Re: [Taps] Hello from CoRE

[Christian Amsüss <[e-mail]>]

Hello Chris,

On Mon, Mar 26, 2018 at 06:33:25AM -0700, Chris Wood wrote:
> > * On the topic of DTLS protected connections: [...] so that I can
> > issue a retransmit at a later time using the same DTLS sequence
> > number?
> 
> No. Such details are hidden beneath the API. Retransmission, for
> example, would be something you specify on a per-message basis.

Would that mean that I can tell it to send this particular message with,
say, "retransmissit roughly after 2s, exponentialy fallin off with
factor 2 for up to 4 transmissions", and can call off retransmission of
that message when I've decoded a CoAP ACK?

For that would work just as well.

I'd only need to be informed whether the implementation retransmits with
the same or a DTLS new sequence number, and whether such a retransmit
actually happened. (The feedback to the application about the
retransmits is not only relevant to the encrypted case, but also to tune
the retransmission for applications as [1]).

Thanks
Christian

[1]: https://tools.ietf.org/html/draft-ietf-core-cocoa-03

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