Diagram of SSH Protocol Flow for OpenSSH sessions



I'm looking for a good state diagram (text or graphic) for an SSH2
session. Is Girish's diagram below complete and up to date?

http://www.linuxjournal.com/files/linuxjournal.com/linuxjournal/articles/095/9566/9566f2.jpg

It is Figure 2 from "The OpenSSH Protocol under the hood"
http://www.linuxjournal.com/article/9566

Regards,
/Lars