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- Network Working Group C. Huitema
- Internet Draft INRIA
- Expiration Date: September 1993 March 1993
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- SIP addresses in the domain name service
- Specifications
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- C. Huitema
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- Christian.Huitema@sophia.inria.fr
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- 1. Status of this Memo
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- This document is an Internet Draft. Internet Drafts are working
- documents of the Internet Engineering Task Force (IETF), its Areas,
- and its Working Groups. Note that other groups may also distribute
- working documents as Internet Drafts.
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- Internet Drafts are draft documents valid for a maximum of six
- months. Internet Drafts may be updated, replaced, or obsoleted
- by other documents at any time. It is not appropriate to use
- Internet Drafts as reference material or to cite them other than
- as a "working draft" or "work in progress."
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- Please check the I-D abstract listing contained in each Internet
- Draft directory to learn the current status of this or any
- other Internet Draft.
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- This document defines the conventions for storing 64 bits SIP
- addresses and the corresponding reverse records in the domain
- name service.
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- This document is an output of the SIP working group. It
- defines a complement to the RFC-1035, "DOMAIN NAMES -
- IMPLEMENTATION AND SPECIFICATION".
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- Distribution of this memo is unlimited. Questions should be
- directed to the editor.
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- Internet draft SIP and DNS
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- 2. Overview
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- In order to store the addresses of SIP systems in the domain
- name service, a new record format of type AA is created. The
- information part of this record shall contain a 64 bits SIP
- address.
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- In order to allow easy retrieval of the domain names of SIP
- systems, a special naming domain is defined.
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- 3. The AA Type value
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- The TYPE value associated to the AA record is <to be defined
- by IANA>.
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- 4. The AA RDATA format
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- ____________________________
- | ADDRESS |
- |___________________________|
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- where ADDRESS is a 64 bits SIP address, in "network byte
- order".
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- Hosts that have multiple SIP addresses will have multiple AA
- records.
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- 5. The inverse domain
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- The inverse domain used to support gateway location and SIP
- address to domain name mapping is <to be defined by IANA>.
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- Domain names in the <to be defined> domain are defined to have
- up to six labels in addition to the <to be defined> suffix.
- The two most significant tokens represent each two octets of
- the SIP address expressed as a character string for an
- hexadecimal value in the range 0-FFFF (with leading zeros
- omitted except in the case of a null value which is
- represented by a single zero). The last four tokens each
- represent one octet of a SIP address, expressed as a character
- string for an decimal value in the range 0-FF (with leading
- zeros omitted except in the case of a zero octet which is
- represented by a single zero). Four example, the name
- corresponding to the SIP address:
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- C. Huitema [Page 2]
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- Internet draft SIP and DNS
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- 0abc:f120:138.96.24.84
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- can be obtained through the inverse domain name:
- 84.24.96.138.f120.abc.sip-addr.arpa
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- 6. Provisional conventions
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- Pending allocation of a record type by IANA, the value 64 is
- used for type AA.
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- Pending allocation of an inverse domain by IANA, the value
- <SIP-ADDR.ARPA> is used.
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- These values shall only be used during the early tests inside
- the SIP WG. This section will be removed before final
- publication of this document.
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- C. Huitema [Page 3]
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