Re: [sitefinder-tech-discuss] Pseudo code please

[Kee Hinckley <nazgul@somewhere.com>]

At 12:47 PM -0400 10/16/03, Andrew Newton wrote:
> From a Python script of mine:
>
> import dns.message
> import dns.query
>
> ....
>
> def testdomain( domain, hdr ):
>   query = dns.message.make_query( domain, dns.rdatatype.NS )
>   message = dns.query.tcp( query, '192.5.6.30' )
>   if len( message.answer ) == 0:
>     markInvalid( hdr )
>   return

That's not pseudo-code, and it doesn't specifically answer any 
question except #2.  So I'll try and do a little experimentation and 
guess what you are saying here.  (What the hell, after all you're 
going to reimburse me for the work, right?)

I think you're saying that prior to doing any A or MX query, I should 
first take the host name and reduce it to just the domain name.  Then 
I should do an NS query on the domain.  If the results are empty, 
then I know it's a wildcard.  If there is a result, then I can trust 
the results of any subsequent queries on the host/domain name to be 
accurate.

Is that correct?

> Kee Hinckley wrote:
> > I'd like to see some pseudo code.
> >
> > 1. Given a host name in .com/.net, determine whether the host really exists.
> > 2. Given a domain name in .com/.net, determine whether the domain 
> > really exists, or whether it has been configured to *look* like a 
> > Verisign wildcard domain.
> > 3. Given a host/domain, determine whether one should be able to 
> > send mail to it.


--
Kee Hinckley
http://www.messagefire.com/         Next Generation Spam Defense
http://commons.somewhere.com/buzz/  Writings on Technology and Society

I'm not sure which upsets me more: that people are so unwilling to accept
responsibility for their own actions, or that they are so eager to regulate
everyone else's.

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