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Re: non-TXT RR: reuse MB/MD/MF/MG/MR?

2004-06-10 14:19:19

In 
<Pine(_dot_)LNX(_dot_)4(_dot_)44(_dot_)0406101302580(_dot_)17376-100000(_at_)sokol(_dot_)elan(_dot_)net>
 "william(at)elan.net" <william(_at_)elan(_dot_)net> writes:

Actually for most dns software they are not supported and treated just like
unknown record type. So we can reuse them but i'll be harder to push 
through IETF and on implementation its same as unknown type.

Hmmm...

(root(_at_)backbone) # grep "^mr" master.midwestcs.com
mr              MR      v=spf1\ -all\ x=.
(root(_at_)backbone) # dig mr.midwestcs.com mr +short
v=spf1\032-all\032x=.
(root(_at_)backbone) #

In my initial testing, I overlooked the fact that bind9 (at least)
expects the NEWNAME to be a domain name.  This means that there must
be a dot every 63 characters and end in a dot.  Since well over 50% of
all SPF records are less than 63 characters, most SPF records have
plenty of dots anyway, and you can add dummy modifiers if you really
need to, this shouldn't be too much of a problem.

Again, this is *ugly*, but *may* work and future releases of DNS
software can make this slightly less ugly.



-wayne


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