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Sender Queue Info Option for the SCTP Socket API
draft-dreibholz-tsvwg-sctpsocket-sqinfo-08

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Last updated: 2014-07-04
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Network Working Group                                       T. Dreibholz
Internet-Draft                                Simula Research Laboratory
Intended status: Experimental                              R. Seggelmann
Expires: January 5, 2015                 Muenster Univ. of App. Sciences
                                                                M. Becke
                                            University of Duisburg-Essen
                                                           July 04, 2014

            Sender Queue Info Option for the SCTP Socket API
             draft-dreibholz-tsvwg-sctpsocket-sqinfo-08.txt

Abstract

   This document describes an extension to the SCTP sockets API for
   querying information about the sender queue.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on January 5, 2015.

Copyright Notice

   Copyright (c) 2014 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Sender Queue Info (SCTP_SQINFO) . . . . . . . . . . . . . . .   2
   3.  Testbed Platform  . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   4
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

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:

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   struct sctp_sndqueueinfo {

[include full document text]