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sctp

★ 262 Open GitHub ↗

A Go implementation of SCTP

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<h1 align="center">
  <br>
  Pion SCTP
  <br>
</h1>
<h4 align="center">A Go implementation of SCTP</h4>
<p align="center">
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  <br>
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  <a href="https://pkg.go.dev/github.com/pion/sctp"><img src="https://pkg.go.dev/badge/github.com/pion/sctp.svg" alt="Go Reference"></a>
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</p>
<br>

### Implemented
- [RFC 6525](https://www.rfc-editor.org/rfc/rfc6525.html) — Stream Control Transmission Protocol (SCTP) Stream Reconfiguration
- [RFC 3758](https://www.rfc-editor.org/rfc/rfc3758.html) — Stream Control Transmission Protocol (SCTP) Partial Reliability Extension
- [RFC 5061](https://www.rfc-editor.org/rfc/rfc5061.html) — Stream Control Transmission Protocol (SCTP) Dynamic Address Reconfiguration
- [RFC 4895](https://www.rfc-editor.org/rfc/rfc4895.html) — Authenticated Chunks for the Stream Control Transmission Protocol (SCTP)
- [RFC 8260](https://www.rfc-editor.org/rfc/rfc8260.html) — Stream Schedulers and User Message Interleaving for the Stream Control Transmission Protocol (SCTP)
- [RFC 1982](https://www.rfc-editor.org/rfc/rfc1982.html) — Serial Number Arithmetic

### Non-RFC / Draft RFC Implemented
- [RACK (Tail Loss Probing)](https://duepublico2.uni-due.de/servlets/MCRFileNodeServlet/duepublico_derivate_00073893/Diss_Weinrank.pdf#page=97)
- [Adaptive Burst Mitigation](https://duepublico2.uni-due.de/servlets/MCRFileNodeServlet/duepublico_derivate_00073893/Diss_Weinrank.pdf#page=115)
- [SNAP](https://www.ietf.org/archive/id/draft-hancke-tsvwg-snap-00.html)

### Partial implementations
Pion only implements the subset of RFC 4960 that is required for WebRTC.

- [RFC 4960](https://www.rfc-editor.org/rfc/rfc4960.html) — Stream Control Transmission Protocol [Obsoleted by 9260, above]
- [RFC 2960](https://www.rfc-editor.org/rfc/rfc2960.html) — Stream Control Transmission Protocol [Obsoleted by 4960, above]

The update to [RFC 9260](https://www.rfc-editor.org/rfc/rfc9260) — Stream Control Transmission Protocol is currently a [work in progress](https://github.com/pion/sctp/issues/402).

### Potential future implementations
Ideally, we would like to add the following features as part of a [v2 refresh](https://github.com/pion/sctp/issues/314):

Feature | Reference | Progress
--- | --- | ---
Update to RFC 9260 | [Parent issue](https://github.com/pion/sctp/issues/402) | [In progress](https://github.com/pion/sctp/issues/402)
Blocking writes | [1](https://github.com/pion/sctp/issues/77), [2](https://github.com/pion/sctp/issues/357) | [Potentially in progress](https://github.com/pion/sctp/issues/357#issuecomment-3382050767)
association.listener (and better docs) | [1](https://github.com/pion/sctp/issues/74), [2](https://github.com/pion/sctp/issues/173) | Not started, [blocked by above](https://github.com/pion/sctp/issues/74#issuecomment-545550714)

RFCs of interest:
- [RFC 9438](https://datatracker.ietf.org/doc/rfc9438/) as it addresses the low utilization problem of [RFC 4960](https://www.rfc-editor.org/rfc/rfc4960.html) in fast long-distance networks as mentioned [here](https://github.com/pion/sctp/issues/218#issuecomment-3329690797).

### Roadmap
The library is used as a part of our WebRTC implementation. Please refer to that [roadmap](https://github.com/pion/webrtc/issues/9) to track our major milestones.

### Community
Pion has an active community on the [Discord](https://discord.gg/PngbdqpFbt).

Follow the [Pion Bluesky](https://bsky.app/profile/pion.ly) or [Pion Twitter](https://twitter.com/_pion) for project updates and important WebRTC news.

We are always looking to support **your projects**. Please reach out if you have something to build!
If you need commercial support or don't want to use public methods you can contact us at [team@pion.ly](mailto:team@pion.ly)

### Contributing
Check out the [contributing wiki](https://github.com/pion/webrtc/wiki/Contributing) to join the group of amazing people making this project possible

### License
MIT License - see [LICENSE](LICENSE) for full text

sctp

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