[PATCH RFC 4/5] net/tls: Add support for PF_TLSH (a TLS handshake listener)

[Jakub Kicinski]

On Thu, 28 Apr 2022 09:26:41 +0200 Hannes Reinecke wrote:
> The whole thing started off with the problem on _how_ sockets could be 
> passed between kernel and userspace and vice versa.
> While there is fd passing between processes via AF_UNIX, there is no 
> such mechanism between kernel and userspace.

Noob question - the kernel <> user space FD sharing is just 
not implemented yet, or somehow fundamentally hard because kernel 
fds are "special"?