]> SCTP Socket API Extensions for Concurrent Multipath Transfer Simula Metropolitan Centre for Digital Engineering
Stensberggata 27 0170 Oslo Norway dreibh@simula.no https://www.simula.no/people/dreibh
HAW Hamburg, Informatics Department
Berliner Tor 7 20099 Hamburg Germany +49-40-42875-8104 martin.becke@haw-hamburg.de http://www.scimbe.de/about.html
University of Duisburg-Essen, Institute for Experimental Mathematics
Ellernstraße 29 45326 Essen Germany hakim.adhari@uni-due.de
Internet-Draft This document describes extensions to the SCTP sockets API for configuring the CMT-SCTP and CMT/RP-SCTP extensions.
Introduction This document describes extensions to the SCTP sockets API (see , ) that allow an application to configure the behavior of the Concurrent Multipath Transfer (CMT) extensions CMT-SCTP, CMT/RPv1-SCTP, CMT/RPv2-SCTP, and MPTCP-like (see , , , , , , , , ).
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:
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 is applied.
3
Turns CMT-SCTP on. CMT/RPv2 Resource Pooling as defined in is applied.
4
Turns CMT-SCTP on. MPTCP-like Resource Pooling as defined in , , and is applied.
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 and . Further information can be found on the project website .
Security Considerations Security considerations for the SCTP sockets API are described in .
IANA Considerations This document does not require IANA actions.
Acknowledgments The authors would like to thank Michael Tüxen for his support.
Normative References Informative References Evaluation and Optimisation of Multi-Path Transport using the Stream Control Transmission Protocol Simulation and Experimental Evaluation of Multipath Congestion Control Strategies Evaluation of A New Multipath Congestion Control Scheme using the NetPerfMeter Tool-Chain Evaluation of Concurrent Multipath Transfer over Dissimilar Paths On the Impact of Congestion Control for Concurrent Multipath Transfer on the Transport Layer Applying TCP-Friendly Congestion Control to Concurrent Multipath Transfer On the Use of Concurrent Multipath Transfer over Asymmetric Paths Concurrent Multipath Transfer Using SCTP Multihoming Over Independent End-to-End Paths Design and Implementation of the NorNet Core Research Testbed for Multi-Homed Systems NorNet Core – A Multi-Homed Research Testbed NorNet – A Real-World, Large-Scale Multi-Homing Testbed