Internet Engineering Task Force (IETF) P. Saint-Andre
Request for Comments: 6121 Cisco
Obsoletes: 3921 March 2011
Category: Standards Track
ISSN: 2070-1721
Extensible Messaging and Presence Protocol (XMPP):
Instant Messaging and Presence
Abstract
This document defines extensions to core features of the Extensible
Messaging and Presence Protocol (XMPP) that provide basic instant
messaging (IM) and presence functionality in conformance with the
requirements in RFC 2779. This document obsoletes RFC 3921.
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/rfc6121.
Copyright Notice
Copyright (c) 2011 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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Saint-Andre Standards Track [Page 1]
RFC 6121 XMPP IM March 2011
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2. History . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Requirements . . . . . . . . . . . . . . . . . . . . . . 5
1.4. Functional Summary . . . . . . . . . . . . . . . . . . . 7
1.5. Terminology . . . . . . . . . . . . . . . . . . . . . . . 8
2. Managing the Roster . . . . . . . . . . . . . . . . . . . . . 9
2.1. Syntax and Semantics . . . . . . . . . . . . . . . . . . 9
2.1.1. Ver Attribute . . . . . . . . . . . . . . . . . . . . 10
2.1.2. Roster Items . . . . . . . . . . . . . . . . . . . . 10
2.1.2.1. Approved Attribute . . . . . . . . . . . . . . . 10
2.1.2.2. Ask Attribute . . . . . . . . . . . . . . . . . . 10
2.1.2.3. JID Attribute . . . . . . . . . . . . . . . . . . 11
2.1.2.4. Name Attribute . . . . . . . . . . . . . . . . . 11
2.1.2.5. Subscription Attribute . . . . . . . . . . . . . 11
2.1.2.6. Group Element . . . . . . . . . . . . . . . . . . 12
2.1.3. Roster Get . . . . . . . . . . . . . . . . . . . . . 12
2.1.4. Roster Result . . . . . . . . . . . . . . . . . . . . 13
2.1.5. Roster Set . . . . . . . . . . . . . . . . . . . . . 14
2.1.6. Roster Push . . . . . . . . . . . . . . . . . . . . . 14
2.2. Retrieving the Roster on Login . . . . . . . . . . . . . 16
2.3. Adding a Roster Item . . . . . . . . . . . . . . . . . . 17
2.3.1. Request . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.2. Success Case . . . . . . . . . . . . . . . . . . . . 17
2.3.3. Error Cases . . . . . . . . . . . . . . . . . . . . . 18
2.4. Updating a Roster Item . . . . . . . . . . . . . . . . . 22
2.4.1. Request . . . . . . . . . . . . . . . . . . . . . . . 22
2.4.2. Success Case . . . . . . . . . . . . . . . . . . . . 24
2.4.3. Error Cases . . . . . . . . . . . . . . . . . . . . . 24
2.5. Deleting a Roster Item . . . . . . . . . . . . . . . . . 24
2.5.1. Request . . . . . . . . . . . . . . . . . . . . . . . 24
2.5.2. Success Case . . . . . . . . . . . . . . . . . . . . 25
2.5.3. Error Cases . . . . . . . . . . . . . . . . . . . . . 26
2.6. Roster Versioning . . . . . . . . . . . . . . . . . . . . 26
2.6.1. Stream Feature . . . . . . . . . . . . . . . . . . . 26
2.6.2. Request . . . . . . . . . . . . . . . . . . . . . . . 26
2.6.3. Success Case . . . . . . . . . . . . . . . . . . . . 27
3. Managing Presence Subscriptions . . . . . . . . . . . . . . . 30
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