This document collects some ideas for a next generation of the
Stream Control Transmission Protocol (SCTP) for further discussion.
It is a result of lessons learned from more than one decade of SCTP
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The Stream Control Transmission Protocol (SCTP) has been defined as RFCs in
There is also a detailed introduction provided by  as well as lots of further information material on . SCTP is therefore not introduced in more detail here.¶
The scope of this document is to collect some ideas of what to update/change for a next generation of the SCTP protocol. It is a result of lessons learned from more than one decade of SCTP deployment (see also ) as well as ongoing discussions on applying SCTP for WebRTC Data Channels (as introduced in more detail in ).¶
Concurrent Multi-Path Transfer for SCTP (CMT-SCTP) ()¶
Chunk Authentication provides integrity but not confidentiality. There could be a feature for encryption as well, for example like . Having encryption directly included inside the core transport protocol may make it easier to use (less error-prone work for application developers).¶
SCTP assigns a fixed TSN per DATA chunk. The TSN cannot be changed any more. That is, it is not possible for a middlebox to split chunks into smaller pieces (for example, for hardware offloading). For further discussion: may it be useful to consider a different behavior?¶
Definition of path:
For SCTP, a path is defined by a remote destination address. ,  shows that CMT-SCTP performance also depends on the local endpoint's outgoing links. Considering each pair of local outgoing and remote incoming address as different path may lead to improved performance in many Internet scenarios.¶
An Open Source simulation model for SCTP is available for OMNeT++ within the INET Framework. See  for the Git repository. For documentation on the model, see  and . This model can be used to evaluate future ideas for SCTP.¶
NorNet is a large-scale and realistic Internet testbed platform with support for multi-homing. A description of and introduction to NorNet is provided in , , , . Further information can be found on the project website  at https://www.nntb.no.¶
Tuexen, M., Xie, Q., Stewart, R., Shore, M., Ong, L., Loughney, J., and M. Stillman, "Requirements for Reliable Server Pooling", RFC 3237, DOI 10.17487/RFC3237, , <https://www.rfc-editor.org/info/rfc3237>.
Bellovin, S., Ioannidis, J., Keromytis, A., and R. Stewart, "On the Use of Stream Control Transmission Protocol (SCTP) with IPsec", RFC 3554, DOI 10.17487/RFC3554, , <https://www.rfc-editor.org/info/rfc3554>.
Stewart, R., Ramalho, M., Xie, Q., Tuexen, M., and P. Conrad, "Stream Control Transmission Protocol (SCTP) Partial Reliability Extension", RFC 3758, DOI 10.17487/RFC3758, , <https://www.rfc-editor.org/info/rfc3758>.
Tuexen, M., Stewart, R., and P. Lei, "Padding Chunk and Parameter for the Stream Control Transmission Protocol (SCTP)", RFC 4820, DOI 10.17487/RFC4820, , <https://www.rfc-editor.org/info/rfc4820>.
Tuexen, M., Stewart, R., Lei, P., and E. Rescorla, "Authenticated Chunks for the Stream Control Transmission Protocol (SCTP)", RFC 4895, DOI 10.17487/RFC4895, , <https://www.rfc-editor.org/info/rfc4895>.
Stewart, R., Xie, Q., Tuexen, M., Maruyama, S., and M. Kozuka, "Stream Control Transmission Protocol (SCTP) Dynamic Address Reconfiguration", RFC 5061, DOI 10.17487/RFC5061, , <https://www.rfc-editor.org/info/rfc5061>.
Stillman, M., Ed., Gopal, R., Guttman, E., Sengodan, S., and M. Holdrege, "Threats Introduced by Reliable Server Pooling (RSerPool) and Requirements for Security in Response to Threats", RFC 5355, DOI 10.17487/RFC5355, , <https://www.rfc-editor.org/info/rfc5355>.
Tuexen, M., Seggelmann, R., and E. Rescorla, "Datagram Transport Layer Security (DTLS) for Stream Control Transmission Protocol (SCTP)", RFC 6083, DOI 10.17487/RFC6083, , <https://www.rfc-editor.org/info/rfc6083>.
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, , <https://www.rfc-editor.org/info/rfc6458>.
Tuexen, M. and R. Stewart, "UDP Encapsulation of Stream Control Transmission Protocol (SCTP) Packets for End-Host to End-Host Communication", RFC 6951, DOI 10.17487/RFC6951, , <https://www.rfc-editor.org/info/rfc6951>.
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, , <https://www.simula.no/file/simulasimula2236pdf/download>.