Net::DNS::Resolver::Recurse(3)             User Contributed Perl Documentation


NAME
       Net::DNS::Resolver::Recurse - DNS recursive resolver

SYNOPSIS
           use Net::DNS::Resolver::Recurse;

           my $resolver = new Net::DNS::Resolver::Recurse();

           $resolver->hints('198.41.0.4');     # A.ROOT-SERVER.NET.

           my $packet = $resolver->send( 'www.rob.com.au.', 'A' );

DESCRIPTION
       This module resolves queries by following the delegation path from the
       DNS root.

METHODS
       This module inherits almost all the methods from Net::DNS::Resolver.
       Additional module-specific methods are described below.

   hints
       This method specifies a list of the IP addresses of nameservers to be
       used to discover the addresses of the root nameservers.

           $resolver->hints(@ip);

       If no hints are passed, the priming query is directed to nameservers
       drawn from a built-in list of IP addresses.

   query, search, send
       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
       query packets and recursive name resolution is performed explicitly.

       The query() and search() methods are inherited from Net::DNS::Resolver
       and invoke send() indirectly.

   callback
       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:

           my $coderef = sub {
               my $packet = shift;

               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.

ACKNOWLEDGEMENT
       This package is an improved and compatible reimplementation of the
       Net::DNS::Resolver::Recurse.pm created by Rob Brown in 2002, whose
       contribution is gratefully acknowledged.

COPYRIGHT
       Copyright (c)2014,2019 Dick Franks.

       Portions Copyright (c)2002 Rob Brown.

       All rights reserved.

LICENSE
       Permission to use, copy, modify, and distribute this software and its
       documentation for any purpose and without fee is hereby granted,
       provided that the original copyright notices appear in all copies and
       that both copyright notice and this permission notice appear in
       supporting documentation, and that the name of the author not be used
       in advertising or publicity pertaining to distribution of the software
       without specific prior written permission.

       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
       OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
       IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
       TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

SEE ALSO
       Net::DNS::Resolver

perl v5.40.0                      2024-12-15    Net::DNS::Resolver::Recurse(3)