Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
draft-ietf-dtn-tcpclv4-02
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2017-05-21
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draft-sipos-dtn-tcpclv4
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Dec 2016 - TCP CL update...
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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
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 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
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 . . . . . . . . . . . . . . . . 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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