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75 lines
1.8 KiB
Perl
75 lines
1.8 KiB
Perl
#!/usr/bin/env perl
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#
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# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#
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# See the COPYRIGHT file distributed with this work for additional
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# information regarding copyright ownership.
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use strict;
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use warnings;
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use IO::File;
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use Getopt::Long;
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use Net::DNS::Nameserver;
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my $pidf = new IO::File "ans.pid", "w" or die "cannot open pid file: $!";
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print $pidf "$$\n" or die "cannot write pid file: $!";
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$pidf->close or die "cannot close pid file: $!";
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sub rmpid { unlink "ans.pid"; exit 1; };
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$SIG{INT} = \&rmpid;
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$SIG{TERM} = \&rmpid;
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my $count = 0;
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my $localaddr = "10.53.0.7";
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my $localport = int($ENV{'PORT'});
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if (!$localport) { $localport = 5300; }
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my $verbose = 0;
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sub reply_handler {
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my ($qname, $qclass, $qtype, $peerhost, $query, $conn) = @_;
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my ($rcode, @ans, @auth, @add);
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print ("request: $qname/$qtype\n");
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STDOUT->flush();
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$count += 1;
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if ($qname eq "count" ) {
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if ($qtype eq "TXT") {
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my ($ttl, $rdata) = (0, "$count");
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my $rr = new Net::DNS::RR("$qname $ttl $qclass $qtype $rdata");
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push @ans, $rr;
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print ("\tcount: $count\n");
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}
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$rcode = "NOERROR";
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} elsif ($qname eq "reset") {
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$count = 0;
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$rcode = "NOERROR";
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} else {
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$rcode = "REFUSED";
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}
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# mark the answer as authoritative (by setting the 'aa' flag
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return ($rcode, \@ans, \@auth, \@add, { aa => 1 });
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}
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GetOptions(
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'port=i' => \$localport,
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'verbose!' => \$verbose,
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);
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my $ns = Net::DNS::Nameserver->new(
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LocalAddr => $localaddr,
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LocalPort => $localport,
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ReplyHandler => \&reply_handler,
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Verbose => $verbose,
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);
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$ns->main_loop;
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