how to use the ktls

Hi,

Now that I've completed NFSv4.2 I'm on to the next project, which is making NFS
work over TLS.
Of course, I know absolutely nothing about TLS, which will make this an interesting
exercise for me.
I did find simple server code in the OpenSSL doc. which at least gives me a starting
point for the initialization stuff.
As I understand it, this initialization must be done in userspace?

Then somehow, the ktls takes over and does the encryption of the
data being sent on the socket via sosend_generic(). Does that sound right?

So, how does the kernel know the stuff that the initialization phase (handshake)
figures out, or is it magic I don't have to worry about?

Don't waste much time replying to this. A few quick hints will keep me going for
now. (From what I've seen sofar, this TLS stuff isn't simple. And I thought Kerberos
was a pain.;-)

Thanks in advance for any hints, rick