[riot-notifications] [RIOT-OS/RIOT] pkg/tinydtls: handling of close_notify (#16422)

Achim Kraus notifications at github.com
Tue Jul 6 18:27:06 CEST 2021

> To be honest, I consider 4.2.8 as a MUST and not a SHOULD for a DTLS stack, 

:-) :-) :-) I always read MUST, I overseen the SHOULD ... :-) :-) :-)

> This workaround should never stay forever, it's only supposed to be a temporary solution for clients, so they don't become unusable over time if the close_notify is not ACK-ed.

Yes, agreed. But even with a working "close_notify", everyone must be aware, that dtls-server, which don't implement 4.2.8 are always a bad choice. Assuming NATs, your "ip-endpoint" may have even been used by a other peer without close before.

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