Flow Identity Extension for HTTP-Enabled Location Delivery (HELD)
RFC 6915
Document | Type |
RFC - Proposed Standard
(April 2013; No errata)
Updates RFC 6155
|
|
---|---|---|---|
Author | Ray Bellis | ||
Last updated | 2018-12-20 | ||
Replaces | draft-bellis-geopriv-flow-identity | ||
Stream | Internet Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6915 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Robert Sparks | ||
IESG note | Alissa Cooper (acooper@cdt.org) is the Document Shepherd. | ||
Send notices to | (None) | ||
IANA | IANA review state | IANA - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) R. Bellis Request for Comments: 6915 Nominet UK Updates: 6155 April 2013 Category: Standards Track ISSN: 2070-1721 Flow Identity Extension for HTTP-Enabled Location Delivery (HELD) Abstract RFC 6155 specifies an extension for the HTTP-Enabled Location Delivery (HELD) protocol, allowing the use of an IP address and port number to request a Device location based on an individual packet flow. However, certain kinds of NAT require that identifiers for both ends of the packet flow must be specified in order to unambiguously satisfy the location request. This document specifies an XML Schema and a URN Sub-Namespace for a Flow Identity Extension for HELD to support this requirement. This document updates RFC 6155 by deprecating the port number elements specified therein. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6915. Bellis Standards Track [Page 1] RFC 6915 Flow Identity for HELD April 2013 Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions Used in This Document . . . . . . . . . . . . . . 3 3. Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4. XML Schema . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6 5.1. URN Sub-Namespace Registration for urn:ietf:params:xml:ns:geopriv:held:flow . . . . . . . . . 6 5.2. XML Schema Registration . . . . . . . . . . . . . . . . . 7 6. Privacy Considerations . . . . . . . . . . . . . . . . . . . . 7 7. Security Considerations . . . . . . . . . . . . . . . . . . . 8 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 8 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8 9.1. Normative References . . . . . . . . . . . . . . . . . . . 8 9.2. Informative References . . . . . . . . . . . . . . . . . . 8 Bellis Standards Track [Page 2] RFC 6915 Flow Identity for HELD April 2013 1. Introduction Work at the Emergency Location Task Group of NICC Standards Limited (the UK's telecoms industry standards body) prompted the addition of port number identifiers in HELD Identity [RFC6155] to allow HELD [RFC5985] requests for Devices that are behind NAT devices. Subsequent analysis has determined that in the presence of particular types of NAT devices, and in particular Carrier Grade NATs, it is necessary to know the complete tuple of (Layer 3 protocol, Layer 4 protocol, source address, source port, destination address, destination port) in order to unambiguously identify a flow, and subsequently the true Device. This document specifies an XML Schema and a URN Sub-Namespace for a Flow Identity Extension to support this requirement and provides a more generally applicable means of identifying a Device based on the parameters of a network flow of which it is an endpoint. Since the Location Recipient may not know in advance whether the Device is behind a NAT device, the port number elements from Section 3.3 of [RFC6155] are deprecated and MUST NOT be used in new client implementations. Note that server implementations of this specification may still encounter requests formed by clients that have implemented only [RFC6155], and those requests might contain the deprecated port element. For implementation details not specified in this document, pleaseShow full document text