The Session Initiation Protocol (SIP) P-Profile-Key Private Header (P-Header)
RFC 5002
| Document | Type |
RFC - Informational
(August 2007; Errata)
Was draft-camarillo-sipping-profile-key (individual in gen area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5002 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Jon Peterson | ||
| Send notices to | (None) | ||
Network Working Group G. Camarillo
Request for Comments: 5002 G. Blanco
Category: Informational Ericsson
August 2007
The Session Initiation Protocol (SIP)
P-Profile-Key Private Header (P-Header)
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Abstract
This document specifies the SIP P-Profile-Key P-header. This header
field is used in the 3rd-Generation Partnership Project (3GPP) IMS
(IP Multimedia Subsystem) to provide SIP registrars and SIP proxy
servers with the key of the profile corresponding to the destination
SIP URI of a particular SIP request.
Table of Contents
1. Introduction ....................................................2
2. Terminology .....................................................2
3. Scenario ........................................................2
4. Requirements ....................................................3
5. P-Profile-Key Header Field Definition ...........................3
6. Applicability ...................................................4
7. IANA Considerations .............................................4
8. Security Considerations .........................................5
9. Acknowledgements ................................................5
10. References .....................................................5
10.1. Normative References ......................................5
10.2. Informative References ....................................6
Author* Informational [Page 1]
RFC 5002 P-Profile-Key P-Header August 2007
1. Introduction
The 3rd-Generation Partnership Project (3GPP) IMS (IP Multimedia
Subsystem) uses SIP [RFC3261] as its main signalling protocol. (For
more information on the IMS, a detailed description can be found in
3GPP TS 23.228 [3GPP.23.228] and 3GPP TS 24.229 [3GPP.24.229]). 3GPP
has identified a set of requirements that can be met, according to
the procedures in [RFC3427], by defining a new SIP P-header.
The remainder of this document is organized as follows. Section 3
describes the scenario considered by 3GPP and Section 4 discusses the
requirements derived from this scenario. Section 5 defines the P-
Profile-Key header field, which meets those requirements, and Section
6 discusses the applicability and scope of this new header field.
Section 7 registers the P-Profile-Key header field with the IANA and
Section 8 discusses the security properties of the environment where
this header field is intended to be used.
2. Terminology
HSS: Home Subscriber Server.
I-CSCF: Interrogating - Call/Session Control Function.
Public Service Identity:
A SIP URI that refers to a service instead of a user.
S-CSCF: Serving - Call/Session Control Function.
Wildcarded Public Service Identity:
A set of Public Service Identities that match a regular
expression and share the same profile.
3. Scenario
In the 3GPP IMS, there are scenarios where a set of proxies handling
a request need to consult the same user database, as described in
[RFC4457]. Those proxies typically use the destination SIP URI of
the request as the key for their database queries. Nevertheless,
when a proxy handles a Wildcarded Public Service Identity, the key to
be used in its database query is not the destination SIP URI of the
request, but a regular expression instead.
Public Service Identities are SIP URIs that refer to services instead
of users. That is, they address a specific application in an
Application Server. Wildcarded Public Service Identities are a set
of Public Service Identities that match a regular expression and
share the same profile. For example, the Public Service Identities
Author* Informational [Page 2]
RFC 5002 P-Profile-Key P-Header August 2007
'sip:chatroom-12@example.com' and 'sip:chatroom-657@example.com'
would match the Wildcarded Public Service Identity
'sip:chatroom-!.*!@example.com'. For a description of Wildcarded
Public Service Identities, see 3GPP TS 23.003 [3GPP.23.003].
When a proxy queries the user database for a Public Service Identity
for which there is no profile in the user database, the user database
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