Network Working Group T. Dreibholz Internet-Draft M. Becke Intended status: Experimental University of Duisburg-Essen Expires: May 12, 2011 November 8, 2010 SCTP Socket API Extensions for Concurrent Multipath Transfer draft-dreibholz-tsvwg-sctpsocket-multipath-00.txt 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. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on May 12, 2011. Copyright Notice Copyright (c) 2010 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. Dreibholz & Becke Expires May 12, 2011 [Page 1] Internet-Draft SCTP Socket API Extensions November 2010 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Concurrent Multipath Transfer Activation/Deactivation (SCTP_CMT_ON_OFF) . . . . . . . . . . . . . . . . . . . . . . . 3 3. Resource Pooling Activation/Deactivation (SCTP_RP_ON_OFF) . . . 3 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 4 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.1. Normative References . . . . . . . . . . . . . . . . . . . 4 7.2. Informative References . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5 Dreibholz & Becke Expires May 12, 2011 [Page 2] Internet-Draft SCTP Socket API Extensions November 2010 1. Introduction This draft describes extensions to the SCTP sockets API (see [I-D.ietf-tsvwg-sctpsocket], [RFC4960]) which allow an application to configure the behaviour of the Concurrent Multipath Transfer (CMT) extensions CMT-SCTP and CMT/RP-SCTP (see [I-D.tuexen-tsvwg-sctp-multipath], [Globecom2010], [AINA2010], [IAS2006]). 2. Concurrent Multipath Transfer Activation/Deactivation (SCTP_CMT_ON_OFF) This socket option activates or deactivates CMT. 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 CMT on. 3. Resource Pooling Activation/Deactivation (SCTP_RP_ON_OFF) This socket option activates or deactivates Resource Pooling (RP) when using CMT. The sctp_assoc_value structure is used to specify the association for which the RP state should be changed and the new RP state. Note, that CMT usage itself has to be turned on separately by using the SCTP_CMT_ON_OFF option. Definition of the sctp_assoc_value structure: struct sctp_assoc_value { sctp_assoc_t assoc_id; uint32_t assoc_value; }; Dreibholz & Becke Expires May 12, 2011 [Page 3] Internet-Draft SCTP Socket API Extensions November 2010 assoc_id: Holds the identifier for the association of which the RP state should be changed. Ignored for one-to-one style sockets. assoc_value: 0 Turns RP off. 1 Turns RP on. 4. Security Considerations Security considerations for the SCTP sockets API are described by [I-D.ietf-tsvwg-sctpsocket]. 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 [RFC4960] Stewart, R., "Stream Control Transmission Protocol", RFC 4960, September 2007. [I-D.ietf-tsvwg-sctpsocket] Stewart, R., Poon, K., Tuexen, M., Yasevich, V., and P. Lei, "Sockets API Extensions for Stream Control Transmission Protocol (SCTP)", draft-ietf-tsvwg-sctpsocket-24 (work in progress), October 2010. [I-D.tuexen-tsvwg-sctp-multipath] Becke, M., Dreibholz, T., Iyengar, J., Natarajan, P., and M. Tuexen, "Load Sharing for the Stream Control Transmission Protocol (SCTP)", draft-tuexen-tsvwg-sctp-multipath-00 (work in progress), July 2010. Dreibholz & Becke Expires May 12, 2011 [Page 4] Internet-Draft SCTP Socket API Extensions November 2010 7.2. Informative References [Globecom2010] Dreibholz, T., Becke, M., Rathgeb, E., and M. Tuexen, "On the Use of Concurrent Multipath Transfer over Asymmetric Paths", Proceedings of the IEEE Global Communications Conference (GLOBECOM), December 2010. [AINA2010] Dreibholz, T., Becke, M., Pulinthanath, J., and E. Rathgeb, "Applying TCP-Friendly Congestion Control to Concurrent Multipath Transfer", Proceedings of the IEEE 24th International Conference on Advanced Information Networking and Applications (AINA), April 2010. [IAS2006] Iyengar, J., Amer, P., and R. Stewart, "Concurrent Multipath Transfer Using SCTP Multihoming Over Independent End-to-End Paths", Journal IEEE/ACM Transactions on Networking, October 2006. Authors' Addresses Thomas Dreibholz University of Duisburg-Essen, Institute for Experimental Mathematics Ellernstrasse 29 45326 Essen, Nordrhein-Westfalen Germany Phone: +49-201-1837637 Fax: +49-201-1837673 Email: dreibh@iem.uni-due.de URI: http://www.iem.uni-due.de/~dreibh/ Martin Becke University of Duisburg-Essen, Institute for Experimental Mathematics Ellernstrasse 29 45326 Essen, Nordrhein-Westfalen Germany Phone: +49-201-183-7667 Fax: +49-201-183-7673 Email: martin.becke@uni-due.de Dreibholz & Becke Expires May 12, 2011 [Page 5]