72 lines
1.2 KiB
Perl
72 lines
1.2 KiB
Perl
#!/usr/bin/perl
|
|
# $Id: perldig 1815 2020-10-14 21:55:18Z willem $
|
|
|
|
=head1 NAME
|
|
|
|
perldig - Perl script to perform DNS queries
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
C<perldig> [ C<@>I<nameserver> ] I<name> [ I<type> [ I<class> ] ]
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
Performs a DNS query on the given name. The record type
|
|
and class can also be specified; if left blank they default
|
|
to A and IN.
|
|
|
|
=head1 AUTHOR
|
|
|
|
Michael Fuhr <mike@fuhr.org>
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<perl(1)>, L<axfr>, L<check_soa>, L<check_zone>, L<mresolv>, L<mx>,
|
|
L<Net::DNS>
|
|
|
|
=cut
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use File::Basename;
|
|
use Net::DNS;
|
|
|
|
my $res = Net::DNS::Resolver->new;
|
|
|
|
if (@ARGV && ($ARGV[0] =~ /^@/)) {
|
|
my $nameserver = shift;
|
|
$nameserver =~ s/^@//;
|
|
$res->nameservers($nameserver);
|
|
}
|
|
|
|
die "Usage: ", basename($0), " [ \@nameserver ] name [ type [ class ] ]\n"
|
|
unless (@ARGV >= 1) && (@ARGV <= 3);
|
|
|
|
my ($name, $type, $class) = @ARGV;
|
|
$type ||= "A";
|
|
$class ||= "IN";
|
|
|
|
if (uc($type) eq "AXFR") {
|
|
|
|
my @rrs = $res->axfr($name, $class);
|
|
|
|
if (@rrs) {
|
|
foreach my $rr (@rrs) {
|
|
$rr->print;
|
|
}
|
|
} else {
|
|
die "zone transfer failed: ", $res->errorstring, "\n";
|
|
}
|
|
|
|
} else {
|
|
|
|
my $answer = $res->send($name, $type, $class);
|
|
|
|
if ($answer) {
|
|
$answer->print;
|
|
} else {
|
|
die "query failed: ", $res->errorstring, "\n";
|
|
}
|
|
}
|