Transport Options for UDP
draft-touch-tsvwg-udp-options-09

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TSVWG                                                          J. Touch
Internet Draft                                                  USC/ISI
Intended status: Standards Track                           May 16, 2017
Intended updates: 768
Expires: November 2017

                         Transport Options for UDP
                   draft-touch-tsvwg-udp-options-09.txt

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   This Internet-Draft is submitted in full conformance with the
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Abstract

   Transport protocols are extended through the use of transport header
   options. This document experimentally extends UDP by indicating the
   location, syntax, and semantics for UDP transport layer options.

Table of Contents

   1. Introduction...................................................2
   2. Conventions used in this document..............................3
   3. Background.....................................................3
   4. The UDP Option Area............................................4
   5. UDP Options....................................................7
      5.1. End of Options List (EOL).................................8
      5.2. No Operation (NOP)........................................8
      5.3. Option Checksum (OCS).....................................9
      5.4. Alternate Checksum (ACS).................................10
      5.5. Lite (LITE)..............................................10
      5.6. Maximum Segment Size (MSS)...............................12
      5.7. Timestamps (TIME)........................................13
      5.8. Fragmentation (FRAG).....................................13
         5.8.1. Coupling FRAG with LITE.............................16
      5.9. Authentication and Encryption (AE).......................16
      5.10. Experimental (EXP)......................................17
   6. UDP API Extensions............................................17
   7. Whose options are these?......................................18
   8. UDP options vs. UDP-Lite......................................18
   9. Interactions with Legacy Devices..............................19
   10. Options in a Stateless, Unreliable Transport Protocol........20
   11. UDP Option State Caching.....................................20
   12. Security Considerations......................................21
   13. IANA Considerations..........................................22
   14. References...................................................22
      14.1. Normative References....................................22
      14.2. Informative References..................................22
   15. Acknowledgments..............................................24
   Appendix A. Implementation Information...........................26

1. Introduction

   Transport protocols use options as a way to extend their
   capabilities. TCP [RFC793], SCTP [RFC4960], and DCCP [RFC4340]
   include space for these options but UDP [RFC768] currently does not.
   This document defines an experimental extension to UDP that provides
   space for transport options including their generic syntax and

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