Additional Policies for the Partially Reliable Stream Control Transmission Protocol Extension
RFC 7496
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RFC - Proposed Standard
(April 2015; No errata)
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Last updated |
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2015-10-14
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Replaces |
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draft-tuexen-tsvwg-sctp-prpolicies
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IETF
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plain text
pdf
html
bibtex
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Gorry Fairhurst
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Shepherd write-up |
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Show
(last changed 2014-10-27)
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| IESG |
IESG state |
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RFC 7496 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Spencer Dawkins
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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No IANA Actions
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Internet Engineering Task Force (IETF) M. Tuexen
Request for Comments: 7496 Muenster Univ. of Appl. Sciences
Category: Standards Track R. Seggelmann
ISSN: 2070-1721 Metafinanz Informationssysteme GmbH
R. Stewart
Netflix, Inc.
S. Loreto
Ericsson
April 2015
Additional Policies for the Partially Reliable
Stream Control Transmission Protocol Extension
Abstract
This document defines two additional policies for the Partially
Reliable Stream Control Transmission Protocol (PR-SCTP) extension.
These policies allow limitation of the number of retransmissions and
prioritization of user messages for more efficient usage of the send
buffer.
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/rfc7496.
Tuexen, et al. Standards Track [Page 1]
RFC 7496 Additional PR-SCTP Policies April 2015
Copyright Notice
Copyright (c) 2015 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 . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Additional PR-SCTP Policies . . . . . . . . . . . . . . . . . 3
3.1. Limited Retransmissions Policy . . . . . . . . . . . . . 3
3.2. Priority Policy . . . . . . . . . . . . . . . . . . . . . 4
4. Socket API Considerations . . . . . . . . . . . . . . . . . . 4
4.1. Data Types . . . . . . . . . . . . . . . . . . . . . . . 5
4.2. Support for Added PR-SCTP Policies . . . . . . . . . . . 5
4.3. Socket Option for Getting the Stream-Specific PR-SCTP
Status (SCTP_PR_STREAM_STATUS) . . . . . . . . . . . . . 6
4.4. Socket Option for Getting the Association-Specific
PR-SCTP Status (SCTP_PR_ASSOC_STATUS) . . . . . . . . . . 7
4.5. Socket Option for Getting and Setting the PR-SCTP Support
(SCTP_PR_SUPPORTED) . . . . . . . . . . . . . . . . . . . 8
5. Security Considerations . . . . . . . . . . . . . . . . . . . 9
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1. Normative References . . . . . . . . . . . . . . . . . . 9
6.2. Informative References . . . . . . . . . . . . . . . . . 9
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 11
Tuexen, et al. Standards Track [Page 2]
RFC 7496 Additional PR-SCTP Policies April 2015
1. Introduction
The Partially Reliable SCTP (PR-SCTP) extension defined in [RFC3758]
provides a generic method for senders to abandon user messages. The
decision to abandon a user message is sender side only, and the exact
condition is called a "PR-SCTP policy" ([RFC3758] refers to them as
"PR-SCTP Services"). [RFC3758] also defines one particular PR-SCTP
policy, called "Timed Reliability". This allows the sender to
specify a timeout for a user message after which the SCTP stack
abandons the user message.
This document specifies the following two additional PR-SCTP
policies:
Limited Retransmission Policy: Allows limitation of the number of
retransmissions.
Priority Policy: Allows removal of lower-priority messages if space
for higher-priority messages is needed in the send buffer.
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