Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
draft-ietf-dtn-tcpclv4-22
| Document | Type | Active Internet-Draft (dtn WG) | |
|---|---|---|---|
| Authors | Brian Sipos , Michael Demmer , Joerg Ott , Simon Perreault | ||
| Last updated | 2020-10-26 | ||
| Replaces | draft-sipos-dtn-tcpclv4 | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text xml pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication (wg milestone: Jul 2019 - TCP CL update... ) | |
| Document shepherd | Edward Birrane | ||
| Shepherd write-up | Show (last changed 2019-08-07) | ||
| IESG | IESG state | IESG Evaluation::AD Followup | |
| Consensus Boilerplate | Yes | ||
| Telechat date |
Has a DISCUSS. Needs 4 more YES or NO OBJECTION positions to pass. |
||
| Responsible AD | Magnus Westerlund | ||
| Send notices to | Edward Birrane <edward.birrane@jhuapl.edu> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
Delay-Tolerant Networking B. Sipos
Internet-Draft RKF Engineering
Intended status: Standards Track M. Demmer
Expires: April 29, 2021 UC Berkeley
J. Ott
Aalto University
S. Perreault
October 26, 2020
Delay-Tolerant Networking TCP Convergence Layer Protocol Version 4
draft-ietf-dtn-tcpclv4-22
Abstract
This document describes a TCP-based convergence layer (TCPCL) for
Delay-Tolerant Networking (DTN). This version of the TCPCL protocol
resolves implementation issues in the earlier TCPCL Version 3 of
RFC7242 and updates to the Bundle Protocol (BP) contents, encodings,
and convergence layer requirements in BP Version 7. Specifically,
the TCPCLv4 uses CBOR-encoded BPv7 bundles as its service data unit
being transported and provides a reliable transport of such bundles.
This version of TCPCL also includes security and extensibility
mechanisms.
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 https://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 April 29, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Sipos, et al. Expires April 29, 2021 [Page 1]
Internet-Draft DTN TCPCLv4 October 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 5
2.1. Definitions Specific to the TCPCL Protocol . . . . . . . 5
3. General Protocol Description . . . . . . . . . . . . . . . . 9
3.1. Convergence Layer Services . . . . . . . . . . . . . . . 9
3.2. TCPCL Session Overview . . . . . . . . . . . . . . . . . 11
3.3. TCPCL States and Transitions . . . . . . . . . . . . . . 13
3.4. PKIX Environments and CA Policy . . . . . . . . . . . . . 19
3.5. Session Keeping Policies . . . . . . . . . . . . . . . . 20
3.6. Transfer Segmentation Policies . . . . . . . . . . . . . 21
3.7. Example Message Exchange . . . . . . . . . . . . . . . . 22
4. Session Establishment . . . . . . . . . . . . . . . . . . . . 23
4.1. TCP Connection . . . . . . . . . . . . . . . . . . . . . 24
4.2. Contact Header . . . . . . . . . . . . . . . . . . . . . 25
4.3. Contact Validation and Negotiation . . . . . . . . . . . 26
4.4. Session Security . . . . . . . . . . . . . . . . . . . . 27
4.4.1. Entity Identification . . . . . . . . . . . . . . . . 28
4.4.2. TLS Handshake . . . . . . . . . . . . . . . . . . . . 29
4.4.3. TLS Authentication . . . . . . . . . . . . . . . . . 30
4.4.4. Example TLS Initiation . . . . . . . . . . . . . . . 32
4.5. Message Header . . . . . . . . . . . . . . . . . . . . . 33
4.6. Session Initialization Message (SESS_INIT) . . . . . . . 34
4.7. Session Parameter Negotiation . . . . . . . . . . . . . . 36
4.8. Session Extension Items . . . . . . . . . . . . . . . . . 37
5. Established Session Operation . . . . . . . . . . . . . . . . 38
5.1. Upkeep and Status Messages . . . . . . . . . . . . . . . 38
5.1.1. Session Upkeep (KEEPALIVE) . . . . . . . . . . . . . 38
5.1.2. Message Rejection (MSG_REJECT) . . . . . . . . . . . 39
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