[gnutls-help] DTLS and gnutls_bye

[Nikos Mavrogiannopoulos]

On Mon, Feb 13, 2017 at 10:28 PM, Sean Greenslade
<sean at seangreenslade.com> wrote:
> Hello, all. I've been writing a small server-client application that's
> using GnuTLS's DTLS functionality. I must admit I'm not super familiar
> with TLS in general, and it seems that DTLS is not used very often, so I
> can't find too many examples of its use online.
>
> My question is this: is gnutls_bye intended to be used with DTLS
> "connections"? I realize that there isn't a proper connection in UDP,
> but it seems like it would be useful to inform the other end of a
> connection that there will be no further communications in this TLS
> session.
>
> Specifically, the behavior I'm seeing is this. gnutls_bye does send the
> close alert message over the wire, however the receiving end does not
> raise an alert error when checking for received packets.

What does the other side receive?

regards,
Nikos