1Net::DNS::Resolver::RecUusresre(C3o)ntributed Perl DocumNeentt:a:tDiNoSn::Resolver::Recurse(3)
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NAME

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

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

13       This module is a sub class of Net::DNS::Resolver. So the methods for
14       Net::DNS::Resolver still work for this module as well.  There are just
15       a couple methods added:
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17   hints
18       Initialize the hint servers.  Recursive queries need a starting name
19       server to work off of. This method takes a list of IP addresses to use
20       as the starting servers.  These name servers should be authoritative
21       for the root (.) zone.
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23         $res->hints(@ips);
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25       If no hints are passed, the default nameserver is asked for the hints.
26       Normally these IPs can be obtained from the following location:
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28         ftp://ftp.internic.net/domain/named.root
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30   recursion_callback
31       This method is takes a code reference, which is then invoked each time
32       a packet is received during the recursive lookup.  For example to
33       emulate dig's "+trace" function:
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35        $res->recursion_callback(sub {
36            my $packet = shift;
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38            $_->print for $packet->additional;
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40            printf(";; Received %d bytes from %s\n\n",
41                $packet->answersize,
42                $packet->answerfrom
43            );
44        });
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46   query_dorecursion
47       This method is much like the normal query() method except it disables
48       the recurse flag in the packet and explicitly performs the recursion.
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50         $packet = $res->query_dorecursion( "www.netscape.com.", "A");
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IPv6 transport

53       If the appropriate IPv6 libraries are installed the recursive resolver
54       will randomly choose between IPv6 and IPv4 addresses of the nameservers
55       it encounters during recursion.
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57       If you want to force IPv4 transport use the force_v4() method. Also see
58       the IPv6 transport notes in the Net::DNS::Resolver documentation.
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AUTHOR

61       Rob Brown, bbb@cpan.org
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SEE ALSO

64       Net::DNS::Resolver,
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67       Copyright (c) 2002, Rob Brown.  All rights reserved.  Portions
68       Copyright (c) 2005, Olaf M Kolkman.
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70       This module is free software; you can redistribute it and/or modify it
71       under the same terms as Perl itself.
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73       $Id: Recurse.pm 740 2008-12-17 23:20:53Z olaf $
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77perl v5.10.1                      2009-01-26    Net::DNS::Resolver::Recurse(3)
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