Flexible Session Protocol
draft-gao-flexible-session-protocol-04

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Network Working Group                                             J. Gao
Internet-Draft                                                Individual
Intended status: Experimental                             April 17, 2020
Expires: October 19, 2020

                       Flexible Session Protocol
                 draft-gao-flexible-session-protocol-04

Abstract

   FSP is a connection-oriented transport layer protocol that provides
   mobility and multihoming support by introducing the concept of 'upper
   layer thread ID', which is associated with some shared secret that is
   applied with some secure hash or authenticated encryption algorithm
   to protect authenticity of the origin of the FSP packets.  It is able
   to provide following services to the upper layer application:

   o  Stream-oriented send-receive with native message boundary

      support

        o  Ubiquitous authenticated encryption
   o  0-RTT multiplication of connections
   o  On-the-wire compression

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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   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."

   This Internet-Draft will expire on October 19, 2020.

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Copyright Notice

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   8
     1.1.  Features  . . . . . . . . . . . . . . . . . . . . . . . .   9
       1.1.1.  Transmit Transaction  . . . . . . . . . . . . . . . .   9
       1.1.2.  Transport Layer Mobility Support  . . . . . . . . . .   9
       1.1.3.  Ubiquitous Authenticated Encryption . . . . . . . . .   9
       1.1.4.  0-RTT Multiplication of Connections . . . . . . . . .   9
       1.1.5.  On-the-wire Compression . . . . . . . . . . . . . . .   9
     1.2.  Requirements Language . . . . . . . . . . . . . . . . . .  10
     1.3.  Conventions . . . . . . . . . . . . . . . . . . . . . . .  10
   2.  Abbreviations and Idioms  . . . . . . . . . . . . . . . . . .  11
   3.  Key Mechanisms  . . . . . . . . . . . . . . . . . . . . . . .  13
     3.1.  Underlying Layer Services Required  . . . . . . . . . . .  13
       3.1.1.  High Mobility . . . . . . . . . . . . . . . . . . . .  13
       3.1.2.  Network Address Change Notification . . . . . . . . .  13
       3.1.3.  Network Congestion Control  . . . . . . . . . . . . .  14
     3.2.  Identifying Connection by Local ULTID . . . . . . . . . .  14
     3.3.  Defending Against Connection Hijacking with ICC . . . . .  14
     3.4.  Synchronizing Key Installation with Transmit Transaction   15
     3.5.  0-RTT Connection Multiplication with OOB Packet . . . . .  15
   4.  Packet Structure  . . . . . . . . . . . . . . . . . . . . . .  16
     4.1.  FSP over UDP/IPv4 . . . . . . . . . . . . . . . . . . . .  16
     4.2.  FSP over IPv6 . . . . . . . . . . . . . . . . . . . . . .  17
     4.3.  Generic FSP Header  . . . . . . . . . . . . . . . . . . .  19
     4.4.  FSP Header Signature and Code-Mark-Length Prefix  . . . .  19
       4.4.1.  Operation Code  . . . . . . . . . . . . . . . . . . .  20
       4.4.2.  Major . . . . . . . . . . . . . . . . . . . . . . . .  21
       4.4.3.  Mark  . . . . . . . . . . . . . . . . . . . . . . . .  21
       4.4.4.  Offset  . . . . . . . . . . . . . . . . . . . . . . .  22
       4.4.5.  Length  . . . . . . . . . . . . . . . . . . . . . . .  22
     4.5.  Preliminary FSP Packets . . . . . . . . . . . . . . . . .  22
       4.5.1.  Connect Initialization  . . . . . . . . . . . . . . .  22

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