Dynamic Delegation Discovery System (DDDS) Part Three: The Domain Name System (DNS) Database
RFC 3403
| Document | Type | RFC - Proposed Standard (October 2002; Errata) | |
|---|---|---|---|
| Author | Michael Mealling | ||
| Last updated | 2015-10-14 | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 3403 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Patrik Fältström | ||
| IESG note | Responsible: RFC Editor | ||
| Send notices to | <jcurran@netgeeks.net> | ||
Network Working Group M. Mealling
Request for Comments: 3403 VeriSign
Obsoletes: 2915, 2168 October 2002
Category: Standards Track
Dynamic Delegation Discovery System (DDDS)
Part Three: The Domain Name System (DNS) Database
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 Internet Society (2002). All Rights Reserved.
Abstract
This document describes a Dynamic Delegation Discovery System (DDDS)
Database using the Domain Name System (DNS) as a distributed database
of Rules. The Keys are domain-names and the Rules are encoded using
the Naming Authority Pointer (NAPTR) Resource Record (RR).
Since this document obsoletes RFC 2915, it is the official
specification for the NAPTR DNS Resource Record. It is also part of
a series that is completely specified in "Dynamic Delegation
Discovery System (DDDS) Part One: The Comprehensive DDDS" (RFC 3401).
It is very important to note that it is impossible to read and
understand any document in this series without reading the others.
Mealling Standards Track [Page 1]
RFC 3403 DDDS DNS Database October 2002
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3
3. DDDS Database Specification . . . . . . . . . . . . . . . . 3
4. NAPTR RR Format . . . . . . . . . . . . . . . . . . . . . . 5
4.1 Packet Format . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Additional Information Processing . . . . . . . . . . . . . 7
4.2.1 Additional Section processing by DNS servers . . . . . . . . 7
4.2.2 Additional Section processing by resolver/applications . . . 7
4.3 Master File Format . . . . . . . . . . . . . . . . . . . . . 7
5. Application Specifications . . . . . . . . . . . . . . . . . 8
6. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1 URN Example . . . . . . . . . . . . . . . . . . . . . . . . 8
6.2 E164 Example . . . . . . . . . . . . . . . . . . . . . . . . 10
7. Advice for DNS Administrators . . . . . . . . . . . . . . . 10
8. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . 11
10. Security Considerations . . . . . . . . . . . . . . . . . . 11
References . . . . . . . . . . . . . . . . . . . . . . . . . 12
Author's Address . . . . . . . . . . . . . . . . . . . . . . 13
Full Copyright Statement . . . . . . . . . . . . . . . . . . 14
1. Introduction
The Dynamic Delegation Discovery System (DDDS) is used to implement
lazy binding of strings to data, in order to support dynamically
configured delegation systems. The DDDS functions by mapping some
unique string to data stored within a DDDS Database by iteratively
applying string transformation rules until a terminal condition is
reached.
This document describes the way in which the Domain Name System (DNS)
is used as a data store for the Rules that allow a DDDS Application
to function. It does not specify any particular application or usage
scenario. The entire series of documents is specified in "Dynamic
Delegation Discovery System (DDDS) Part One: The Comprehensive DDDS"
(RFC 3401) [1]. It is very important to note that it is impossible
to read and understand any document in that series without reading
the related documents.
The Naming Authority Pointer (NAPTR) DNS Resource Record (RR)
specified here was originally produced by the URN Working Group as a
way to encode rule-sets in DNS so that the delegated sections of a
Uniform Resource Identifiers (URI) could be decomposed in such a way
that they could be changed and re-delegated over time. The result
was a Resource Record that included a regular expression that would
be used by a client program to rewrite a string into a domain name.
Mealling Standards Track [Page 2]
RFC 3403 DDDS DNS Database October 2002
Regular expressions were chosen for their compactness to expressivity
ratio allowing for a great deal of information to be encoded in a
rather small DNS packet.
Over time this process was generalized for other Applications and
Rule Databases. This document defines a Rules Database absent any
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