Delay-Tolerant Networking UDP Convergence Layer Protocol
draft-sipos-dtn-udpcl-00

Document Type Active Internet-Draft (individual)
Author Brian Sipos 
Last updated 2021-02-08 (latest revision 2021-02-07)
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Delay-Tolerant Networking                                       B. Sipos
Internet-Draft                                           RKF Engineering
Intended status: Standards Track                         7 February 2021
Expires: 11 August 2021

        Delay-Tolerant Networking UDP Convergence Layer Protocol
                        draft-sipos-dtn-udpcl-00

Abstract

   This document describes a UDP-based convergence layer (UDPCL) for
   Delay-Tolerant Networking (DTN).  This version of the UDPCL protocol
   clarifies requirements of RFC7122, adds discussion of multicast
   addressing, and updates to the Bundle Protocol (BP) contents,
   encodings, and convergence layer requirements in BP Version 7.
   Specifically, the UDPCL uses CBOR-encoded BPv7 bundles as its service
   data unit being transported and provides a reliable transport of such
   bundles.  This version of UDPCL also includes security and
   extensibility mechanisms.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on 11 August 2021.

Copyright Notice

   Copyright (c) 2021 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 (https://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

Sipos                    Expires 11 August 2021                 [Page 1]
Internet-Draft                  DTN UDPCL                  February 2021

   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Requirements Language . . . . . . . . . . . . . . . . . .   4
     1.3.  Definitions Specific to the UDPCL Protocol  . . . . . . .   5
   2.  General Protocol Description  . . . . . . . . . . . . . . . .   6
     2.1.  Convergence Layer Services  . . . . . . . . . . . . . . .   7
     2.2.  PKIX Environments and CA Policy . . . . . . . . . . . . .   8
     2.3.  Fragmentation Policies  . . . . . . . . . . . . . . . . .   8
     2.4.  Error Checking Policies . . . . . . . . . . . . . . . . .   9
     2.5.  Congestion Control Policies . . . . . . . . . . . . . . .   9
   3.  UDPCL Operation . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Destination Address . . . . . . . . . . . . . . . . . . .   9
     3.2.  UDP Header  . . . . . . . . . . . . . . . . . . . . . . .  10
     3.3.  UDPCL Messaging . . . . . . . . . . . . . . . . . . . . .  10
     3.4.  UDPCL Extension Items . . . . . . . . . . . . . . . . . .  12
       3.4.1.  DTLS Initiation (STARTTLS)  . . . . . . . . . . . . .  12
       3.4.2.  Bundle Transfer . . . . . . . . . . . . . . . . . . .  13
     3.5.  UDPCL Security  . . . . . . . . . . . . . . . . . . . . .  15
       3.5.1.  DTLS Handshake  . . . . . . . . . . . . . . . . . . .  15
       3.5.2.  DTLS Authentication . . . . . . . . . . . . . . . . .  15
   4.  Implementation Status . . . . . . . . . . . . . . . . . . . .  16
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  16
     5.1.  Threat: Passive Leak of Node Data . . . . . . . . . . . .  16
     5.2.  Threat: Passive Leak of Bundle Data . . . . . . . . . . .  17
     5.3.  Threat: Transport Security Stripping  . . . . . . . . . .  17
     5.4.  Threat: Weak DTLS Configurations  . . . . . . . . . . . .  17
     5.5.  Threat: Untrusted End-Entity Certificate  . . . . . . . .  18
     5.6.  Threat: Certificate Validation Vulnerabilities  . . . . .  18
     5.7.  Threat: BP Node Impersonation . . . . . . . . . . . . . .  18
     5.8.  Threat: Denial of Service . . . . . . . . . . . . . . . .  18
     5.9.  Mandatory-to-Implement DTLS . . . . . . . . . . . . . . .  19
     5.10. Alternate Uses of DTLS  . . . . . . . . . . . . . . . . .  19
       5.10.1.  DTLS Without Authentication  . . . . . . . . . . . .  19
       5.10.2.  Non-Certificate DTLS Use . . . . . . . . . . . . . .  20
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