Network Working Group T. Dreibholz
Internet-Draft Simula Research Laboratory
Intended status: Experimental R. Seggelmann
Expires: July 6, 2013 Muenster Univ. of App. Sciences
M. Becke
University of Duisburg-Essen
January 2, 2013
Sender Queue Info Option for the SCTP Socket API
draft-dreibholz-tsvwg-sctpsocket-sqinfo-05.txt
Abstract
This document describes an extension to the SCTP sockets API for
querying information about the sender queue.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Conventions . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Sender Queue Info (SCTP_SQINFO) . . . . . . . . . . . . . . . . 3
3. Testbed Platform . . . . . . . . . . . . . . . . . . . . . . . 4
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 4
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6
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1. Introduction
This draft describes an extension to the SCTP sockets API (see
[RFC6458], [I-D.dreibholz-tsvwg-sctpsocket-multipath] [RFC4960])
which allows an application to query the sender queue utilization per
stream. This information is necessary for applications to make
efficient use of a mapping of streams to dissimilar paths. A
detailed description including simulation results can be found in
[PFLDNeT2010].
In particular, this API extension is useful when using the CMT-SCTP,
CMT/RPv1-SCTP, CMT/RPv2-SCTP and MPTCP-like extensions (see
[I-D.tuexen-tsvwg-sctp-multipath], [Dre2012], [PAMS2012], [PAMS2011],
[ConTEL2011], [SoftCOM2011], [Globecom2010]) for Concurrent Multipath
Transfer (CMT) with SCTP.
1.1. Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
2. Sender Queue Info (SCTP_SQINFO)
This socket option obtains the maximum sender queue size (in bytes),
the current total sender queue utilization (in bytes) as well as the
current utilization per stream (in bytes).
The following structure is used to obtain the sender queue
information:
struct sctp_sndqueueinfo {
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