as follows. The registration policy for this registry is: 0-191: Specification Required 192-255: Private or experimental use. No assignment by IANA. The Value range is: unsigned 8-bit integer. Bundle Block Type Registry +--------------+---------------------------------+---------------+ | Value | Description | Reference | +--------------+---------------------------------+---------------+ | 0 | Reserved | This document | | 1 | Bundle Payload Block | [RFC5050] | | 2-191 | Unassigned | | | 192-255 | Private and/or Experimental Use | [RFC5050] | +--------------+---------------------------------+---------------+ The value "0" was not defined in any document or in the ad hoc registry. As per consensus by the DTNRG research group, it is reserved per this document.

3.2. Primary Bundle Protocol Version

The Bundle Protocol has a version field (see Section 4.5.1 of [RFC5050]). An IANA registry has been set up as follows. The registration policy for this registry is: RFC Required The Value range is: unsigned 8-bit integer.
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                 Primary Bundle Protocol Version Registry

                  +-------+-------------+---------------+
                  | Value | Description | Reference     |
                  +-------+-------------+---------------+
                  |   0-5 | Reserved    | This document |
                  |     6 | Assigned    | [RFC5050]     |
                  | 7-255 | Unassigned  |               |
                  +-------+-------------+---------------+

   The value "0-5" was not defined in any document or in the ad hoc
   registry.  As per consensus by the DTNRG research group, it is
   reserved per this document.

3.3. Bundle Processing Control Flags

The Bundle Protocol has a Bundle Processing Control Flags field (see Section 4.2 of [RFC5050]) encoded as an SDNV (see Section 2). An IANA registry has been set up as follows. The registration policy for this registry is: Specification Required The Value range is: Variable length. Maximum number of flag bit positions: 64
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                 Bundle Processing Control Flags Registry

   +--------------------+----------------------------------+-----------+
   |       Bit Position | Description                      | Reference |
   |    (right to left) |                                  |           |
   +--------------------+----------------------------------+-----------+
   |                  0 | Bundle is a fragment             | [RFC5050] |
   |                  1 | Application data unit is an      | [RFC5050] |
   |                    | administrative record            |           |
   |                  2 | Bundle must not be fragmented    | [RFC5050] |
   |                  3 | Custody transfer is requested    | [RFC5050] |
   |                  4 | Destination endpoint is a        | [RFC5050] |
   |                    | singleton                        |           |
   |                  5 | Acknowledgement by application   | [RFC5050] |
   |                    | is requested                     |           |
   |                  6 | Reserved                         | [RFC5050] |
   |                7-8 | Class of service: priority       | [RFC5050] |
   |               9-13 | Class of service: reserved       | [RFC5050] |
   |                 14 | Request reporting of bundle      | [RFC5050] |
   |                    | reception                        |           |
   |                 15 | Request reporting of custody     | [RFC5050] |
   |                    | acceptance                       |           |
   |                 16 | Request reporting of bundle      | [RFC5050] |
   |                    | forwarding                       |           |
   |                 17 | Request reporting of bundle      | [RFC5050] |
   |                    | delivery                         |           |
   |                 18 | Request reporting of bundle      | [RFC5050] |
   |                    | deletion                         |           |
   |                 19 | Reserved                         | [RFC5050] |
   |                 20 | Reserved                         | [RFC5050] |
   |              21-63 | Unassigned                       |           |
   +--------------------+----------------------------------+-----------+

3.4. Block Processing Control Flags

The Bundle Protocol has a Block Processing Control Flags field (see Section 4.3 of [RFC5050]). An IANA registry has been set up as follows. The registration policy for this registry is: Specification Required The Value range is: Variable length. Maximum number of flag bit positions: 64
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                  Block Processing Control Flags Registry

   +--------------------+----------------------------------+-----------+
   |       Bit Position | Description                      | Reference |
   |    (right to left) |                                  |           |
   +--------------------+----------------------------------+-----------+
   |                  0 | Block must be replicated in      | [RFC5050] |
   |                    | every fragment                   |           |
   |                  1 | Transmit status report if block  | [RFC5050] |
   |                    | can't be processed               |           |
   |                  2 | Delete bundle if block can't be  | [RFC5050] |
   |                    | processed                        |           |
   |                  3 | Last block                       | [RFC5050] |
   |                  4 | Discard block if it can't be     | [RFC5050] |
   |                    | processed                        |           |
   |                  5 | Block was forwarded without      | [RFC5050] |
   |                    | being processed                  |           |
   |                  6 | Block contains an EID-reference  | [RFC5050] |
   |                    | field                            |           |
   |               7-63 | Unassigned                       |           |
   +--------------------+----------------------------------+-----------+

3.5. Bundle Status Report Flags

The Bundle Protocol has a Status Report Status Flag field (see Section 6.1.1 of [RFC5050]). An IANA registry has been set up as follows. The registration policy for this registry is: RFC Required The Value range is: 8 bits. Bundle Status Report Flags Registry +----------+----------------------------------------+---------------+ | Value | Description | Reference | +----------+----------------------------------------+---------------+ | 00000000 | Reserved | This document | | 00000001 | Reporting node received bundle | [RFC5050] | | 00000010 | Reporting node accepted custody of | [RFC5050] | | | bundle | | | 00000100 | Reporting node forwarded the bundle | [RFC5050] | | 00001000 | Reporting node delivered the bundle | [RFC5050] | | 00010000 | Reporting node deleted the bundle | [RFC5050] | | 00100000 | Unassigned | | | 01000000 | Unassigned | | | 10000000 | Unassigned | | +----------+----------------------------------------+---------------+
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   The value "00000000" was not defined in any document or in the ad hoc
   registry.  As per consensus by the DTNRG research group, it is
   reserved per this document.

3.6. Bundle Status Report Reason Codes

The Bundle Protocol has a Bundle Status Report Reason Codes field (see Section 6.1.1 of [RFC5050]). An IANA registry has been set up as follows. The registration policy for this registry is: Specification Required The Value range is: unsigned 8-bit integer. Bundle Status Report Reason Codes Registry +-------+-------------------------------------------+---------------+ | Value | Description | Reference | +-------+-------------------------------------------+---------------+ | 0 | No additional information | [RFC5050] | | 1 | Lifetime expired | [RFC5050] | | 2 | Forwarded over unidirectional link | [RFC5050] | | 3 | Transmission canceled | [RFC5050] | | 4 | Depleted storage | [RFC5050] | | 5 | Destination endpoint ID unintelligible | [RFC5050] | | 6 | No known route to destination from here | [RFC5050] | | 7 | No timely contact with next node on route | [RFC5050] | | 8 | Block unintelligible | [RFC5050] | | 9-254 | Unassigned | | | 255 | Reserved | This document | +-------+-------------------------------------------+---------------+ The value "255" was not defined in any document or in the ad hoc registry. As per consensus by the DTNRG research group, it is reserved per this document.

3.7. Bundle Custody Signal Reason Codes

The Bundle Protocol has a Bundle Custody Signal Reason Codes field (see Section 6.1.2 of [RFC5050]). An IANA registry has been set up as follows. The registration policy for this registry is: Specification Required The Value range is: unsigned 7-bit integer.
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                Bundle Custody Signal Reason Codes Registry

   +--------------+--------------------------------------+-------------+
   |        Value | Description                          | Reference   |
   +--------------+--------------------------------------+-------------+
   |            0 | No additional information            | [RFC5050]   |
   |          1-2 | Unassigned                           |             |
   |            3 | Redundant reception (reception by a  | [RFC5050]   |
   |              | node that is a custodial node for    |             |
   |              | this bundle)                         |             |
   |            4 | Depleted storage                     | [RFC5050]   |
   |            5 | Destination endpoint ID              | [RFC5050]   |
   |              | unintelligible                       |             |
   |            6 | No known route to destination from   | [RFC5050]   |
   |              | here                                 |             |
   |            7 | No timely contact with next node on  | [RFC5050]   |
   |              | route                                |             |
   |            8 | Block unintelligible                 | [RFC5050]   |
   |        9-126 | Unassigned                           |             |
   |          127 | Reserved                             | This        |
   |              |                                      | document    |
   +--------------+--------------------------------------+-------------+

   The value "127" was not defined in any document or in the ad hoc
   registry.  As per consensus by the DTNRG research group, it is
   reserved per this document.

4. Security Considerations

This document requests the creation of registries managed by IANA. There are no security issues involved. Refer to the Security Considerations section of the referenced protocols.

5. IANA Considerations

IANA has created the registries as described in the previous sections.

6. Acknowledgements

The editor would like to thank the following people who have provided comments and suggestions to this document, in no specific order: Stephen Farrell, Daniel Ellard, Scott Burleigh, Keith Scott, and Elwyn Davies.
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7. References

7.1. Normative References

[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.

7.2. Informative References

[RFC4838] Cerf, V., Burleigh, S., Hooke, A., Torgerson, L., Durst, R., Scott, K., Fall, K., and H. Weiss, "Delay-Tolerant Networking Architecture", RFC 4838, April 2007. [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.

Author's Address

Marc Blanchet Viagenie 2875 boul. Laurier, suite D2-630 Quebec, QC G1V 2M2 Canada EMail: Marc.Blanchet@viagenie.ca URI: http://viagenie.ca