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[tsvwg] DTLS for SCTP: DTLS Chunk kernel part testing

Magnus Westerlund <magnus.westerlund@ericsson.com> Sun, 17 March 2024 23:04 UTC

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From: Magnus Westerlund <magnus.westerlund@ericsson.com>
To: tsvwg IETF list <tsvwg@ietf.org>
Thread-Topic: DTLS for SCTP: DTLS Chunk kernel part testing
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Date: Sun, 17 Mar 2024 23:04:09 +0000
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Subject: [tsvwg] DTLS for SCTP: DTLS Chunk kernel part testing
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Hi,

In the design team we have discussion around barriers to implement DTLS Chunk (https://datatracker.ietf.org/doc/draft-westerlund-tsvwg-sctp-dtls-chunk/) as part of SCTP stacks that are in open source OS kernels. The discussion in the design team indicated that they could implement and release the functionality described in the above draft. What was raised as an issue was the testing of this code using the API that would exist to the upper layer implementation that would implement the DTLS handshakes and rekeying per: https://datatracker.ietf.org/doc/draft-westerlund-tsvwg-sctp-dtls-handshake/.

Is there any reason why one cannot actually write code to test this API without implementing almost any of draft-westerlund-tsvwg-sctp-dtls-handshake? I would think the goal of the kernel parts is to show that the lower layer and its API works and can be used by a higher layer application on top of the SCTP stack. In a test application one could use hard coded keys and have multiple sets  to test rekeying and not run DTLS handshakes at all between the endpoints.

Cheers

Magnus

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