How to convert forward zone file to reverse Post: 302282347

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Top Forums Shell Programming and Scripting How to convert forward zone file to reverse Post 302282347 by quirkasaurus on Friday 30th of January 2009 03:50:34 PM

01-30-2009

Registered User

The output data doesn't look right to me because the
lines:

10.20.30.40
40 PTR subdomain1.domain.com
41 PTR subdomain4.domain.com
42 PTR subdomain5.domain.com

don't look like they imply that the last 40 is substituted by the first field in subsequent lines.

At any rate -- here's my ksh solution (late)

Code:

 
prev_key=some-junk
 
cat << EOF |
subdomain1 A 10.20.30.40
subdomain2 A 10.20.31.41
subdomain3 A 10.20.35.43
subdomain4 A 10.20.30.41
subdomain5 A 10.20.30.42
EOF
#----------------------------------------------------------------------#
# Convert spaces to dots.                                              #
#----------------------------------------------------------------------#
sed -e's/ /./g' |
#----------------------------------------------------------------------#
# Delimit on dots... reformat so that the key is in front...           #
#----------------------------------------------------------------------#
awk -F. '{
  printf( "%s.%s.%s %s %s\n", $3, $4, $5, $6, $1 );
  }' |
while read key subnet domain; do
 
  if [[ $key != $prev_key ]]; then
    print $key
    prev_key=$key
  fi
 
  print $subnet PTR $domain.domain.com
 
done

quirkasaurus

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LEARN ABOUT SUSE

mail::spf::mech::ptr

Mail::SPF::Mech::PTR(3) 				User Contributed Perl Documentation				   Mail::SPF::Mech::PTR(3)

NAME

       Mail::SPF::Mech::PTR - SPF record "ptr" mechanism class

DESCRIPTION

       An object of class Mail::SPF::Mech::PTR represents an SPF record mechanism of type "ptr".

   Constructors
       The following constructors are provided:

       new(%options): returns Mail::SPF::Mech::PTR
	   Creates a new SPF record "ptr" mechanism object.

	   %options is a list of key/value pairs representing any of the following options:

	   qualifier
	   domain_spec
	       See "new" in Mail::SPF::Mech.

       new_from_string($text, %options): returns Mail::SPF::Mech::PTR; throws Mail::SPF::ENothingToParse, Mail::SPF::EInvalidMech
	   Creates a new SPF record "ptr" mechanism object by parsing the string and any options given.

   Class methods
       The following class methods are provided:

       default_qualifier
       qualifier_pattern
	   See "Class methods" in Mail::SPF::Mech.

       name: returns string
	   Returns 'ptr'.

       name_pattern: returns Regexp
	   Returns a regular expression that matches a mechanism name of 'ptr'.

   Instance methods
       The following instance methods are provided:

       text
       qualifier
       params
       stringify
	   See "Instance methods" in Mail::SPF::Mech.

       domain_spec: returns Mail::SPF::MacroString
	   Returns the "domain-spec" parameter of the mechanism.

       match($server, $request): returns boolean
	   Checks whether the mechanism's target domain name, or a sub-domain thereof, is a "valid" domain name for the given request's IP address
	   (see "ip_address" in Mail::SPF::Request), and returns true if it does, or false otherwise.  See "valid_domain_for_ip_address" in
	   Mail::SPF::Util for how domains are validated.  See RFC 4408, 5.5, for the description of an equivalent algorithm.

SEE ALSO

       Mail::SPF, Mail::SPF::Record, Mail::SPF::Term, Mail::SPF::Mech

       <http://www.ietf.org/rfc/rfc4408.txt>

       For availability, support, and license information, see the README file included with Mail::SPF.

AUTHORS

       Julian Mehnle <julian@mehnle.net>, Shevek <cpan@anarres.org>

perl v5.12.1							    2010-07-05						   Mail::SPF::Mech::PTR(3)