Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
draft-ietf-dtn-tcpclv4-02

Document Type Active Internet-Draft (dtn WG)
Last updated 2017-05-21
Replaces draft-sipos-dtn-tcpclv4
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Delay Tolerant Networking                                       B. Sipos
Internet-Draft                                           RKF Engineering
Obsoletes: 7242 (if approved)                                  M. Demmer
Intended status: Standards Track                             UC Berkeley
Expires: November 23, 2017                                        J. Ott
                                                        Aalto University
                                                            S. Perreault
                                                            May 22, 2017

   Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
                       draft-ietf-dtn-tcpclv4-02

Abstract

   This document describes a revised protocol for the TCP-based
   convergence layer (TCPCL) for Delay-Tolerant Networking (DTN).  The
   protocol revision is based on implementation issues in the original
   TCPCL Version 3 and updates to the Bundle Protocol contents,
   encodings, and convergence layer requirements in Bundle Protocl
   Version 7.  Several new IANA registries are defined for TCPCLv4 which
   define some behaviors inherited from TCPCLv3 but with updated
   encodings and/or semantics.

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
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   This Internet-Draft will expire on November 23, 2017.

Copyright Notice

   Copyright (c) 2017 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

Sipos, et al.           Expires November 23, 2017               [Page 1]
Internet-Draft                 DTN TCPCLv4                      May 2017

   (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
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   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  . . . . . . . . . . . . . . . .   7
   4.  Session Establishment . . . . . . . . . . . . . . . . . . . .   8
     4.1.  Contact Header  . . . . . . . . . . . . . . . . . . . . .  10
       4.1.1.  Header Extension Items  . . . . . . . . . . . . . . .  11
     4.2.  Validation and Parameter Negotiation  . . . . . . . . . .  13
   5.  Established Session Operation . . . . . . . . . . . . . . . .  14
     5.1.  Message Type Codes  . . . . . . . . . . . . . . . . . . .  14
     5.2.  Upkeep and Status Messages  . . . . . . . . . . . . . . .  15
       5.2.1.  Session Upkeep (KEEPALIVE)  . . . . . . . . . . . . .  15
       5.2.2.  Message Rejection (MSG_REJECT)  . . . . . . . . . . .  16
     5.3.  Session Security  . . . . . . . . . . . . . . . . . . . .  17
       5.3.1.  TLS Handshake Result  . . . . . . . . . . . . . . . .  17
       5.3.2.  Example TLS Initiation  . . . . . . . . . . . . . . .  18
     5.4.  Bundle Transfer . . . . . . . . . . . . . . . . . . . . .  18
       5.4.1.  Bundle Transfer ID  . . . . . . . . . . . . . . . . .  19
       5.4.2.  Transfer initialization (XFER_INIT) . . . . . . . . .  19
       5.4.3.  Data Transmission (XFER_SEGMENT)  . . . . . . . . . .  20
       5.4.4.  Data Acknowledgments (XFER_ACK) . . . . . . . . . . .  22
       5.4.5.  Transfer Refusal (XFER_REFUSE)  . . . . . . . . . . .  23
   6.  Session Termination . . . . . . . . . . . . . . . . . . . . .  24
     6.1.  Shutdown Message (SHUTDOWN) . . . . . . . . . . . . . . .  25
     6.2.  Idle Session Shutdown . . . . . . . . . . . . . . . . . .  27
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  27
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