A Lightweight UDP Transfer Protocol for the Internet Registry Information Service
RFC 4993

Document Type RFC - Proposed Standard (August 2007; Errata)
Last updated 2013-03-02
Stream IETF
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IESG IESG state RFC 4993 (Proposed Standard)
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Responsible AD Ted Hardie
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Network Working Group                                          A. Newton
Request for Comments: 4993                                VeriSign, Inc.
Category: Standards Track                                    August 2007

                  A Lightweight UDP Transfer Protocol
             for the Internet Registry Information Service

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   This document describes a lightweight UDP transfer protocol for the
   Internet Registry Information Service (IRIS).  This transfer protocol
   uses a single packet for every request and response, and optionally
   employs compression over the contents of the packet.

Newton                      Standards Track                     [Page 1]
RFC 4993      Lightweight UDP Transfer Protocol for IRIS     August 2007

Table of Contents

   1. Introduction ....................................................3
   2. Document Terminology ............................................3
   3. Packet Format ...................................................4
      3.1. Payload Descriptor .........................................4
           3.1.1. Payload Request Descriptor ..........................4
           3.1.2. Payload Response Descriptor .........................5
           3.1.3. Payload Header ......................................6
           3.1.4. Payload Types .......................................6
           3.1.5. Version Information .................................7
           3.1.6. Size Information ....................................8
           3.1.7. Other Information ...................................8
   4. Interactions ....................................................9
   5. Internationalization Considerations ............................10
   6. IRIS Transport Mapping Definitions .............................10
      6.1. URI Scheme ................................................10
      6.2. Application Protocol Label ................................10
   7. IANA Considerations ............................................10
      7.1. Registrations .............................................10
           7.1.1. URI Scheme Registration ............................10
           7.1.2. Well-known UDP Port Registration ...................11
           7.1.3. S-NAPTR Registration ...............................11
   8. Security Considerations ........................................12
   9. References .....................................................13
      9.1. Normative References ......................................13
      9.2. Informative References ....................................13
   Appendix A. Examples ..............................................14
   Appendix B. Contributors ..........................................18

Newton                      Standards Track                     [Page 2]
RFC 4993      Lightweight UDP Transfer Protocol for IRIS     August 2007

1.  Introduction

   Using Straightforward Name Authority Pointers (S-NAPTR) [4], IRIS has
   the ability to define the use of multiple application transports or
   transfer protocols for different types of registry services, all at
   the discretion of the server operator.  The UDP transfer protocol
   defined in this document is completely independent of the registry
   types for which it can carry data.

   The binding of this UDP transfer protocol to IRIS is called IRIS-LWZ
   (for IRIS Lightweight using Compression).  Its message exchange
   pattern is simple: a client sends a request in one UDP packet, and a
   server responds with an answer in one UDP packet.

   IRIS-LWZ packets are composed of two parts, a binary payload
   descriptor and a request/response transaction payload.  The request/
   response transaction payload may be compressed using the DEFLATE [1]
   algorithm.

2.  Document Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [6].

   Octet fields with numeric values are given according to the
   conventions in RFC 1166 [10]: the leftmost bit of the whole field is
   the most significant bit; when a multi-octet quantity is transmitted
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