Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
draft-ietf-dtn-tcpclv4-01

Document Type Active Internet-Draft (dtn WG)
Last updated 2017-01-06 (latest revision 2016-11-27)
Replaces draft-sipos-dtn-tcpclv4
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Stream WG state In WG Last Call Dec 2016
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Delay Tolerant Networking                                       B. Sipos
Internet-Draft                                           RKF Engineering
Obsoletes: RFC7242 (if approved)                               M. Demmer
Intended status: Standards Track                             UC Berkeley
Expires: May 31, 2017                                             J. Ott
                                                        Aalto University
                                                            S. Perreault
                                                       November 27, 2016

   Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
                       draft-ietf-dtn-tcpclv4-01

Abstract

   This document describes a revised protocol for the TCP-based
   convergence layer for Delay-Tolerant Networking (DTN).  The protocol
   revision is based on implementation issues in the original [RFC7242]
   and updates to the Bundle Protocol contents, encodings, and
   convergence layer requirements in [I-D.ietf-dtn-bpbis].

Status of This Memo

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   This Internet-Draft will expire on May 31, 2017.

Copyright Notice

   Copyright (c) 2016 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

Sipos, et al.             Expires May 31, 2017                  [Page 1]
Internet-Draft                 DTN TCPCLv4                 November 2016

   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Definitions Specific to the TCPCL Protocol  . . . . . . .   4
   3.  General Protocol Description  . . . . . . . . . . . . . . . .   5
     3.1.  Bidirectional Use of TCPCL Sessions . . . . . . . . . . .   6
     3.2.  Example Message Exchange  . . . . . . . . . . . . . . . .   6
   4.  Session Establishment . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Contact Header  . . . . . . . . . . . . . . . . . . . . .   8
     4.2.  Validation and Parameter Negotiation  . . . . . . . . . .  10
   5.  Established Session Operation . . . . . . . . . . . . . . . .  11
     5.1.  Message Type Codes  . . . . . . . . . . . . . . . . . . .  11
     5.2.  Upkeep and Status Messages  . . . . . . . . . . . . . . .  12
       5.2.1.  Session Upkeep (KEEPALIVE)  . . . . . . . . . . . . .  12
       5.2.2.  Message Rejection (REJECT)  . . . . . . . . . . . . .  13
     5.3.  Session Security  . . . . . . . . . . . . . . . . . . . .  14
       5.3.1.  TLS Handshake Result  . . . . . . . . . . . . . . . .  14
       5.3.2.  Example TLS Initiation  . . . . . . . . . . . . . . .  15
     5.4.  Bundle Transfer . . . . . . . . . . . . . . . . . . . . .  15
       5.4.1.  Bundle Transfer ID  . . . . . . . . . . . . . . . . .  16
       5.4.2.  Bundle Length (LENGTH)  . . . . . . . . . . . . . . .  16
       5.4.3.  Bundle Data Transmission (DATA_SEGMENT) . . . . . . .  17
       5.4.4.  Bundle Acknowledgments (ACK_SEGMENT)  . . . . . . . .  18
       5.4.5.  Bundle Refusal (REFUSE_BUNDLE)  . . . . . . . . . . .  19
   6.  Session Termination . . . . . . . . . . . . . . . . . . . . .  21
     6.1.  Shutdown Message (SHUTDOWN) . . . . . . . . . . . . . . .  21
     6.2.  Idle Session Shutdown . . . . . . . . . . . . . . . . . .  23
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  23
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  24
     8.1.  Port Number . . . . . . . . . . . . . . . . . . . . . . .  25
     8.2.  Protocol Versions . . . . . . . . . . . . . . . . . . . .  25
     8.3.  Message Types . . . . . . . . . . . . . . . . . . . . . .  26
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