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-rw-r--r--bin/tests/system/resolver/ans3/ans.pl191
1 files changed, 191 insertions, 0 deletions
diff --git a/bin/tests/system/resolver/ans3/ans.pl b/bin/tests/system/resolver/ans3/ans.pl
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+++ b/bin/tests/system/resolver/ans3/ans.pl
@@ -0,0 +1,191 @@
+#!/usr/bin/perl
+
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# SPDX-License-Identifier: MPL-2.0
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+#
+# Ad hoc name server
+#
+
+use IO::File;
+use IO::Socket;
+use Net::DNS;
+use Net::DNS::Packet;
+
+# Ignore SIGPIPE so we won't fail if peer closes a TCP socket early
+local $SIG{PIPE} = 'IGNORE';
+
+# Flush logged output after every line
+local $| = 1;
+
+my $localport = int($ENV{'PORT'});
+if (!$localport) { $localport = 5300; }
+
+my $server_addr = "10.53.0.3";
+
+my $udpsock = IO::Socket::INET->new(LocalAddr => "$server_addr",
+ LocalPort => $localport, Proto => "udp", Reuse => 1) or die "$!";
+my $tcpsock = IO::Socket::INET->new(LocalAddr => "$server_addr",
+ LocalPort => $localport, Proto => "tcp", Listen => 5, Reuse => 1) or die "$!";
+
+my $pidf = new IO::File "ans.pid", "w" or die "cannot open pid file: $!";
+print $pidf "$$\n" or die "cannot write pid file: $!";
+$pidf->close or die "cannot close pid file: $!";
+sub rmpid { unlink "ans.pid"; exit 1; };
+
+$SIG{INT} = \&rmpid;
+$SIG{TERM} = \&rmpid;
+
+sub handleQuery {
+ my $buf = shift;
+ my $packet;
+
+ if ($Net::DNS::VERSION > 0.68) {
+ $packet = new Net::DNS::Packet(\$buf, 0);
+ $@ and die $@;
+ } else {
+ my $err;
+ ($packet, $err) = new Net::DNS::Packet(\$buf, 0);
+ $err and die $err;
+ }
+
+ print "REQUEST:\n";
+ $packet->print;
+
+ $packet->header->qr(1);
+ $packet->header->aa(1);
+
+ my @questions = $packet->question;
+ my $qname = $questions[0]->qname;
+ my $qtype = $questions[0]->qtype;
+
+ if ($qname eq "example.net" && $qtype eq "NS") {
+ $packet->push("answer", new Net::DNS::RR($qname . " 300 NS ns.example.net"));
+ $packet->push("additional", new Net::DNS::RR("ns.example.net 300 A 10.53.0.3"));
+ } elsif ($qname eq "ns.example.net") {
+ $packet->push("answer", new Net::DNS::RR($qname . " 300 A 10.53.0.3"));
+ } elsif ($qname eq "nodata.example.net") {
+ # Do not add a SOA RRset.
+ } elsif ($qname eq "nxdomain.example.net") {
+ # Do not add a SOA RRset.
+ $packet->header->rcode(NXDOMAIN);
+ } elsif ($qname eq "www.example.net") {
+ # Data for address/alias filtering.
+ if ($qtype eq "A") {
+ $packet->push("answer", new Net::DNS::RR($qname . " 300 A 192.0.2.1"));
+ } elsif ($qtype eq "AAAA") {
+ $packet->push("answer", new Net::DNS::RR($qname . " 300 AAAA 2001:db8:beef::1"));
+ }
+ } elsif ($qname eq "badcname.example.net") {
+ $packet->push("answer",
+ new Net::DNS::RR($qname .
+ " 300 CNAME badcname.example.org"));
+ } elsif (($qname eq "baddname.example.net" || $qname eq "gooddname.example.net") && $qtype eq "NS") {
+ $packet->push("authority", new Net::DNS::RR("example.net IN SOA (1 2 3 4 5)"))
+ } elsif ($qname eq "foo.baddname.example.net") {
+ $packet->push("answer",
+ new Net::DNS::RR("baddname.example.net" .
+ " 300 DNAME baddname.example.org"));
+ } elsif ($qname eq "foo.gooddname.example.net") {
+ $packet->push("answer",
+ new Net::DNS::RR("gooddname.example.net" .
+ " 300 DNAME gooddname.example.org"));
+ } elsif ($qname eq "goodcname.example.net") {
+ $packet->push("answer",
+ new Net::DNS::RR($qname .
+ " 300 CNAME goodcname.example.org"));
+ } elsif ($qname =~ /^nodata\.example\.net$/i) {
+ $packet->header->aa(1);
+ } elsif ($qname =~ /^nxdomain\.example\.net$/i) {
+ $packet->header->aa(1);
+ $packet->header->rcode(NXDOMAIN);
+ } elsif ($qname =~ /lame\.example\.org/) {
+ $packet->header->ad(0);
+ $packet->header->aa(0);
+ $packet->push("authority", new Net::DNS::RR("lame.example.org 300 NS ns.lame.example.org"));
+ $packet->push("additional", new Net::DNS::RR("ns.lame.example.org 300 A 10.53.0.3"));
+ } elsif ($qname eq "large-referral.example.net") {
+ for (my $i = 1; $i < 1000; $i++) {
+ $packet->push("authority", new Net::DNS::RR("large-referral.example.net 300 NS ns" . $i . ".fake.redirect.com"));
+ }
+ # No glue records
+ } elsif ($qname eq "foo.bar.sub.tld1") {
+ $packet->push("answer", new Net::DNS::RR("$qname 300 TXT baz"));
+ } elsif ($qname eq "cname.sub.example.org") {
+ $packet->push("answer",
+ new Net::DNS::RR($qname .
+ " 300 CNAME ok.sub.example.org"));
+ } elsif ($qname eq "ok.sub.example.org") {
+ $packet->push("answer",
+ new Net::DNS::RR($qname . " 300 A 192.0.2.1"));
+ } elsif ($qname eq "www.dname.sub.example.org") {
+ $packet->push("answer",
+ new Net::DNS::RR("dname.sub.example.org" .
+ " 300 DNAME ok.sub.example.org"));
+ } elsif ($qname eq "www.ok.sub.example.org") {
+ $packet->push("answer",
+ new Net::DNS::RR($qname . " 300 A 192.0.2.1"));
+ } elsif ($qname eq "foo.glue-in-answer.example.org") {
+ $packet->push("answer", new Net::DNS::RR($qname . " 300 A 192.0.2.1"));
+ } elsif ($qname eq "ns.example.net") {
+ $packet->push("answer",
+ new Net::DNS::RR($qname .
+ " 300 A 10.53.0.3"));
+ } elsif ($qname =~ /\.partial-formerr/) {
+ $packet->push("answer",
+ new Net::DNS::RR($qname . " 1 A 10.53.0.3"));
+ } else {
+ $packet->push("answer", new Net::DNS::RR("www.example.com 300 A 1.2.3.4"));
+ }
+
+ print "RESPONSE:\n";
+ $packet->print;
+
+ return $packet->data;
+}
+
+# Main
+my $rin;
+my $rout;
+for (;;) {
+ $rin = '';
+ vec($rin, fileno($tcpsock), 1) = 1;
+ vec($rin, fileno($udpsock), 1) = 1;
+
+ select($rout = $rin, undef, undef, undef);
+
+ if (vec($rout, fileno($udpsock), 1)) {
+ printf "UDP request\n";
+ my $buf;
+ $udpsock->recv($buf, 512);
+ my $result = handleQuery($buf);
+ my $num_chars = $udpsock->send($result);
+ print " Sent $num_chars bytes via UDP\n";
+ } elsif (vec($rout, fileno($tcpsock), 1)) {
+ my $conn = $tcpsock->accept;
+ my $buf;
+ for (;;) {
+ my $lenbuf;
+ my $n = $conn->sysread($lenbuf, 2);
+ last unless $n == 2;
+ my $len = unpack("n", $lenbuf);
+ $n = $conn->sysread($buf, $len);
+ last unless $n == $len;
+ print "TCP request\n";
+ my $result = handleQuery($buf);
+ $len = length($result);
+ $conn->syswrite(pack("n", $len), 2);
+ $n = $conn->syswrite($result, $len);
+ print " Sent: $n chars via TCP\n";
+ }
+ $conn->close;
+ }
+}
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