Network Working Group                                       T. Dreibholz
Internet-Draft                                                 SimulaMet
Intended status: Experimental                                   M. Becke
Expires: 21 March 2023                                       HAW Hamburg
                                                               H. Adhari
                                            University of Duisburg-Essen
                                                       17 September 2022


      SCTP Socket API Extensions for Concurrent Multipath Transfer
             draft-dreibholz-tsvwg-sctpsocket-multipath-25

Abstract

   This document describes extensions to the SCTP sockets API for
   configuring the CMT-SCTP and CMT/RP-SCTP extensions.

Status of This Memo

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

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   This Internet-Draft will expire on 21 March 2023.

Copyright Notice

   Copyright (c) 2022 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   provided without warranty as described in the Revised BSD License.




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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Concurrent Multipath Transfer and Resource Pooling Activation/
           Deactivation (SCTP_CMT_ON_OFF)  . . . . . . . . . . . . .   2
   3.  Testbed Platform  . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   3
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   This draft describes extensions to the SCTP sockets API (see [2],
   [1]) which allow an application to configure the behaviour of the
   Concurrent Multipath Transfer (CMT) extensions CMT-SCTP, CMT/
   RPv1-SCTP, CMT/RPv2-SCTP and MPTCP-like (see [3], [10], [5], [4],
   [7], [6], [8], [9], [11]).

2.  Concurrent Multipath Transfer and Resource Pooling Activation/
    Deactivation (SCTP_CMT_ON_OFF)

   This socket option activates or deactivates CMT and sets the
   corresponding Resource Pooling variant to be applied.  The
   sctp_assoc_value structure is used to specify the association for
   which the CMT state should be changed and the new CMT state.

   Definition of the sctp_assoc_value structure:

   struct sctp_assoc_value {
      sctp_assoc_t assoc_id;
      uint32_t     assoc_value;
   };

   assoc_id:  Holds the identifier for the association of which the CMT
      state should be changed.  Ignored for one-to-one style sockets.

   assoc_value:  0  Turns CMT off.

                 1  Turns plain CMT-SCTP on.  No Resource Pooling is
         applied.

                 2  Turns CMT-SCTP on.  CMT/RPv1 Resource Pooling as
         defined in [9] is applied.




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                 3  Turns CMT-SCTP on.  CMT/RPv2 Resource Pooling as
         defined in [8] is applied.

                 4  Turns CMT-SCTP on.  MPTCP-like Resource Pooling as
         defined in [6], [8], [5] is applied.

3.  Testbed Platform

   A large-scale and realistic Internet testbed platform with support
   for the multi-homing feature of the underlying SCTP protocol is
   NorNet.  A description of NorNet is provided in [12], [13], some
   further information can be found on the project website [14].

4.  Security Considerations

   Security considerations for the SCTP sockets API are described by
   [2].

5.  IANA Considerations

   This document does not require IANA actions.

6.  Acknowledgments

   The authors would like to thank Michael Tuexen for his support.

7.  References

7.1.  Normative References

   [1]        Stewart, R., Ed., "Stream Control Transmission Protocol",
              RFC 4960, DOI 10.17487/RFC4960, September 2007,
              <https://www.rfc-editor.org/info/rfc4960>.

   [2]        Stewart, R., Tuexen, M., Poon, K., Lei, P., and V.
              Yasevich, "Sockets API Extensions for the Stream Control
              Transmission Protocol (SCTP)", RFC 6458,
              DOI 10.17487/RFC6458, December 2011,
              <https://www.rfc-editor.org/info/rfc6458>.

   [3]        Amer, P. D., Becke, M., Dreibholz, T., Ekiz, N., Iyengar,
              J., Natarajan, P., Stewart, R. R., and M. Tuexen, "Load
              Sharing for the Stream Control Transmission Protocol
              (SCTP)", Work in Progress, Internet-Draft, draft-tuexen-
              tsvwg-sctp-multipath-23, 9 February 2022,
              <https://www.ietf.org/archive/id/draft-tuexen-tsvwg-sctp-
              multipath-23.txt>.




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7.2.  Informative References

   [4]        Dreibholz, T., "Evaluation and Optimisation of Multi-Path
              Transport using the Stream Control Transmission
              Protocol",  Habilitation Treatise, 13 March 2012,
              <https://duepublico.uni-duisburg-
              essen.de/servlets/DerivateServlet/Derivate-29737/
              Dre2012_final.pdf>.

   [5]        Dreibholz, T., Adhari, H., Becke, M., and E. P. Rathgeb,
              "Simulation and Experimental Evaluation of Multipath
              Congestion Control Strategies", Proceedings of the 2nd
              International Workshop on Protocols and Applications with
              Multi-Homing Support (PAMS) ISBN 978-0-7695-4652-0,
              DOI 10.1109/WAINA.2012.186, 29 March 2012,
              <https://www.wiwi.uni-due.de/fileadmin/fileupload/I-
              TDR/SCTP/Paper/PAMS2012.pdf>.

   [6]        Dreibholz, T., Becke, M., Adhari, H., and E. P. Rathgeb,
              "Evaluation of A New Multipath Congestion Control Scheme
              using the NetPerfMeter Tool-Chain", Proceedings of the
              19th IEEE International Conference on Software,
              Telecommunications and Computer Networks (SoftCOM) Pages
              1-6, ISBN 978-953-290-027-9, 16 September 2011,
              <https://www.wiwi.uni-due.de/fileadmin/fileupload/I-
              TDR/SCTP/Paper/SoftCOM2011.pdf>.

   [7]        Adhari, H., Dreibholz, T., Becke, M., Rathgeb, E. P., and
              M. Tüxen, "Evaluation of Concurrent Multipath Transfer
              over Dissimilar Paths", Proceedings of the 1st
              International Workshop on Protocols and Applications with
              Multi-Homing Support (PAMS) Pages 708-714,
              ISBN 978-0-7695-4338-3, DOI 10.1109/WAINA.2011.92, 22
              March 2011, <https://www.wiwi.uni-
              due.de/fileadmin/fileupload/I-TDR/SCTP/Paper/
              PAMS2011.pdf>.

   [8]        Dreibholz, T., Becke, M., Adhari, H., and E. P. Rathgeb,
              "On the Impact of Congestion Control for Concurrent
              Multipath Transfer on the Transport Layer", Proceedings of
              the 11th IEEE International Conference on
              Telecommunications (ConTEL) Pages 397-404,
              ISBN 978-953-184-152-8, 16 June 2011,
              <https://www.wiwi.uni-due.de/fileadmin/fileupload/I-
              TDR/SCTP/Paper/ConTEL2011.pdf>.






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   [9]        Dreibholz, T., Becke, M., Pulinthanath, J., and E. P.
              Rathgeb, "Applying TCP-Friendly Congestion Control to
              Concurrent Multipath Transfer", Proceedings of the 24th
              IEEE International Conference on Advanced Information
              Networking and Applications (AINA) Pages 312-319,
              ISBN 978-0-7695-4018-4, DOI 10.1109/AINA.2010.117, 21
              April 2010, <https://www.wiwi.uni-
              due.de/fileadmin/fileupload/I-TDR/SCTP/Paper/
              AINA2010.pdf>.

   [10]       Dreibholz, T., Becke, M., Rathgeb, E. P., and M. Tüxen,
              "On the Use of Concurrent Multipath Transfer over
              Asymmetric Paths", Proceedings of the IEEE Global
              Communications
              Conference (GLOBECOM) ISBN 978-1-4244-5637-6,
              DOI 10.1109/GLOCOM.2010.5683579, 7 December 2010,
              <https://www.wiwi.uni-due.de/fileadmin/fileupload/I-
              TDR/SCTP/Paper/Globecom2010.pdf>.

   [11]       Iyengar, J. R., Amer, P. D., and R. Stewart, "Concurrent
              Multipath Transfer Using SCTP Multihoming Over Independent
              End-to-End Paths", IEEE/ACM Transactions on
              Networking, Volume 14, Number 5, Pages 951-964,
              ISSN 1063-6692, DOI 10.1109/TNET.2006.882843, October
              2006,
              <http://www.fandm.edu/jiyengar/papers/cmt-ton2006.pdf>.

   [12]       Dreibholz, T. and E. G. Gran, "Design and Implementation
              of the NorNet Core Research Testbed for Multi-Homed
              Systems", Proceedings of the 3nd International Workshop on
              Protocols and Applications with Multi-Homing
              Support (PAMS) Pages 1094-1100, ISBN 978-0-7695-4952-1,
              DOI 10.1109/WAINA.2013.71, 27 March 2013,
              <https://www.simula.no/file/
              threfereedinproceedingsreference2012-12-207643198512pdf/
              download>.

   [13]       Gran, E. G., Dreibholz, T., and A. Kvalbein, "NorNet Core
              – A Multi-Homed Research Testbed", Computer Networks,
              Special Issue on Future Internet Testbeds Volume 61, Pages
              75-87, ISSN 1389-1286, DOI 10.1016/j.bjp.2013.12.035, 14
              March 2014,
              <https://www.simula.no/file/simulasimula2236pdf/download>.

   [14]       Dreibholz, T., "NorNet – A Real-World, Large-Scale Multi-
              Homing Testbed", 2022, <https://www.nntb.no/>.





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Authors' Addresses

   Thomas Dreibholz
   Simula Metropolitan Centre for Digital Engineering
   Pilestredet 52
   0167 Oslo
   Norway
   Email: dreibh@simula.no
   URI:   https://www.simula.no/people/dreibh


   Martin Becke
   HAW Hamburg, Informatics Department
   Berliner Tor 7
   20099 Hamburg
   Germany
   Phone: +49-40-42875-8104
   Email: martin.becke@haw-hamburg.de
   URI:   http://www.scimbe.de/about.html


   Hakim Adhari
   University of Duisburg-Essen, Institute for Experimental Mathematics
   Ellernstraße 29
   45326 Essen
   Germany
   Email: hakim.adhari@uni-due.de
























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