Net::DNS::Resolver::Recurse

NAME

Net::DNS::Resolver::Recurse - Perform recursive dns lookups

SYNOPSIS

  use Net::DNS::Resolver::Recurse;
  my $res = Net::DNS::Resolver::Recurse->new;

DESCRIPTION

This module is a sub class of Net::DNS::Resolver. So the methods for Net::DNS::Resolver still work for this module as well. There are just a couple methods added:

hints

Initialize the hint servers. Recursive queries need a starting name server to work off of. This method takes a list of IP addresses to use as the starting servers. These name servers should be authoritative for the root (.) zone.

  $res->hints(@ips);

If no hints are passed, the default nameserver is asked for the hints. Normally these IPs can be obtained from the following location:

  ftp://ftp.internic.net/domain/named.root

recursion_callback

This method is takes a code reference, which is then invoked each time a packet is received during the recursive lookup. For example to emulate dig's "+trace" function:

 $res->recursion_callback(sub {
     my $packet = shift;

     $_->print for $packet->additional;

     printf(";; Received %d bytes from %s\n\n", 
         $packet->answersize, 
         $packet->answerfrom
     );
 });

query_dorecursion

This method is much like the normal query() method except it disables the recurse flag in the packet and explicitly performs the recursion.

  $packet = $res->query_dorecursion( "www.netscape.com.", "A");

AUTHOR

Rob Brown, bbb@cpan.org

COPYRIGHT

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

$Id: Recurse.pm 102 2004-08-12 05:16:06Z ctriv $