What RFCs are supported by FreeBSD

[nkritsky at internethelp.ru (Nickolay A. Kritsky)]

  Hello, my fellow hackers.

Does anybody know, which RFCs are followed by FreeBSD's core network
drivers (like IP,TCP,routing,UDP,ICMP drivers)?

I have tried
find /usr/src/sys/ -name *.c -or -name '*.h' -exec grep -l -i rfc {} \;|tee rfcs.kern
and
sysctl -a |grep -i rfc

It gave me some info, but I still wonder, is there more reliable method?

Please cc me in your reply because I am not subscibed to this list
(yet ;) ).
Thanks for any help.
;-------------------------------------------
; NKritsky
; mailto:nkritsky_(_at_)_internethelp_(_dot_)_ru