0-RTT TCP Convert Protocol
draft-ietf-tcpm-converters-01

Document Type Active Internet-Draft (tcpm WG)
Last updated 2018-03-05
Replaces draft-bonaventure-mptcp-converters
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TCPM Working Group                                   O. Bonaventure, Ed.
Internet-Draft                                                  Tessares
Intended status: Experimental                          M. Boucadair, Ed.
Expires: September 6, 2018                                        Orange
                                                              B. Peirens
                                                                Proximus
                                                                  S. Seo
                                                           Korea Telecom
                                                            A. Nandugudi
                                                      Memphis University
                                                          March 05, 2018

                       0-RTT TCP Convert Protocol
                     draft-ietf-tcpm-converters-01

Abstract

   This document specifies an application proxy, called Transport
   Converter, to assist the deployment of TCP extensions such as
   Multipath TCP.  This proxy is designed to avoid inducing extra delay
   when involved in a network-assisted connection (that is, 0-RTT).
   This specification assumes an explicit model, where the proxy is
   explicitly configured on hosts.

   -- Editorial Note (To be removed by RFC Editor)

   Please update these statements with the RFC number to be assigned to
   this document:
   [This-RFC]

   Please update TBA statements with the port number to be assigned to
   the Converter Protocol.

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
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   material or to cite them other than as "work in progress."

Bonaventure, et al.     Expires September 6, 2018               [Page 1]
Internet-Draft              Convert Protocol                  March 2018

   This Internet-Draft will expire on September 6, 2018.

Copyright Notice

   Copyright (c) 2018 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
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   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  . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Architecture  . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Functional Elements . . . . . . . . . . . . . . . . . . .   5
     3.2.  Theory of Operation . . . . . . . . . . . . . . . . . . .   7
     3.3.  Sample Examples of Outgoing Converter-Assisted Multipath
           TCP Connections . . . . . . . . . . . . . . . . . . . . .  10
     3.4.  Sample Example of Incoming Converter-Assisted Multipath
           TCP Connection  . . . . . . . . . . . . . . . . . . . . .  11
   4.  The Converter Protocol (Convert)  . . . . . . . . . . . . . .  12
     4.1.  The Convert Fixed Header  . . . . . . . . . . . . . . . .  12
     4.2.  Convert TLVs  . . . . . . . . . . . . . . . . . . . . . .  13
       4.2.1.  Generic Convert TLV Format  . . . . . . . . . . . . .  13
       4.2.2.  Summary of Supported Convert TLVs . . . . . . . . . .  14
       4.2.3.  The Bootstrap TLV . . . . . . . . . . . . . . . . . .  15
       4.2.4.  Supported TCP Extension Services TLV  . . . . . . . .  15
       4.2.5.  Connect TLV . . . . . . . . . . . . . . . . . . . . .  16
       4.2.6.  Extended TCP Header TLV . . . . . . . . . . . . . . .  17
       4.2.7.  Error TLV . . . . . . . . . . . . . . . . . . . . . .  18
   5.  Compatibility of Specific TCP Options with the Conversion
       Service . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
     5.1.  Base TCP Options  . . . . . . . . . . . . . . . . . . . .  21
     5.2.  Window Scale (WS) . . . . . . . . . . . . . . . . . . . .  21
     5.3.  Selective Acknowledgements  . . . . . . . . . . . . . . .  22
     5.4.  Timestamp . . . . . . . . . . . . . . . . . . . . . . . .  22
     5.5.  Multipath TCP . . . . . . . . . . . . . . . . . . . . . .  23
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