Net::DNS::Resolver::Recurse - Perform recursive DNS lookups
use Net::DNS::Resolver::Recurse; $resolver = new Net::DNS::Resolver::Recurse(); $packet = $resolver->query ( 'www.example.com', 'A' ); $packet = $resolver->search( 'www.example.com', 'A' ); $packet = $resolver->send ( 'www.example.com', 'A' );
This module is a subclass of Net::DNS::Resolver.
This module inherits almost all the methods from Net::DNS::Resolver. Additional module-specific methods are described below.
This method specifies a list of the IP addresses used to locate the authoritative name servers for the root (.) zone.
$resolver->hints(@ip);
If no hints are passed, the default nameserver is used to discover the addresses of the root nameservers.
If the default nameserver not been configured correctly, or at all, a built-in list of IP addresses is used.
The query(), search() and send() methods produce the same result as their counterparts in Net::DNS::Resolver.
$packet = $resolver->send( 'www.example.com.', 'A' );
Server-side recursion is suppressed by clearing the recurse flag in the packet and recursive name resolution is performed explicitly.
The query() and search() methods are inherited from Net::DNS::Resolver and invoke send() indirectly.
This method specifies a code reference to a subroutine, which is then invoked at each stage of the recursive lookup.
For example to emulate dig's +trace function:
+trace
my $coderef = sub { my $packet = shift; $_->print for $packet->additional; printf ";; Received %d bytes from %s\n\n", $packet->answersize, $packet->answerfrom; }; $resolver->callback($coderef);
The callback subroutine is not called for queries for missing glue records.
This package is an improved and compatible reimplementation of the Net::DNS::Resolver::Recurse.pm created by Rob Brown in 2002.
The contribution of Rob Brown is gratefully acknowledged.
Copyright (c)2014 Dick Franks
Portions Copyright (c)2002 Rob Brown
All rights reserved.
This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
Net::DNS::Resolver
To install Net::DNS, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Net::DNS
CPAN shell
perl -MCPAN -e shell install Net::DNS
For more information on module installation, please visit the detailed CPAN module installation guide.