From 45d6379135504814ab723b57f0eb8be23393a51d Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 09:24:22 +0200
Subject: Adding upstream version 1:9.16.44.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 bin/tests/system/resolver/ans2/ans.pl              | 140 ++++
 bin/tests/system/resolver/ans3/ans.pl              | 183 ++++
 bin/tests/system/resolver/ans8/ans.pl              | 168 ++++
 bin/tests/system/resolver/clean.sh                 |  39 +
 bin/tests/system/resolver/ns1/chaostest.db         |  16 +
 bin/tests/system/resolver/ns1/named.conf.in        |  79 ++
 bin/tests/system/resolver/ns1/root.hint            |  14 +
 bin/tests/system/resolver/ns4/broken.db            |  24 +
 bin/tests/system/resolver/ns4/child.server.db      |  23 +
 bin/tests/system/resolver/ns4/moves.db             |  22 +
 bin/tests/system/resolver/ns4/named.conf.in        |  72 ++
 bin/tests/system/resolver/ns4/named.noaa           |  12 +
 bin/tests/system/resolver/ns4/root.db              |  34 +
 bin/tests/system/resolver/ns4/sourcens.db          |  91 ++
 bin/tests/system/resolver/ns4/tld1.db              |  35 +
 bin/tests/system/resolver/ns4/tld2.db              |  35 +
 bin/tests/system/resolver/ns4/v4only.net.db        |  22 +
 bin/tests/system/resolver/ns5/child.server.db      |  23 +
 bin/tests/system/resolver/ns5/moves.db             |  22 +
 bin/tests/system/resolver/ns5/named.conf.in        |  60 ++
 bin/tests/system/resolver/ns5/root.hint            |  14 +
 bin/tests/system/resolver/ns6/broken.db            |  28 +
 bin/tests/system/resolver/ns6/delegation-only.db   |  33 +
 bin/tests/system/resolver/ns6/ds.example.net.db.in |  15 +
 bin/tests/system/resolver/ns6/example.net.db.in    |  23 +
 bin/tests/system/resolver/ns6/fetch.tld.db         |  23 +
 bin/tests/system/resolver/ns6/keygen.sh            |  39 +
 bin/tests/system/resolver/ns6/moves.db             |  22 +
 bin/tests/system/resolver/ns6/named.conf.in        | 101 +++
 .../system/resolver/ns6/no-edns-version.tld.db     |  14 +
 bin/tests/system/resolver/ns6/redirect.com.db      |  27 +
 bin/tests/system/resolver/ns6/root.db              |  36 +
 bin/tests/system/resolver/ns6/targetns.db          |  25 +
 bin/tests/system/resolver/ns6/tld1.db              |  17 +
 .../system/resolver/ns6/to-be-removed.tld.db.in    |  28 +
 bin/tests/system/resolver/ns7/all-cnames.db        |  20 +
 bin/tests/system/resolver/ns7/edns-version.tld.db  |  14 +
 bin/tests/system/resolver/ns7/named1.conf.in       |  74 ++
 bin/tests/system/resolver/ns7/named2.conf.in       |  74 ++
 bin/tests/system/resolver/ns7/root.hint            |  14 +
 bin/tests/system/resolver/ns7/server.db.in         |  24 +
 bin/tests/system/resolver/ns7/sub.tld1.db          |  17 +
 bin/tests/system/resolver/ns7/tld2.db              |  18 +
 bin/tests/system/resolver/ns9/named.args           |   2 +
 bin/tests/system/resolver/ns9/named.conf.in        |  39 +
 bin/tests/system/resolver/ns9/named.ipv6-only      |   0
 bin/tests/system/resolver/ns9/root.hint            |  15 +
 bin/tests/system/resolver/prereq.sh                |  31 +
 bin/tests/system/resolver/setup.sh                 |  28 +
 bin/tests/system/resolver/tests.sh                 | 927 +++++++++++++++++++++
 50 files changed, 2856 insertions(+)
 create mode 100644 bin/tests/system/resolver/ans2/ans.pl
 create mode 100644 bin/tests/system/resolver/ans3/ans.pl
 create mode 100644 bin/tests/system/resolver/ans8/ans.pl
 create mode 100644 bin/tests/system/resolver/clean.sh
 create mode 100644 bin/tests/system/resolver/ns1/chaostest.db
 create mode 100644 bin/tests/system/resolver/ns1/named.conf.in
 create mode 100644 bin/tests/system/resolver/ns1/root.hint
 create mode 100644 bin/tests/system/resolver/ns4/broken.db
 create mode 100644 bin/tests/system/resolver/ns4/child.server.db
 create mode 100644 bin/tests/system/resolver/ns4/moves.db
 create mode 100644 bin/tests/system/resolver/ns4/named.conf.in
 create mode 100644 bin/tests/system/resolver/ns4/named.noaa
 create mode 100644 bin/tests/system/resolver/ns4/root.db
 create mode 100644 bin/tests/system/resolver/ns4/sourcens.db
 create mode 100644 bin/tests/system/resolver/ns4/tld1.db
 create mode 100644 bin/tests/system/resolver/ns4/tld2.db
 create mode 100644 bin/tests/system/resolver/ns4/v4only.net.db
 create mode 100644 bin/tests/system/resolver/ns5/child.server.db
 create mode 100644 bin/tests/system/resolver/ns5/moves.db
 create mode 100644 bin/tests/system/resolver/ns5/named.conf.in
 create mode 100644 bin/tests/system/resolver/ns5/root.hint
 create mode 100644 bin/tests/system/resolver/ns6/broken.db
 create mode 100644 bin/tests/system/resolver/ns6/delegation-only.db
 create mode 100644 bin/tests/system/resolver/ns6/ds.example.net.db.in
 create mode 100644 bin/tests/system/resolver/ns6/example.net.db.in
 create mode 100644 bin/tests/system/resolver/ns6/fetch.tld.db
 create mode 100644 bin/tests/system/resolver/ns6/keygen.sh
 create mode 100644 bin/tests/system/resolver/ns6/moves.db
 create mode 100644 bin/tests/system/resolver/ns6/named.conf.in
 create mode 100644 bin/tests/system/resolver/ns6/no-edns-version.tld.db
 create mode 100644 bin/tests/system/resolver/ns6/redirect.com.db
 create mode 100644 bin/tests/system/resolver/ns6/root.db
 create mode 100644 bin/tests/system/resolver/ns6/targetns.db
 create mode 100644 bin/tests/system/resolver/ns6/tld1.db
 create mode 100644 bin/tests/system/resolver/ns6/to-be-removed.tld.db.in
 create mode 100644 bin/tests/system/resolver/ns7/all-cnames.db
 create mode 100644 bin/tests/system/resolver/ns7/edns-version.tld.db
 create mode 100644 bin/tests/system/resolver/ns7/named1.conf.in
 create mode 100644 bin/tests/system/resolver/ns7/named2.conf.in
 create mode 100644 bin/tests/system/resolver/ns7/root.hint
 create mode 100644 bin/tests/system/resolver/ns7/server.db.in
 create mode 100644 bin/tests/system/resolver/ns7/sub.tld1.db
 create mode 100644 bin/tests/system/resolver/ns7/tld2.db
 create mode 100644 bin/tests/system/resolver/ns9/named.args
 create mode 100644 bin/tests/system/resolver/ns9/named.conf.in
 create mode 100644 bin/tests/system/resolver/ns9/named.ipv6-only
 create mode 100644 bin/tests/system/resolver/ns9/root.hint
 create mode 100644 bin/tests/system/resolver/prereq.sh
 create mode 100644 bin/tests/system/resolver/setup.sh
 create mode 100755 bin/tests/system/resolver/tests.sh

(limited to 'bin/tests/system/resolver')

diff --git a/bin/tests/system/resolver/ans2/ans.pl b/bin/tests/system/resolver/ans2/ans.pl
new file mode 100644
index 0000000..7876508
--- /dev/null
+++ b/bin/tests/system/resolver/ans2/ans.pl
@@ -0,0 +1,140 @@
+#!/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;
+
+my $localport = int($ENV{'PORT'});
+if (!$localport) { $localport = 5300; }
+
+my $sock = IO::Socket::INET->new(LocalAddr => "10.53.0.2",
+   LocalPort => $localport, Proto => "udp") or die "$!";
+
+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;
+
+for (;;) {
+	$sock->recv($buf, 512);
+
+	print "**** request from " , $sock->peerhost, " port ", $sock->peerport, "\n";
+
+	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);
+
+	my @questions = $packet->question;
+	my $qname = $questions[0]->qname;
+	my $qtype = $questions[0]->qtype;
+
+	if ($qname eq "com" && $qtype eq "NS") {
+		$packet->header->aa(1);
+		$packet->push("answer", new Net::DNS::RR("com 300 NS a.root-servers.nil."));
+	} elsif ($qname eq "example.com" && $qtype eq "NS") {
+		$packet->header->aa(1);
+		$packet->push("answer", new Net::DNS::RR("example.com 300 NS a.root-servers.nil."));
+	} elsif ($qname eq "cname1.example.com") {
+		# Data for the "cname + other data / 1" test
+		$packet->push("answer", new Net::DNS::RR("cname1.example.com 300 CNAME cname1.example.com"));
+		$packet->push("answer", new Net::DNS::RR("cname1.example.com 300 A 1.2.3.4"));
+	} elsif ($qname eq "cname2.example.com") {
+		# Data for the "cname + other data / 2" test: same RRs in opposite order
+		$packet->push("answer", new Net::DNS::RR("cname2.example.com 300 A 1.2.3.4"));
+		$packet->push("answer", new Net::DNS::RR("cname2.example.com 300 CNAME cname2.example.com"));
+	} elsif ($qname =~ /redirect\.com/) {
+		$packet->push("authority", new Net::DNS::RR("redirect.com 300 NS ns.redirect.com"));
+		$packet->push("additional", new Net::DNS::RR("ns.redirect.com 300 A 10.53.0.6"));
+	} elsif ($qname =~ /\.tld1/) {
+		$packet->push("authority", new Net::DNS::RR("tld1 300 NS ns.tld1"));
+		$packet->push("additional", new Net::DNS::RR("ns.tld1 300 A 10.53.0.6"));
+	} elsif ($qname =~ /\.tld2/) {
+		$packet->push("authority", new Net::DNS::RR("tld2 300 NS ns.tld2"));
+		$packet->push("additional", new Net::DNS::RR("ns.tld2 300 A 10.53.0.7"));
+	} elsif ($qname eq "org" && $qtype eq "NS") {
+		$packet->header->aa(1);
+		$packet->push("answer", new Net::DNS::RR("org 300 NS a.root-servers.nil."));
+	} elsif ($qname eq "example.org" && $qtype eq "NS") {
+		$packet->header->aa(1);
+		$packet->push("answer", new Net::DNS::RR("example.org 300 NS a.root-servers.nil."));
+	} elsif (($qname eq "baddname.example.org" || $qname eq "gooddname.example.org") && $qtype eq "NS") {
+		$packet->header->aa(1);
+		$packet->push("answer", new Net::DNS::RR("example.org 300 NS a.root-servers.nil."));
+	} elsif ($qname eq "www.example.org" ||
+		 $qname eq "badcname.example.org" ||
+		 $qname eq "goodcname.example.org" ||
+		 $qname eq "foo.baddname.example.org" ||
+		 $qname eq "foo.gooddname.example.org") {
+		# Data for address/alias filtering.
+		$packet->header->aa(1);
+		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 "net" && $qtype eq "NS") {
+		$packet->header->aa(1);
+		$packet->push("answer", new Net::DNS::RR("net 300 NS a.root-servers.nil."));
+	} elsif ($qname =~ /example\.net/) {
+		$packet->push("authority", new Net::DNS::RR("example.net 300 NS ns.example.net"));
+		$packet->push("additional", new Net::DNS::RR("ns.example.net 300 A 10.53.0.3"));
+	} elsif ($qname =~ /sub\.example\.org/) {
+		# Data for CNAME/DNAME filtering.  The final answers are
+		# expected to be accepted regardless of the filter setting.
+		$packet->push("authority", new Net::DNS::RR("sub.example.org 300 NS ns.sub.example.org"));
+		$packet->push("additional", new Net::DNS::RR("ns.sub.example.org 300 A 10.53.0.3"));
+	} elsif ($qname =~ /glue-in-answer\.example\.org/) {
+		$packet->push("answer", new Net::DNS::RR("ns.glue-in-answer.example.org 300 A 10.53.0.3"));
+		$packet->push("authority", new Net::DNS::RR("glue-in-answer.example.org 300 NS ns.glue-in-answer.example.org"));
+		$packet->push("additional", new Net::DNS::RR("ns.glue-in-answer.example.org 300 A 10.53.0.3"));
+	} elsif ($qname =~ /\.broken/ || $qname =~ /^broken/) {
+		# Delegation to broken TLD.
+		$packet->push("authority", new Net::DNS::RR("broken 300 NS ns.broken"));
+		$packet->push("additional", new Net::DNS::RR("ns.broken 300 A 10.53.0.4"));
+	} else {
+		# Data for the "bogus referrals" test
+		$packet->push("authority", new Net::DNS::RR("below.www.example.com 300 NS ns.below.www.example.com"));
+		$packet->push("additional", new Net::DNS::RR("ns.below.www.example.com 300 A 10.53.0.3"));
+	}
+
+	$sock->send($packet->data);
+
+	print "RESPONSE:\n";
+	$packet->print;
+	print "\n";
+}
diff --git a/bin/tests/system/resolver/ans3/ans.pl b/bin/tests/system/resolver/ans3/ans.pl
new file mode 100644
index 0000000..d4d7ae7
--- /dev/null
+++ b/bin/tests/system/resolver/ans3/ans.pl
@@ -0,0 +1,183 @@
+#!/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 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"));
+	} 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;
+	}
+}
diff --git a/bin/tests/system/resolver/ans8/ans.pl b/bin/tests/system/resolver/ans8/ans.pl
new file mode 100644
index 0000000..8c32915
--- /dev/null
+++ b/bin/tests/system/resolver/ans8/ans.pl
@@ -0,0 +1,168 @@
+#!/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.
+
+use IO::File;
+use IO::Socket;
+use Data::Dumper;
+use Net::DNS;
+use Net::DNS::Packet;
+use strict;
+
+# 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 $server_addr = "10.53.0.8";
+
+my $localport = int($ENV{'PORT'});
+if (!$localport) { $localport = 5300; }
+
+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 => $localport, Proto => "tcp", Listen => 5, Reuse => 1) or die "$!";
+
+print "listening on $server_addr:$localport.\n";
+
+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;
+$SIG{TERM} = \&rmpid;
+
+sub handleUDP {
+	my ($buf) = @_;
+	my $request;
+
+	if ($Net::DNS::VERSION > 0.68) {
+		$request = new Net::DNS::Packet(\$buf, 0);
+		$@ and die $@;
+	} else {
+		my $err;
+		($request, $err) = new Net::DNS::Packet(\$buf, 0);
+		$err and die $err;
+	}
+
+	my @questions = $request->question;
+	my $qname = $questions[0]->qname;
+	my $qtype = $questions[0]->qtype;
+	my $qclass = $questions[0]->qclass;
+	my $id = $request->header->id;
+
+	my $response = new Net::DNS::Packet($qname, $qtype, $qclass);
+	$response->header->qr(1);
+	$response->header->aa(1);
+	$response->header->tc(0);
+	$response->header->id($id);
+
+	# Responses to queries for no-questions/NS and ns.no-questions/A are
+	# _not_ malformed or truncated.
+	if ($qname eq "no-questions" && $qtype eq "NS") {
+		$response->push("answer", new Net::DNS::RR($qname . " 300 NS ns.no-questions"));
+		$response->push("additional", new Net::DNS::RR("ns.no-questions. 300 A 10.53.0.8"));
+		return $response->data;
+	} elsif ($qname eq "ns.no-questions") {
+		$response->push("answer", new Net::DNS::RR($qname . " 300 A 10.53.0.8"))
+			if ($qtype eq "A");
+		return $response->data;
+	} elsif ($qname =~ /\.formerr-to-all$/) {
+		$response->header->rcode("FORMERR");
+		return $response->data;
+	}
+
+	# don't use Net::DNS to construct the header only reply as early
+	# versions just get it completely wrong.
+
+	if ($qname eq "truncated.no-questions") {
+		# QR, AA, TC
+		return (pack("nnnnnn", $id, 0x8600, 0, 0, 0, 0));
+	}
+	# QR, AA
+	return (pack("nnnnnn", $id, 0x8400, 0, 0, 0, 0));
+}
+
+sub handleTCP {
+	my ($buf) = @_;
+	my $request;
+
+	if ($Net::DNS::VERSION > 0.68) {
+		$request = new Net::DNS::Packet(\$buf, 0);
+		$@ and die $@;
+	} else {
+		my $err;
+		($request, $err) = new Net::DNS::Packet(\$buf, 0);
+		$err and die $err;
+	}
+
+	my @questions = $request->question;
+	my $qname = $questions[0]->qname;
+	my $qtype = $questions[0]->qtype;
+	my $qclass = $questions[0]->qclass;
+	my $id = $request->header->id;
+
+	my @results = ();
+	my $response = new Net::DNS::Packet($qname, $qtype, $qclass);
+
+	$response->header->qr(1);
+	$response->header->aa(1);
+	$response->header->id($id);
+
+	$response->push("answer", new Net::DNS::RR("$qname 300 A 1.2.3.4"));
+	push(@results, $response->data);
+
+	return \@results;
+}
+
+# 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 $result = handleUDP($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 $result = handleTCP($buf);
+			foreach my $response (@$result) {
+				$len = length($response);
+				$n = $conn->syswrite(pack("n", $len), 2);
+				$n = $conn->syswrite($response, $len);
+				print "    Sent: $n chars via TCP\n";
+			}
+		}
+		$conn->close;
+	}
+}
diff --git a/bin/tests/system/resolver/clean.sh b/bin/tests/system/resolver/clean.sh
new file mode 100644
index 0000000..06d74fc
--- /dev/null
+++ b/bin/tests/system/resolver/clean.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# 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.
+
+#
+# Clean up after resolver tests.
+#
+rm -f */named.conf
+rm -f */named.memstats
+rm -f */named.run
+rm -f */ans.run
+rm -f */*.jdb
+rm -f dig.out dig.out.* dig.*.out.*
+rm -f dig.*.foo.*
+rm -f dig.*.bar.*
+rm -f dig.*.prime.*
+rm -f ns4/tld.db
+rm -f ns6/K*
+rm -f ns6/example.net.db.signed ns6/example.net.db
+rm -f ns6/ds.example.net.db.signed ns6/ds.example.net.db
+rm -f ns6/dsset-ds.example.net*
+rm -f ns6/dsset-example.net* ns6/example.net.db.signed.jnl
+rm -f ns6/named.stats*
+rm -f ns6/to-be-removed.tld.db ns6/to-be-removed.tld.db.jnl
+rm -f ns7/server.db ns7/server.db.jnl
+rm -f resolve.out.*.test*
+rm -f .digrc
+rm -f ns*/named.lock
+rm -f ns5/trusted.conf
+rm -f ns*/managed-keys.bind* ns*/*.mkeys*
diff --git a/bin/tests/system/resolver/ns1/chaostest.db b/bin/tests/system/resolver/ns1/chaostest.db
new file mode 100644
index 0000000..153f31d
--- /dev/null
+++ b/bin/tests/system/resolver/ns1/chaostest.db
@@ -0,0 +1,16 @@
+; 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.
+
+$TTL		3600
+@		CHAOS SOA       @ @ 1970010100 86400 600 86400 300
+@		CHAOS NS        @
+version         CHAOS TXT       "CH 1.0"
+hostname        CHAOS TXT       "unknown"
diff --git a/bin/tests/system/resolver/ns1/named.conf.in b/bin/tests/system/resolver/ns1/named.conf.in
new file mode 100644
index 0000000..7ca1caf
--- /dev/null
+++ b/bin/tests/system/resolver/ns1/named.conf.in
@@ -0,0 +1,79 @@
+/*
+ * 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.
+ */
+
+options {
+	query-source address 10.53.0.1 dscp 1;
+	notify-source 10.53.0.1 dscp 2;
+	transfer-source 10.53.0.1 dscp 3;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.1; };
+	listen-on-v6 { none; };
+	recursion yes;
+	dnssec-validation yes;
+	deny-answer-addresses { 192.0.2.0/24; 2001:db8:beef::/48; }
+		 except-from { "example.org"; };
+	deny-answer-aliases { "example.org"; }
+		except-from { "goodcname.example.net";
+			      "gooddname.example.net"; };
+	allow-query {!10.53.0.8; any; };
+	max-zone-ttl unlimited;
+	attach-cache "globalcache";
+};
+
+server 10.53.0.3 {
+	tcp-only yes;
+};
+
+server 10.42.23.3/32 {
+     notify-source 10.42.22.1;
+     query-source address 10.42.22.1 port 0;
+     transfer-source 10.42.22.1;
+};
+
+server fd92:7065:b8e:ffff::1000 {
+     notify-source-v6 fd92:7065:b8e:ffff::1001;
+     query-source-v6 address fd92:7065:b8e:ffff::1001 port 0;
+     transfer-source-v6 fd92:7065:b8e:ffff::1001;
+};
+
+/*
+ * Must be first view so that there is a CH cache with name
+ * "globalcache" before the recursive "default"/IN view is configured.
+ */
+view "class" chaos {
+	zone "chaostest" CHAOS {
+                type primary;
+                file "chaostest.db";
+        };
+};
+
+/*
+ * Must be second view so that so that we can check we don't attach to the
+ * "globalcache"/CH cache.
+ */
+view "default" {
+	zone "." {
+		type hint;
+		file "root.hint";
+	};
+};
+
+key rndc_key {
+	secret "1234abcd8765";
+	algorithm @DEFAULT_HMAC@;
+};
+
+controls {
+	inet 10.53.0.1 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
diff --git a/bin/tests/system/resolver/ns1/root.hint b/bin/tests/system/resolver/ns1/root.hint
new file mode 100644
index 0000000..993227d
--- /dev/null
+++ b/bin/tests/system/resolver/ns1/root.hint
@@ -0,0 +1,14 @@
+; 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.
+
+$TTL 999999
+.			 IN NS	a.root-servers.nil.
+a.root-servers.nil.	 IN A	10.53.0.2
diff --git a/bin/tests/system/resolver/ns4/broken.db b/bin/tests/system/resolver/ns4/broken.db
new file mode 100644
index 0000000..eb64f85
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/broken.db
@@ -0,0 +1,24 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.tld.
+ns			A	10.53.0.4
+$TTL 5
+sub.broken. 		NS	ns.sub.broken.
+ns.sub.broken.		A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns4/child.server.db b/bin/tests/system/resolver/ns4/child.server.db
new file mode 100644
index 0000000..188eb4a
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/child.server.db
@@ -0,0 +1,23 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns
+ns			A	10.53.0.4
+foo			TXT	"From NS 4"
+bar			TXT	"From NS 4"
diff --git a/bin/tests/system/resolver/ns4/moves.db b/bin/tests/system/resolver/ns4/moves.db
new file mode 100644
index 0000000..dc1c396
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/moves.db
@@ -0,0 +1,22 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.server.
+foo			TXT	"From NS 4"
+bar			TXT	"From NS 4"
diff --git a/bin/tests/system/resolver/ns4/named.conf.in b/bin/tests/system/resolver/ns4/named.conf.in
new file mode 100644
index 0000000..74a4066
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/named.conf.in
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+// NS4
+
+options {
+	query-source address 10.53.0.4 dscp 4;
+	notify-source 10.53.0.4 dscp 5;
+	transfer-source 10.53.0.4 dscp 6;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.4; };
+	listen-on-v6 { none; };
+	recursion no;
+	dnssec-validation no;
+	/* test that named loads with root-delegation-only */
+	root-delegation-only;
+};
+
+zone "." {
+	type primary;
+	file "root.db";
+};
+
+zone "moves" {
+	type primary;
+	file "moves.db";
+};
+
+zone "child.server" {
+	type primary;
+	file "child.server.db";
+};
+
+zone "tld" {
+	type primary;
+	file "tld.db";
+};
+
+zone "broken" {
+	type primary;
+	file "broken.db";
+};
+
+zone "sourcens" {
+    type primary;
+    file "sourcens.db";
+};
+
+zone "v4only.net" {
+	type primary;
+	file "v4only.net.db";
+};
+
+key rndc_key {
+	secret "1234abcd8765";
+	algorithm hmac-sha256;
+};
+
+controls {
+	inet 10.53.0.4 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
diff --git a/bin/tests/system/resolver/ns4/named.noaa b/bin/tests/system/resolver/ns4/named.noaa
new file mode 100644
index 0000000..be78cc2
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/named.noaa
@@ -0,0 +1,12 @@
+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.
+
+Add -T noaa.
diff --git a/bin/tests/system/resolver/ns4/root.db b/bin/tests/system/resolver/ns4/root.db
new file mode 100644
index 0000000..71d90e3
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/root.db
@@ -0,0 +1,34 @@
+; 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.
+
+$TTL 300
+. 			IN SOA	marka.isc.org. a.root.servers.nil. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+.			NS	a.root-servers.nil.
+a.root-servers.nil.	A	10.53.0.4
+all-cnames		NS	cname.tld
+delegation-only.	NS	ns.delegation-only.
+ns.delegation-only.	A	10.53.0.6
+example.net.		NS	ns.example.net.
+ns.example.net.		A	10.53.0.6
+no-questions.		NS	ns.no-questions.
+ns.no-questions.	A	10.53.0.8
+formerr-to-all.		NS	ns.formerr-to-all.
+ns.formerr-to-all.	A	10.53.0.8
+sourcens.		NS	ns.sourcens.
+ns.sourcens.		A	10.53.0.4
+targetns. 		NS	ns.targetns.
+ns.targetns.		A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns4/sourcens.db b/bin/tests/system/resolver/ns4/sourcens.db
new file mode 100644
index 0000000..3567cfb
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/sourcens.db
@@ -0,0 +1,91 @@
+; 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.
+
+; This zone contains a set of delegations with varying numbers of NS
+; records.  This is used to check that BIND is limiting the number of
+; NS records it follows when resolving a delegation.  It tests all
+; numbers of NS records up to twice the number followed.
+
+$TTL 60
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns
+ns			A	10.53.0.4
+
+target1  		NS	ns.fake11.targetns.
+
+target2  		NS	ns.fake21.targetns.
+			NS	ns.fake22.targetns.
+
+target3  		NS	ns.fake31.targetns.
+			NS	ns.fake32.targetns.
+			NS	ns.fake33.targetns.
+
+target4  		NS	ns.fake41.targetns.
+			NS	ns.fake42.targetns.
+			NS	ns.fake43.targetns.
+			NS	ns.fake44.targetns.
+
+target5  		NS	ns.fake51.targetns.
+			NS	ns.fake52.targetns.
+			NS	ns.fake53.targetns.
+			NS	ns.fake54.targetns.
+			NS	ns.fake55.targetns.
+
+target6  		NS	ns.fake61.targetns.
+			NS	ns.fake62.targetns.
+			NS	ns.fake63.targetns.
+			NS	ns.fake64.targetns.
+			NS	ns.fake65.targetns.
+			NS	ns.fake66.targetns.
+
+target7  		NS	ns.fake71.targetns.
+			NS	ns.fake72.targetns.
+			NS	ns.fake73.targetns.
+			NS	ns.fake74.targetns.
+			NS	ns.fake75.targetns.
+			NS	ns.fake76.targetns.
+			NS	ns.fake77.targetns.
+
+target8  		NS	ns.fake81.targetns.
+			NS	ns.fake82.targetns.
+			NS	ns.fake83.targetns.
+			NS	ns.fake84.targetns.
+			NS	ns.fake85.targetns.
+			NS	ns.fake86.targetns.
+			NS	ns.fake87.targetns.
+			NS	ns.fake88.targetns.
+
+target9  		NS	ns.fake91.targetns.
+			NS	ns.fake92.targetns.
+			NS	ns.fake93.targetns.
+			NS	ns.fake94.targetns.
+			NS	ns.fake95.targetns.
+			NS	ns.fake96.targetns.
+			NS	ns.fake97.targetns.
+			NS	ns.fake98.targetns.
+			NS	ns.fake99.targetns.
+
+target10  		NS	ns.fake101.targetns.
+			NS	ns.fake102.targetns.
+			NS	ns.fake103.targetns.
+			NS	ns.fake104.targetns.
+			NS	ns.fake105.targetns.
+			NS	ns.fake106.targetns.
+			NS	ns.fake107.targetns.
+			NS	ns.fake108.targetns.
+			NS	ns.fake109.targetns.
+			NS	ns.fake1010.targetns.
diff --git a/bin/tests/system/resolver/ns4/tld1.db b/bin/tests/system/resolver/ns4/tld1.db
new file mode 100644
index 0000000..03d7908
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/tld1.db
@@ -0,0 +1,35 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.tld.
+ns			A	10.53.0.4
+$TTL 5
+to-be-removed 		NS	ns.to-be-removed
+ns.to-be-removed	A	10.53.0.6
+fetch.tld.		NS	ns.fetch.tld.
+ns.fetch.tld.		A	10.53.0.6
+no-edns-version.tld.	NS	ns.no-edns-version.tld.
+ns.no-edns-version.tld.	A	10.53.0.6
+edns-version.tld.	NS	ns.edns-version.tld.
+ns.edns-version.tld.	A	10.53.0.7
+cname			CNAME	ns7
+ns7			A	10.53.0.7
+mixedttl 10		A	10.0.0.1
+mixedttl 15		TXT	a TXT record
+mixedttl 20		AAAA	2001:db8::1
diff --git a/bin/tests/system/resolver/ns4/tld2.db b/bin/tests/system/resolver/ns4/tld2.db
new file mode 100644
index 0000000..c3a96d9
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/tld2.db
@@ -0,0 +1,35 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.tld.
+ns			A	10.53.0.4
+fetch.tld.		NS	ns.fetch.tld.
+ns.fetch.tld.		A	10.53.0.6
+fetchall  10              A     1.2.3.4
+fetchall  10              AAAA  ::1
+fetchall  10              TXT   A short ttl
+no-edns-version.tld.	NS	ns.no-edns-version.tld.
+ns.no-edns-version.tld.	A	10.53.0.6
+edns-version.tld.	NS	ns.edns-version.tld.
+ns.edns-version.tld.	A	10.53.0.7
+cname			CNAME	ns7
+ns7			A	10.53.0.7
+mixedttl 10		A	10.0.0.1
+mixedttl 15		TXT	a TXT record
+mixedttl 20		AAAA	2001:db8::1
diff --git a/bin/tests/system/resolver/ns4/v4only.net.db b/bin/tests/system/resolver/ns4/v4only.net.db
new file mode 100644
index 0000000..b097f3a
--- /dev/null
+++ b/bin/tests/system/resolver/ns4/v4only.net.db
@@ -0,0 +1,22 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	v4.nameserver.
+			A	10.0.0.1
+*			CNAME	@
diff --git a/bin/tests/system/resolver/ns5/child.server.db b/bin/tests/system/resolver/ns5/child.server.db
new file mode 100644
index 0000000..2517b6c
--- /dev/null
+++ b/bin/tests/system/resolver/ns5/child.server.db
@@ -0,0 +1,23 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns
+ns			A	10.53.0.5
+foo			TXT	"From NS 5"
+bar			TXT	"From NS 5"
diff --git a/bin/tests/system/resolver/ns5/moves.db b/bin/tests/system/resolver/ns5/moves.db
new file mode 100644
index 0000000..57f4e91
--- /dev/null
+++ b/bin/tests/system/resolver/ns5/moves.db
@@ -0,0 +1,22 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.server.
+foo			TXT	"From NS 5"
+bar			TXT	"From NS 5"
diff --git a/bin/tests/system/resolver/ns5/named.conf.in b/bin/tests/system/resolver/ns5/named.conf.in
new file mode 100644
index 0000000..eada94c
--- /dev/null
+++ b/bin/tests/system/resolver/ns5/named.conf.in
@@ -0,0 +1,60 @@
+/*
+ * 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.
+ */
+
+// NS5
+
+options {
+	query-source address 10.53.0.5 dscp 7;
+	notify-source 10.53.0.5 dscp 8;
+	transfer-source 10.53.0.5 dscp 9;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.5; };
+	listen-on-v6 { none; };
+	recursion yes;
+	dnssec-validation yes;
+	querylog yes;
+	prefetch 4 10;
+};
+
+server 10.53.0.7 {
+	edns-version 0;
+};
+
+zone "." {
+	type hint;
+	file "root.hint";
+};
+
+zone "moves" {
+	type primary;
+	file "moves.db";
+};
+
+zone "child.server" {
+	type primary;
+	file "child.server.db";
+};
+
+zone "delegation-only" {
+       type delegation-only;
+};
+
+key rndc_key {
+        secret "1234abcd8765";
+        algorithm hmac-sha256;
+};
+
+controls {
+        inet 10.53.0.5 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
diff --git a/bin/tests/system/resolver/ns5/root.hint b/bin/tests/system/resolver/ns5/root.hint
new file mode 100644
index 0000000..3685f54
--- /dev/null
+++ b/bin/tests/system/resolver/ns5/root.hint
@@ -0,0 +1,14 @@
+; 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.
+
+$TTL 999999
+.			 IN NS	a.root-servers.nil.
+a.root-servers.nil.	 IN A	10.53.0.4
diff --git a/bin/tests/system/resolver/ns6/broken.db b/bin/tests/system/resolver/ns6/broken.db
new file mode 100644
index 0000000..85b36bf
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/broken.db
@@ -0,0 +1,28 @@
+; 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.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+ns	IN A	10.53.0.6
+ns0	IN A	10.53.0.6
+ns1	IN A	10.53.0.6
+ns2	IN A	10.53.0.6
+ns3	IN A	10.53.0.6
+ns4	IN A	10.53.0.6
+ns5	IN A	10.53.0.6
+ns6	IN A	10.53.0.6
+ns7	IN A	10.53.0.6
+ns8	IN A	10.53.0.6
+ns9	IN A	10.53.0.6
+$TTL 1
+@	IN A	10.53.0.6
+www.sub	IN A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns6/delegation-only.db b/bin/tests/system/resolver/ns6/delegation-only.db
new file mode 100644
index 0000000..b144338
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/delegation-only.db
@@ -0,0 +1,33 @@
+; 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.
+
+$TTL 120
+@	IN	SOA	ns	marka.isc.org. 1 0 0 0 120
+@	IN	NS	ns
+@	IN	DNSKEY	256 3 7 AwEAAY9437GPWJHzBeR4FP6eJAie7gh2QSM6LUnbDAHvHOx8MNqgSVRM PZka2rAgivb65/MkT1lXRUegj91iRFP3iggTpCgvdUbcBjsYrdODsrwF YUMIUl1pU0lH9x7KvfFUOfSmG+Rk5UHUWuRZbNyc65Sq69iFXg5c11+8 MAkRoeDF
+;
+;	Delegation only test CDS and CDNSKEY records.  These should be
+;	returned even if delegation-only is set for this zone.
+;
+@	IN	A	1.2.3.4
+@	IN	AAAA	c::1.2.3.4
+@	IN	CDS 	12023 7 2 36FB69A752615831B47EA6EF9EA4619D0FB08ABDA69EA3ED200F4C02FF4921D4
+@	IN	CDNSKEY	256 3 7 AwEAAY9437GPWJHzBeR4FP6eJAie7gh2QSM6LUnbDAHvHOx8MNqgSVRM PZka2rAgivb65/MkT1lXRUegj91iRFP3iggTpCgvdUbcBjsYrdODsrwF YUMIUl1pU0lH9x7KvfFUOfSmG+Rk5UHUWuRZbNyc65Sq69iFXg5c11+8 MAkRoeDF
+;
+;	Delegation only test CDS and CDNSKEY records.  These should be rejected
+;	as they are not at the zone apex.
+;
+a	IN	A	1.2.3.4
+aaaa	IN	AAAA	c::1.2.3.4
+cds	IN	CDS	21366 7 1 E6C1716CFB6BDC84E84CE1AB5510DAC69173B5B2
+cdnskey	IN	CDNSKEY	256 3 7 AwEAAY9437GPWJHzBeR4FP6eJAie7gh2QSM6LUnbDAHvHOx8MNqgSVRM PZka2rAgivb65/MkT1lXRUegj91iRFP3iggTpCgvdUbcBjsYrdODsrwF YUMIUl1pU0lH9x7KvfFUOfSmG+Rk5UHUWuRZbNyc65Sq69iFXg5c11+8 MAkRoeDF
+;
+ns	IN	A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns6/ds.example.net.db.in b/bin/tests/system/resolver/ns6/ds.example.net.db.in
new file mode 100644
index 0000000..fad382b
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/ds.example.net.db.in
@@ -0,0 +1,15 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+ns	IN A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns6/example.net.db.in b/bin/tests/system/resolver/ns6/example.net.db.in
new file mode 100644
index 0000000..740804a
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/example.net.db.in
@@ -0,0 +1,23 @@
+; 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.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+@	IN MX	0 mail
+ns	IN A	10.53.0.6
+mail	IN A	10.53.0.6
+fetch 10 IN TXT A short ttl
+non-zero 10 IN TXT A short ttl
+zero 0  IN TXT	A zero ttl
+$TTL 13
+ds 	IN NS	ns.ds
+ns.ds	IN A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns6/fetch.tld.db b/bin/tests/system/resolver/ns6/fetch.tld.db
new file mode 100644
index 0000000..1d59e5a
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/fetch.tld.db
@@ -0,0 +1,23 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.fetch.tld. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.fetch.tld.
+ns.fetch.tld.		A	10.53.0.6
+
+@	13		TXT	A short ttl
diff --git a/bin/tests/system/resolver/ns6/keygen.sh b/bin/tests/system/resolver/ns6/keygen.sh
new file mode 100644
index 0000000..e992154
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/keygen.sh
@@ -0,0 +1,39 @@
+#!/bin/sh -e
+
+# 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.
+
+SYSTEMTESTTOP=../..
+. $SYSTEMTESTTOP/conf.sh
+
+#
+# We use rsasha256 here to get a ZSK + KSK that don't fit in 512 bytes.
+#
+zone=ds.example.net
+zonefile="${zone}.db"
+infile="${zonefile}.in"
+cp $infile $zonefile
+ksk=$($KEYGEN -q -a rsasha256 -fk $zone)
+zsk=$($KEYGEN -q -a rsasha256 -b 2048 $zone)
+cat $ksk.key $zsk.key >> $zonefile
+$SIGNER -P -o $zone $zonefile > /dev/null
+
+zone=example.net
+zonefile="${zone}.db"
+infile="${zonefile}.in"
+cp $infile $zonefile
+ksk=$($KEYGEN -q -a ${DEFAULT_ALGORITHM} -fk $zone)
+zsk=$($KEYGEN -q -a ${DEFAULT_ALGORITHM} $zone)
+cat $ksk.key $zsk.key dsset-ds.example.net$TP >> $zonefile
+$SIGNER -P -o $zone $zonefile > /dev/null
+
+# Configure a static key to be used by delv
+keyfile_to_static_ds $ksk > ../ns5/trusted.conf
diff --git a/bin/tests/system/resolver/ns6/moves.db b/bin/tests/system/resolver/ns6/moves.db
new file mode 100644
index 0000000..06634ee
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/moves.db
@@ -0,0 +1,22 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns.server.
+foo			TXT	"From NS 6"
+bar			TXT	"From NS 6"
diff --git a/bin/tests/system/resolver/ns6/named.conf.in b/bin/tests/system/resolver/ns6/named.conf.in
new file mode 100644
index 0000000..9ed68be
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/named.conf.in
@@ -0,0 +1,101 @@
+/*
+ * 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.
+ */
+
+// NS6
+
+options {
+	query-source address 10.53.0.6 dscp 10;
+	notify-source 10.53.0.6 dscp 11;
+	transfer-source 10.53.0.6 dscp 12;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.6; };
+	listen-on-v6 { fd92:7065:b8e:ffff::6; };
+	recursion no;
+	dnssec-validation no;
+	querylog yes;
+	statistics-file "named.stats";
+	/*
+	 * test that named loads with root-delegation-only that
+	 * has a exclude list.
+	 */
+	root-delegation-only exclude { "a"; };
+};
+
+zone "." {
+	type primary;
+	file "root.db";
+};
+
+zone "example.net" {
+	type primary;
+	file "example.net.db.signed";
+	allow-update { any; };
+};
+
+zone "ds.example.net" {
+	type primary;
+	file "ds.example.net.db.signed";
+	allow-update { any; };
+};
+
+zone "to-be-removed.tld" {
+	type primary;
+	file "to-be-removed.tld.db";
+	allow-update { any; };
+};
+
+zone "broken" {
+	type primary;
+	file "broken.db";
+	allow-update { any; };
+};
+
+zone "redirect.com" {
+	type primary;
+	file "redirect.com.db";
+};
+
+zone "tld1" {
+	type primary;
+	file "tld1.db";
+};
+
+zone "no-edns-version.tld" {
+	type primary;
+	file "no-edns-version.tld.db";
+};
+
+zone "delegation-only" {
+	type primary;
+	file "delegation-only.db";
+};
+
+zone "fetch.tld" {
+	type primary;
+	file "fetch.tld.db";
+};
+
+zone "targetns" {
+	type primary;
+	file "targetns.db";
+};
+
+key rndc_key {
+        secret "1234abcd8765";
+        algorithm hmac-sha256;
+};
+
+controls {
+        inet 10.53.0.6 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
diff --git a/bin/tests/system/resolver/ns6/no-edns-version.tld.db b/bin/tests/system/resolver/ns6/no-edns-version.tld.db
new file mode 100644
index 0000000..9ab654d
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/no-edns-version.tld.db
@@ -0,0 +1,14 @@
+; 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.
+
+@	SOA	. . 0 0 0 0 0
+@	NS	ns
+ns	A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns6/redirect.com.db b/bin/tests/system/resolver/ns6/redirect.com.db
new file mode 100644
index 0000000..f79f6dd
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/redirect.com.db
@@ -0,0 +1,27 @@
+; 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.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+ns	IN A	10.53.0.6
+
+; 10.53.1.* are non-responsive IP addresses
+$GENERATE 1-100    ns$.fake IN A 10.53.1.$
+$GENERATE 101-200  ns$.fake IN A 10.53.1.${-100}
+$GENERATE 201-300  ns$.fake IN A 10.53.1.${-200}
+$GENERATE 301-400  ns$.fake IN A 10.53.1.${-300}
+$GENERATE 401-500  ns$.fake IN A 10.53.1.${-400}
+$GENERATE 501-600  ns$.fake IN A 10.53.1.${-500}
+$GENERATE 601-700  ns$.fake IN A 10.53.1.${-600}
+$GENERATE 701-800  ns$.fake IN A 10.53.1.${-700}
+$GENERATE 801-900  ns$.fake IN A 10.53.1.${-800}
+$GENERATE 901-1000 ns$.fake IN A 10.53.1.${-900}
diff --git a/bin/tests/system/resolver/ns6/root.db b/bin/tests/system/resolver/ns6/root.db
new file mode 100644
index 0000000..096381c
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/root.db
@@ -0,0 +1,36 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+. 			IN SOA	marka.isc.org. a.root.servers.nil. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+.			NS	a.root-servers.nil.
+a.root-servers.nil.	A	10.53.0.6
+a.root-servers.nil.	AAAA	fd92:7065:b8e:ffff::6
+moves.			NS	ns.server.
+server.			NS	ns7.server.
+ns7.server.		A	10.53.0.7
+;
+; These two delegations are strictly not necessary as the test resolver (ns5)
+; doesn't have this zone as its root.  They are just done for consistency with
+; the delegations in ns4/tld.
+;
+no-edns-version.tld.	NS	ns.no-edns-version.tld.
+ns.no-edns-version.tld.	A	10.53.0.6
+edns-version.tld.	NS	ns.edns-version.tld.
+ns.edns-version.tld.	A	10.53.0.7
+v4only.net.		NS	v4.nameserver.
+v4.nameserver.		A	10.53.0.4
diff --git a/bin/tests/system/resolver/ns6/targetns.db b/bin/tests/system/resolver/ns6/targetns.db
new file mode 100644
index 0000000..4d9496b
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/targetns.db
@@ -0,0 +1,25 @@
+; 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.
+
+; In the test for checking how many NS records BIND will follow, this
+; zone marks the server as the one to which the NS lookups will be
+; directed.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+			NS	ns
+ns			A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns6/tld1.db b/bin/tests/system/resolver/ns6/tld1.db
new file mode 100644
index 0000000..412509b
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/tld1.db
@@ -0,0 +1,17 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+ns	IN A	10.53.0.6
+
+$GENERATE 1-21 sub IN NS sub-ns$.tld2.
diff --git a/bin/tests/system/resolver/ns6/to-be-removed.tld.db.in b/bin/tests/system/resolver/ns6/to-be-removed.tld.db.in
new file mode 100644
index 0000000..5638090
--- /dev/null
+++ b/bin/tests/system/resolver/ns6/to-be-removed.tld.db.in
@@ -0,0 +1,28 @@
+; 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.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+ns	IN A	10.53.0.6
+ns0	IN A	10.53.0.6
+ns1	IN A	10.53.0.6
+ns2	IN A	10.53.0.6
+ns3	IN A	10.53.0.6
+ns4	IN A	10.53.0.6
+ns5	IN A	10.53.0.6
+ns6	IN A	10.53.0.6
+ns7	IN A	10.53.0.6
+ns8	IN A	10.53.0.6
+ns9	IN A	10.53.0.6
+$TTL 1
+@	IN A	10.53.0.6
+www	IN A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns7/all-cnames.db b/bin/tests/system/resolver/ns7/all-cnames.db
new file mode 100644
index 0000000..85003ee
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/all-cnames.db
@@ -0,0 +1,20 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. ns.server. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	cname.tld.
diff --git a/bin/tests/system/resolver/ns7/edns-version.tld.db b/bin/tests/system/resolver/ns7/edns-version.tld.db
new file mode 100644
index 0000000..bcfae40
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/edns-version.tld.db
@@ -0,0 +1,14 @@
+; 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.
+
+@	SOA	. . 0 0 0 0 0
+@	NS	ns
+ns	A	10.53.0.7
diff --git a/bin/tests/system/resolver/ns7/named1.conf.in b/bin/tests/system/resolver/ns7/named1.conf.in
new file mode 100644
index 0000000..2070ffa
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/named1.conf.in
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ */
+
+// NS7
+
+options {
+	query-source address 10.53.0.7 dscp 13;
+	notify-source 10.53.0.7 dscp 14;
+	transfer-source 10.53.0.7 dscp 15;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.7; };
+	listen-on-v6 { fd92:7065:b8e:ffff::7; };
+	recursion yes;
+	dnssec-validation yes;
+	empty-zones-enable yes;
+	disable-empty-zone 20.172.in-addr.arpa;
+	/*
+	 * check prefetch disabled
+	 * check zero ttl not returned
+	 */
+	prefetch 0;
+	querylog yes;
+};
+
+key rndc_key {
+	secret "1234abcd8765";
+	algorithm hmac-sha256;
+};
+
+controls {
+	inet 10.53.0.7 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
+
+zone "." {
+	type hint;
+	file "root.hint";
+};
+
+zone "server" {
+	type primary;
+	file "server.db";
+	allow-update { any; };
+};
+
+zone "edns-version.tld" {
+	type primary;
+	file "edns-version.tld.db";
+};
+
+zone "all-cnames" {
+	type primary;
+	file "all-cnames.db";
+};
+
+zone "tld2" {
+	type primary;
+	file "tld2.db";
+};
+
+zone "sub.tld1" {
+	type primary;
+	file "sub.tld1.db";
+};
diff --git a/bin/tests/system/resolver/ns7/named2.conf.in b/bin/tests/system/resolver/ns7/named2.conf.in
new file mode 100644
index 0000000..2070ffa
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/named2.conf.in
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ */
+
+// NS7
+
+options {
+	query-source address 10.53.0.7 dscp 13;
+	notify-source 10.53.0.7 dscp 14;
+	transfer-source 10.53.0.7 dscp 15;
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { 10.53.0.7; };
+	listen-on-v6 { fd92:7065:b8e:ffff::7; };
+	recursion yes;
+	dnssec-validation yes;
+	empty-zones-enable yes;
+	disable-empty-zone 20.172.in-addr.arpa;
+	/*
+	 * check prefetch disabled
+	 * check zero ttl not returned
+	 */
+	prefetch 0;
+	querylog yes;
+};
+
+key rndc_key {
+	secret "1234abcd8765";
+	algorithm hmac-sha256;
+};
+
+controls {
+	inet 10.53.0.7 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
+
+zone "." {
+	type hint;
+	file "root.hint";
+};
+
+zone "server" {
+	type primary;
+	file "server.db";
+	allow-update { any; };
+};
+
+zone "edns-version.tld" {
+	type primary;
+	file "edns-version.tld.db";
+};
+
+zone "all-cnames" {
+	type primary;
+	file "all-cnames.db";
+};
+
+zone "tld2" {
+	type primary;
+	file "tld2.db";
+};
+
+zone "sub.tld1" {
+	type primary;
+	file "sub.tld1.db";
+};
diff --git a/bin/tests/system/resolver/ns7/root.hint b/bin/tests/system/resolver/ns7/root.hint
new file mode 100644
index 0000000..3337bd5
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/root.hint
@@ -0,0 +1,14 @@
+; 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.
+
+$TTL 999999
+.			 IN NS	a.root-servers.nil.
+a.root-servers.nil.	 IN A	10.53.0.6
diff --git a/bin/tests/system/resolver/ns7/server.db.in b/bin/tests/system/resolver/ns7/server.db.in
new file mode 100644
index 0000000..7d5169a
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/server.db.in
@@ -0,0 +1,24 @@
+; 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.
+
+$TTL 300
+@ 			IN SOA	marka.isc.org. a.root.servers.nil. (
+				2010   	; serial
+				600         	; refresh
+				600         	; retry
+				1200    	; expire
+				600       	; minimum
+				)
+@			NS	ns7
+ns7			A	10.53.0.7
+ns			A	10.53.0.5
+child			NS	ns.child
+ns.child		A	10.53.0.5
diff --git a/bin/tests/system/resolver/ns7/sub.tld1.db b/bin/tests/system/resolver/ns7/sub.tld1.db
new file mode 100644
index 0000000..b2d46c6
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/sub.tld1.db
@@ -0,0 +1,17 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+
+$GENERATE 1-21 @ IN NS sub-ns$.tld2.
+
+$GENERATE 1-21 bar IN NS bar-sub-ns$.tld2.
diff --git a/bin/tests/system/resolver/ns7/tld2.db b/bin/tests/system/resolver/ns7/tld2.db
new file mode 100644
index 0000000..1f31b51
--- /dev/null
+++ b/bin/tests/system/resolver/ns7/tld2.db
@@ -0,0 +1,18 @@
+; 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.
+
+$TTL 600
+@	IN SOA	ns hostmaster 1 1800 900 604800 600
+@	IN NS	ns
+ns	IN A	10.53.0.7
+
+$GENERATE 1-21 sub-ns$ IN A 10.53.0.7
+$GENERATE 1-21 bar-sub-ns$ IN A 10.53.0.3
diff --git a/bin/tests/system/resolver/ns9/named.args b/bin/tests/system/resolver/ns9/named.args
new file mode 100644
index 0000000..0c66bc0
--- /dev/null
+++ b/bin/tests/system/resolver/ns9/named.args
@@ -0,0 +1,2 @@
+# this server is IPv6 only
+-6 -m record -c named.conf -d 99 -D resolver-ns9 -X named.lock -g -T maxcachesize=2097152
diff --git a/bin/tests/system/resolver/ns9/named.conf.in b/bin/tests/system/resolver/ns9/named.conf.in
new file mode 100644
index 0000000..3be31db
--- /dev/null
+++ b/bin/tests/system/resolver/ns9/named.conf.in
@@ -0,0 +1,39 @@
+/*
+ * 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.
+ */
+
+// NS9
+
+options {
+	port @PORT@;
+	pid-file "named.pid";
+	listen-on { none; };
+	listen-on-v6 { fd92:7065:b8e:ffff::9; };
+	recursion yes;
+	dnssec-validation yes;
+	dual-stack-servers { fd92:7065:b8e:ffff::7; };
+	qname-minimization off;
+};
+
+key rndc_key {
+	secret "1234abcd8765";
+	algorithm @DEFAULT_HMAC@;
+};
+
+controls {
+	inet fd92:7065:b8e:ffff::9 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
+};
+
+zone "." {
+	type hint;
+	file "root.hint";
+};
diff --git a/bin/tests/system/resolver/ns9/named.ipv6-only b/bin/tests/system/resolver/ns9/named.ipv6-only
new file mode 100644
index 0000000..e69de29
diff --git a/bin/tests/system/resolver/ns9/root.hint b/bin/tests/system/resolver/ns9/root.hint
new file mode 100644
index 0000000..f74fbf1
--- /dev/null
+++ b/bin/tests/system/resolver/ns9/root.hint
@@ -0,0 +1,15 @@
+; 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.
+
+$TTL 999999
+.			 IN NS	 a.root-servers.nil.
+a.root-servers.nil.	 IN A	 10.53.0.6
+a.root-servers.nil.	 IN AAAA fd92:7065:b8e:ffff::6;
diff --git a/bin/tests/system/resolver/prereq.sh b/bin/tests/system/resolver/prereq.sh
new file mode 100644
index 0000000..902f8db
--- /dev/null
+++ b/bin/tests/system/resolver/prereq.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+# 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.
+
+SYSTEMTESTTOP=..
+. $SYSTEMTESTTOP/conf.sh
+
+if $PERL -e 'use Net::DNS;' 2>/dev/null
+then
+    if $PERL -e 'use Net::DNS; die if ($Net::DNS::VERSION eq "0.76" || $Net::DNS::VERSION eq "0.77");' 2>/dev/null
+    then
+	:
+    else
+	echo_i "Net::DNS version 0.76 and 0.77 have a bug that causes this test to fail: please update." >&2
+	exit 1
+    fi
+else
+    echo_i "This test requires the Net::DNS library." >&2
+    exit 1
+fi
+
+exit 0
diff --git a/bin/tests/system/resolver/setup.sh b/bin/tests/system/resolver/setup.sh
new file mode 100644
index 0000000..0f0832c
--- /dev/null
+++ b/bin/tests/system/resolver/setup.sh
@@ -0,0 +1,28 @@
+#!/bin/sh -e
+
+# 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.
+
+SYSTEMTESTTOP=..
+. $SYSTEMTESTTOP/conf.sh
+
+cp ns4/tld1.db ns4/tld.db
+cp ns6/to-be-removed.tld.db.in ns6/to-be-removed.tld.db
+cp ns7/server.db.in ns7/server.db
+
+copy_setports ns1/named.conf.in ns1/named.conf
+copy_setports ns4/named.conf.in ns4/named.conf
+copy_setports ns5/named.conf.in ns5/named.conf
+copy_setports ns6/named.conf.in ns6/named.conf
+copy_setports ns7/named1.conf.in ns7/named.conf
+copy_setports ns9/named.conf.in ns9/named.conf
+
+(cd ns6 && $SHELL keygen.sh)
diff --git a/bin/tests/system/resolver/tests.sh b/bin/tests/system/resolver/tests.sh
new file mode 100755
index 0000000..379b1d7
--- /dev/null
+++ b/bin/tests/system/resolver/tests.sh
@@ -0,0 +1,927 @@
+#!/bin/sh
+
+# 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.
+
+SYSTEMTESTTOP=..
+. $SYSTEMTESTTOP/conf.sh
+
+dig_with_opts() {
+	"${DIG}" -p "${PORT}" "${@}"
+}
+
+resolve_with_opts() {
+	"${RESOLVE}" -p "${PORT}" "${@}"
+}
+
+rndccmd() {
+	"${RNDC}" -c "${SYSTEMTESTTOP}/common/rndc.conf" -p "${CONTROLPORT}" -s "${@}"
+}
+
+status=0
+n=0
+
+n=$((n+1))
+echo_i "checking non-cachable NXDOMAIN response handling ($n)"
+ret=0
+dig_with_opts +tcp nxdomain.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NXDOMAIN" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+   n=$((n+1))
+   echo_i "checking non-cachable NXDOMAIN response handling using dns_client ($n)"
+   ret=0
+   resolve_with_opts -t a -s 10.53.0.1 nxdomain.example.net 2> resolve.out.ns1.test${n} || ret=1
+   grep "resolution failed: ncache nxdomain" resolve.out.ns1.test${n} > /dev/null || ret=1
+   if [ $ret != 0 ]; then echo_i "failed"; fi
+   status=$((status + ret))
+fi
+
+if [ -x "${RESOLVE}" ] ; then
+   n=$((n+1))
+   echo_i "checking that local bound address can be set (Can't query from a denied address) ($n)"
+   ret=0
+   resolve_with_opts -b 10.53.0.8 -t a -s 10.53.0.1 www.example.org 2> resolve.out.ns1.test${n} || ret=1
+   grep "resolution failed: SERVFAIL" resolve.out.ns1.test${n} > /dev/null || ret=1
+   if [ $ret != 0 ]; then echo_i "failed"; fi
+   status=$((status + ret))
+
+   n=$((n+1))
+   echo_i "checking that local bound address can be set (Can query from an allowed address) ($n)"
+   ret=0
+   resolve_with_opts -b 10.53.0.1 -t a -s 10.53.0.1 www.example.org > resolve.out.ns1.test${n} || ret=1
+   grep "www.example.org..*.192.0.2.1" resolve.out.ns1.test${n} > /dev/null || ret=1
+   if [ $ret != 0 ]; then echo_i "failed"; fi
+   status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking non-cachable NODATA response handling ($n)"
+ret=0
+dig_with_opts +tcp nodata.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking non-cachable NODATA response handling using dns_client ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 nodata.example.net 2> resolve.out.ns1.test${n} || ret=1
+    grep "resolution failed: ncache nxrrset" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking handling of bogus referrals ($n)"
+# If the server has the "INSIST(!external)" bug, this query will kill it.
+dig_with_opts +tcp www.example.com. a @10.53.0.1 >/dev/null || { echo_i "failed"; status=$((status + 1)); }
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking handling of bogus referrals using dns_client ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 www.example.com 2> resolve.out.ns1.test${n} || ret=1
+    grep "resolution failed: SERVFAIL" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "check handling of cname + other data / 1 ($n)"
+dig_with_opts +tcp cname1.example.com. a @10.53.0.1 >/dev/null || { echo_i "failed"; status=$((status + 1)); }
+
+n=$((n+1))
+echo_i "check handling of cname + other data / 2 ($n)"
+dig_with_opts +tcp cname2.example.com. a @10.53.0.1 >/dev/null || { echo_i "failed"; status=$((status + 1)); }
+
+n=$((n+1))
+echo_i "check that server is still running ($n)"
+dig_with_opts +tcp www.example.com. a @10.53.0.1 >/dev/null || { echo_i "failed"; status=$((status + 1)); }
+
+n=$((n+1))
+echo_i "checking answer IPv4 address filtering (deny) ($n)"
+ret=0
+dig_with_opts +tcp www.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: SERVFAIL" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking answer IPv6 address filtering (deny) ($n)"
+ret=0
+dig_with_opts +tcp www.example.net @10.53.0.1 aaaa > dig.out.ns1.test${n} || ret=1
+grep "status: SERVFAIL" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking answer IPv4 address filtering (accept) ($n)"
+ret=0
+dig_with_opts +tcp www.example.org @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking answer IPv4 address filtering using dns_client (accept) ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 www.example.org > resolve.out.ns1.test${n} || ret=1
+    grep "www.example.org..*.192.0.2.1" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking answer IPv6 address filtering (accept) ($n)"
+ret=0
+dig_with_opts +tcp www.example.org @10.53.0.1 aaaa > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking answer IPv6 address filtering using dns_client (accept) ($n)"
+    ret=0
+    resolve_with_opts -t aaaa -s 10.53.0.1 www.example.org > resolve.out.ns1.test${n} || ret=1
+    grep "www.example.org..*.2001:db8:beef::1" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking CNAME target filtering (deny) ($n)"
+ret=0
+dig_with_opts +tcp badcname.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: SERVFAIL" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking CNAME target filtering (accept) ($n)"
+ret=0
+dig_with_opts +tcp goodcname.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking CNAME target filtering using dns_client (accept) ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 goodcname.example.net > resolve.out.ns1.test${n} || ret=1
+    grep "goodcname.example.net..*.goodcname.example.org." resolve.out.ns1.test${n} > /dev/null || ret=1
+    grep "goodcname.example.org..*.192.0.2.1" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking CNAME target filtering (accept due to subdomain) ($n)"
+ret=0
+dig_with_opts +tcp cname.sub.example.org @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking CNAME target filtering using dns_client (accept due to subdomain) ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 cname.sub.example.org > resolve.out.ns1.test${n} || ret=1
+    grep "cname.sub.example.org..*.ok.sub.example.org." resolve.out.ns1.test${n} > /dev/null || ret=1
+    grep "ok.sub.example.org..*.192.0.2.1" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking DNAME target filtering (deny) ($n)"
+ret=0
+dig_with_opts +tcp foo.baddname.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "DNAME target foo.baddname.example.org denied for foo.baddname.example.net/IN" ns1/named.run >/dev/null || ret=1
+grep "status: SERVFAIL" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking DNAME target filtering (accept) ($n)"
+ret=0
+dig_with_opts +tcp foo.gooddname.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking DNAME target filtering using dns_client (accept) ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 foo.gooddname.example.net > resolve.out.ns1.test${n} || ret=1
+    grep "foo.gooddname.example.net..*.gooddname.example.org" resolve.out.ns1.test${n} > /dev/null || ret=1
+    grep "foo.gooddname.example.org..*.192.0.2.1" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "checking DNAME target filtering (accept due to subdomain) ($n)"
+ret=0
+dig_with_opts +tcp www.dname.sub.example.org @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if [ -x "${RESOLVE}" ] ; then
+    n=$((n+1))
+    echo_i "checking DNAME target filtering using dns_client (accept due to subdomain) ($n)"
+    ret=0
+    resolve_with_opts -t a -s 10.53.0.1 www.dname.sub.example.org > resolve.out.ns1.test${n} || ret=1
+    grep "www.dname.sub.example.org..*.ok.sub.example.org." resolve.out.ns1.test${n} > /dev/null || ret=1
+    grep "www.ok.sub.example.org..*.192.0.2.1" resolve.out.ns1.test${n} > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "check that the resolver accepts a referral response with a non-empty ANSWER section ($n)"
+ret=0
+dig_with_opts @10.53.0.1 foo.glue-in-answer.example.org. A > dig.ns1.out.${n} || ret=1
+grep "status: NOERROR" dig.ns1.out.${n} > /dev/null || ret=1
+grep "foo.glue-in-answer.example.org.*192.0.2.1" dig.ns1.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that the resolver limits the number of NS records it follows in a referral response ($n)"
+# ns5 is the recusor being tested.  ns4 holds the sourcens zone containing names with varying numbers of NS
+# records pointing to non-existent nameservers in the targetns zone on ns6.
+ret=0
+rndccmd 10.53.0.5 flush || ret=1   # Ensure cache is empty before doing this test
+for nscount in 1 2 3 4 5 6 7 8 9 10
+do
+        # Verify number of NS records at source server
+        dig_with_opts +norecurse @10.53.0.4 target${nscount}.sourcens ns > dig.ns4.out.${nscount}.${n}
+        sourcerecs=$(grep NS dig.ns4.out.${nscount}.${n} | grep -v ';' | wc -l)
+        test "${sourcerecs}" -eq "${nscount}" || ret=1
+        test "${sourcerecs}" -eq "${nscount}" || echo_i "NS count incorrect for target${nscount}.sourcens"
+        # Expected queries = 2 * number of NS records, up to a maximum of 10.
+        expected=$((nscount*2))
+        if [ "$expected" -gt 10 ]; then expected=10; fi
+        # Work out the queries made by checking statistics on the target before and after the test
+        rndccmd 10.53.0.6 stats || ret=1
+        initial_count=$(awk '/responses sent/ {print $1}' ns6/named.stats)
+        mv ns6/named.stats ns6/named.stats.initial.${nscount}.${n}
+        dig_with_opts @10.53.0.5 target${nscount}.sourcens A > dig.ns5.out.${nscount}.${n} || ret=1
+        rndccmd 10.53.0.6 stats || ret=1
+        final_count=$(awk '/responses sent/ {print $1}' ns6/named.stats)
+        mv ns6/named.stats ns6/named.stats.final.${nscount}.${n}
+        # Check number of queries during the test is as expected
+        actual=$((final_count - initial_count))
+        if [ "$actual" -ne "$expected" ]; then
+                echo_i "query count error: $nscount NS records: expected queries $expected, actual $actual"
+                ret=1
+        fi
+done
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "RT21594 regression test check setup ($n)"
+ret=0
+# Check that "aa" is not being set by the authoritative server.
+dig_with_opts +tcp . @10.53.0.4 soa > dig.ns4.out.${n} || ret=1
+grep 'flags: qr rd;' dig.ns4.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "RT21594 regression test positive answers ($n)"
+ret=0
+# Check that resolver accepts the non-authoritative positive answers.
+dig_with_opts +tcp . @10.53.0.5 soa > dig.ns5.out.${n} || ret=1
+grep "status: NOERROR" dig.ns5.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "RT21594 regression test NODATA answers ($n)"
+ret=0
+# Check that resolver accepts the non-authoritative nodata answers.
+dig_with_opts +tcp . @10.53.0.5 txt > dig.ns5.out.${n} || ret=1
+grep "status: NOERROR" dig.ns5.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "RT21594 regression test NXDOMAIN answers ($n)"
+ret=0
+# Check that resolver accepts the non-authoritative positive answers.
+dig_with_opts +tcp noexistent @10.53.0.5 txt > dig.ns5.out.${n} || ret=1
+grep "status: NXDOMAIN" dig.ns5.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that replacement of additional data by a negative cache no data entry clears the additional RRSIGs ($n)"
+ret=0
+dig_with_opts +tcp mx example.net @10.53.0.7 > dig.ns7.out.${n} || ret=1
+grep "status: NOERROR" dig.ns7.out.${n} > /dev/null || ret=1
+if [ $ret = 1 ]; then echo_i "mx priming failed"; fi
+$NSUPDATE << EOF
+server 10.53.0.6 ${PORT}
+zone example.net
+update delete mail.example.net A
+update add mail.example.net 0 AAAA ::1
+send
+EOF
+dig_with_opts +tcp a mail.example.net @10.53.0.7 > dig.ns7.out.${n} || ret=2
+grep "status: NOERROR" dig.ns7.out.${n} > /dev/null || ret=2
+grep "ANSWER: 0" dig.ns7.out.${n} > /dev/null || ret=2
+if [ $ret = 2 ]; then echo_i "ncache priming failed"; fi
+dig_with_opts +tcp mx example.net @10.53.0.7 > dig.ns7.out.${n} || ret=3
+grep "status: NOERROR" dig.ns7.out.${n} > /dev/null || ret=3
+dig_with_opts +tcp rrsig mail.example.net +norec @10.53.0.7 > dig.ns7.out.${n}  || ret=4
+grep "status: NOERROR" dig.ns7.out.${n} > /dev/null || ret=4
+grep "ANSWER: 0" dig.ns7.out.${n} > /dev/null || ret=4
+if [ $ret != 0 ]; then echo_i "failed"; ret=1; fi
+status=$((status + ret))
+
+if [ $ret != 0 ]; then echo_i "failed"; ret=1; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking that update a nameservers address has immediate effects ($n)"
+ret=0
+dig_with_opts +tcp TXT foo.moves @10.53.0.7 > dig.ns7.foo.${n} || ret=1
+grep "From NS 5" dig.ns7.foo.${n} > /dev/null || ret=1
+$NSUPDATE << EOF
+server 10.53.0.7 ${PORT}
+zone server
+update delete ns.server A
+update add ns.server 300 A 10.53.0.4
+send
+EOF
+sleep 1
+dig_with_opts +tcp TXT bar.moves @10.53.0.7 > dig.ns7.bar.${n} || ret=1
+grep "From NS 4" dig.ns7.bar.${n} > /dev/null || ret=1
+
+if [ $ret != 0 ]; then echo_i "failed"; status=1; fi
+
+n=$((n+1))
+echo_i "checking that update a nameservers glue has immediate effects ($n)"
+ret=0
+dig_with_opts +tcp TXT foo.child.server @10.53.0.7 > dig.ns7.foo.${n} || ret=1
+grep "From NS 5" dig.ns7.foo.${n} > /dev/null || ret=1
+$NSUPDATE << EOF
+server 10.53.0.7 ${PORT}
+zone server
+update delete ns.child.server A
+update add ns.child.server 300 A 10.53.0.4
+send
+EOF
+sleep 1
+dig_with_opts +tcp TXT bar.child.server @10.53.0.7 > dig.ns7.bar.${n} || ret=1
+grep "From NS 4" dig.ns7.bar.${n} > /dev/null || ret=1
+
+if [ $ret != 0 ]; then echo_i "failed"; status=1; fi
+
+n=$((n+1))
+echo_i "checking empty RFC 1918 reverse zones ($n)"
+ret=0
+# Check that "aa" is being set by the resolver for RFC 1918 zones
+# except the one that has been deliberately disabled
+dig_with_opts @10.53.0.7 -x 10.1.1.1 > dig.ns4.out.1.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.1.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 192.168.1.1 > dig.ns4.out.2.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.2.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.16.1.1  > dig.ns4.out.3.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.3.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.17.1.1 > dig.ns4.out.4.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.4.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.18.1.1 > dig.ns4.out.5.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.5.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.19.1.1 > dig.ns4.out.6.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.6.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.21.1.1 > dig.ns4.out.7.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.7.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.22.1.1 > dig.ns4.out.8.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.8.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.23.1.1 > dig.ns4.out.9.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.9.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.24.1.1 > dig.ns4.out.11.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.11.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.25.1.1 > dig.ns4.out.12.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.12.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.26.1.1 > dig.ns4.out.13.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.13.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.27.1.1 > dig.ns4.out.14.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.14.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.28.1.1 > dig.ns4.out.15.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.15.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.29.1.1 > dig.ns4.out.16.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.16.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.30.1.1 > dig.ns4.out.17.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.17.${n} > /dev/null || ret=1
+dig_with_opts @10.53.0.7 -x 172.31.1.1 > dig.ns4.out.18.${n} || ret=1
+grep 'flags: qr aa rd ra;' dig.ns4.out.18.${n} > /dev/null || ret=1
+# but this one should NOT be authoritative
+dig_with_opts @10.53.0.7 -x 172.20.1.1 > dig.ns4.out.19.${n} || ret=1
+grep 'flags: qr rd ra;' dig.ns4.out.19.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; status=1; fi
+
+n=$((n+1))
+echo_i "checking that removal of a delegation is honoured ($n)"
+ret=0
+dig_with_opts @10.53.0.5 www.to-be-removed.tld A > dig.ns5.prime.${n}
+grep "status: NOERROR" dig.ns5.prime.${n} > /dev/null || { ret=1; echo_i "priming failed"; }
+cp ns4/tld2.db ns4/tld.db
+rndc_reload ns4 10.53.0.4 tld
+old=
+for i in 0 1 2 3 4 5 6 7 8 9
+do
+	foo=0
+	dig_with_opts @10.53.0.5 ns$i.to-be-removed.tld A > /dev/null
+	dig_with_opts @10.53.0.5 www.to-be-removed.tld A > dig.ns5.out.${n}
+	grep "status: NXDOMAIN" dig.ns5.out.${n} > /dev/null || foo=1
+	[ $foo = 0 ] && break
+	$NSUPDATE << EOF
+server 10.53.0.6 ${PORT}
+zone to-be-removed.tld
+update add to-be-removed.tld 100 NS ns${i}.to-be-removed.tld
+update delete to-be-removed.tld NS ns${old}.to-be-removed.tld
+send
+EOF
+	old=$i
+	sleep 1
+done
+[ $ret = 0 ] && ret=$foo;
+if [ $ret != 0 ]; then echo_i "failed"; status=1; fi
+
+n=$((n+1))
+echo_i "check for improved error message with SOA mismatch ($n)"
+ret=0
+dig_with_opts @10.53.0.1 www.sub.broken aaaa > dig.out.ns1.test${n} || ret=1
+grep "not subdomain of zone" ns1/named.run > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+copy_setports ns7/named2.conf.in ns7/named.conf
+rndccmd 10.53.0.7 reconfig 2>&1 | sed 's/^/ns7 /' | cat_i
+
+n=$((n+1))
+echo_i "check resolution on the listening port ($n)"
+ret=0
+dig_with_opts +tcp +tries=2 +time=5 mx example.net @10.53.0.7 > dig.ns7.out.${n} || ret=2
+grep "status: NOERROR" dig.ns7.out.${n} > /dev/null || ret=1
+grep "ANSWER: 1" dig.ns7.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; ret=1; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check prefetch (${n})"
+ret=0
+# read prefetch value from config.
+PREFETCH=$(sed -n "s/[[:space:]]*prefetch \([0-9]\).*/\1/p" ns5/named.conf)
+dig_with_opts @10.53.0.5 fetch.tld txt > dig.out.1.${n} || ret=1
+ttl1=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.1.${n})
+interval=$((ttl1 - PREFETCH + 1))
+# sleep so we are in prefetch range
+sleep ${interval:-0}
+# trigger prefetch
+dig_with_opts @10.53.0.5 fetch.tld txt > dig.out.2.${n} || ret=1
+ttl2=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.2.${n})
+sleep 1
+# check that prefetch occurred
+dig_with_opts @10.53.0.5 fetch.tld txt > dig.out.3.${n} || ret=1
+ttl=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.3.${n})
+test "${ttl:-0}" -gt "${ttl2:-1}" || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check prefetch of validated DS's RRSIG TTL is updated (${n})"
+ret=0
+dig_with_opts +dnssec @10.53.0.5 ds.example.net ds > dig.out.1.${n} || ret=1
+dsttl1=$(awk '$4 == "DS" && $7 == "2" { print $2 }' dig.out.1.${n})
+interval=$((dsttl1 - PREFETCH + 1))
+# sleep so we are in prefetch range
+sleep ${interval:-0}
+# trigger prefetch
+dig_with_opts @10.53.0.5 ds.example.net ds > dig.out.2.${n} || ret=1
+dsttl2=$(awk '$4 == "DS" && $7 == "2" { print $2 }' dig.out.2.${n})
+sleep 1
+# check that prefetch occurred
+dig_with_opts @10.53.0.5 ds.example.net ds +dnssec > dig.out.3.${n} || ret=1
+dsttl=$(awk '$4 == "DS" && $7 == "2" { print $2 }' dig.out.3.${n})
+sigttl=$(awk '$4 == "RRSIG" && $5 == "DS" { print $2 }' dig.out.3.${n})
+test "${dsttl:-0}" -gt "${dsttl2:-1}" || ret=1
+test "${sigttl:-0}" -gt "${dsttl2:-1}" || ret=1
+test "${dsttl:-0}" -eq "${sigttl:-1}" || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check prefetch disabled (${n})"
+ret=0
+dig_with_opts @10.53.0.7 fetch.example.net txt > dig.out.1.${n} || ret=1
+ttl1=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.1.${n})
+interval=$((ttl1 - PREFETCH + 1))
+# sleep so we are in expire range
+sleep ${interval:-0}
+tmp_ttl=$ttl1
+no_prefetch() {
+	# fetch record and ensure its ttl is in range 0 < ttl < tmp_ttl.
+	# since prefetch is disabled, updated ttl must be a lower value than
+	# the previous one.
+	dig_with_opts @10.53.0.7 fetch.example.net txt > dig.out.2.${n} || return 1
+	ttl2=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.2.${n})
+        # check that prefetch has not occurred
+        if [ "$ttl2" -ge "${tmp_ttl}" ]; then
+                return 1
+        fi
+        tmp_ttl=$ttl2
+}
+retry_quiet 3 no_prefetch || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check prefetch qtype * (${n})"
+ret=0
+dig_with_opts @10.53.0.5 fetchall.tld any > dig.out.1.${n} || ret=1
+ttl1=$(awk '/"A" "short" "ttl"/ { print $2 - 3 }' dig.out.1.${n})
+# sleep so we are in prefetch range
+sleep "${ttl1:-0}"
+# trigger prefetch
+dig_with_opts @10.53.0.5 fetchall.tld any > dig.out.2.${n} || ret=1
+ttl2=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.2.${n})
+sleep 1
+# check that prefetch occurred;
+# note that only one record is prefetched, which is the TXT record in this case,
+# because of the order of the records in the cache
+dig_with_opts @10.53.0.5 fetchall.tld any > dig.out.3.${n} || ret=1
+ttl3=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.3.${n})
+test "${ttl3:-0}" -gt "${ttl2:-1}" || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that E was logged on EDNS queries in the query log (${n})"
+ret=0
+dig_with_opts @10.53.0.5 +edns edns.fetchall.tld any > dig.out.2.${n} || ret=1
+grep "query: edns.fetchall.tld IN ANY +E" ns5/named.run > /dev/null || ret=1
+dig_with_opts @10.53.0.5 +noedns noedns.fetchall.tld any > dig.out.2.${n} || ret=1
+grep "query: noedns.fetchall.tld IN ANY" ns5/named.run > /dev/null || ret=1
+grep "query: noedns.fetchall.tld IN ANY +E" ns5/named.run > /dev/null && ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that '-t aaaa' in .digrc does not have unexpected side effects ($n)"
+ret=0
+echo "-t aaaa" > .digrc
+(HOME="$(pwd)" dig_with_opts @10.53.0.4 . > dig.out.1.${n}) || ret=1
+(HOME="$(pwd)" dig_with_opts @10.53.0.4 . A > dig.out.2.${n}) || ret=1
+(HOME="$(pwd)" dig_with_opts @10.53.0.4 -x 127.0.0.1 > dig.out.3.${n}) || ret=1
+grep ';\..*IN.*AAAA$' dig.out.1.${n} > /dev/null || ret=1
+grep ';\..*IN.*A$' dig.out.2.${n} > /dev/null || ret=1
+grep 'extra type option' dig.out.2.${n} > /dev/null && ret=1
+grep ';1\.0\.0\.127\.in-addr\.arpa\..*IN.*PTR$' dig.out.3.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+edns=$($FEATURETEST --edns-version)
+
+n=$((n+1))
+echo_i "check that EDNS version is logged (${n})"
+ret=0
+dig_with_opts @10.53.0.5 +edns edns0.fetchall.tld any > dig.out.2.${n} || ret=1
+grep "query: edns0.fetchall.tld IN ANY +E(0)" ns5/named.run > /dev/null || ret=1
+if test "${edns:-0}" != 0; then
+    dig_with_opts @10.53.0.5 +edns=1 edns1.fetchall.tld any > dig.out.2.${n} || ret=1
+    grep "query: edns1.fetchall.tld IN ANY +E(1)" ns5/named.run > /dev/null || ret=1
+fi
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+if test "${edns:-0}" != 0; then
+    n=$((n+1))
+    echo_i "check that edns-version is honoured (${n})"
+    ret=0
+    dig_with_opts @10.53.0.5 +edns no-edns-version.tld > dig.out.1.${n} || ret=1
+    grep "query: no-edns-version.tld IN A -E(1)" ns6/named.run > /dev/null || ret=1
+    dig_with_opts @10.53.0.5 +edns edns-version.tld > dig.out.2.${n} || ret=1
+    grep "query: edns-version.tld IN A -E(0)" ns7/named.run > /dev/null || ret=1
+    if [ $ret != 0 ]; then echo_i "failed"; fi
+    status=$((status + ret))
+fi
+
+n=$((n+1))
+echo_i "check that CNAME nameserver is logged correctly (${n})"
+ret=0
+dig_with_opts soa all-cnames @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: SERVFAIL" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "skipping nameserver 'cname.tld' because it is a CNAME, while resolving 'all-cnames/SOA'" ns5/named.run > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that unexpected opcodes are handled correctly (${n})"
+ret=0
+dig_with_opts soa all-cnames @10.53.0.5 +opcode=15 +cd +rec +ad +zflag > dig.out.ns5.test${n} || ret=1
+grep "status: NOTIMP" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "flags:[^;]* qr[; ]" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "flags:[^;]* ra[; ]" dig.out.ns5.test${n} > /dev/null && ret=1
+grep "flags:[^;]* rd[; ]" dig.out.ns5.test${n} > /dev/null && ret=1
+grep "flags:[^;]* cd[; ]" dig.out.ns5.test${n} > /dev/null && ret=1
+grep "flags:[^;]* ad[; ]" dig.out.ns5.test${n} > /dev/null && ret=1
+grep "flags:[^;]*; MBZ: " dig.out.ns5.test${n} > /dev/null && ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that EDNS client subnet with non-zeroed bits is handled correctly (${n})"
+ret=0
+# 0001 (IPv4) 1f (31 significant bits) 00 (0) ffffffff (255.255.255.255)
+dig_with_opts soa . @10.53.0.5 +ednsopt=8:00011f00ffffffff > dig.out.ns5.test${n} || ret=1
+grep "status: FORMERR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "; EDNS: version:" dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that dig +subnet zeros address bits correctly (${n})"
+ret=0
+dig_with_opts soa . @10.53.0.5 +subnet=255.255.255.255/23 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "CLIENT-SUBNET: 255.255.254.0/23/0" dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that SOA query returns data for delegation-only apex (${n})"
+ret=0
+dig_with_opts soa delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+n=$((n+1))
+
+n=$((n+1))
+echo_i "check that NS query returns data for delegation-only apex (${n})"
+ret=0
+dig_with_opts ns delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that A query returns data for delegation-only A apex (${n})"
+ret=0
+dig_with_opts a delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that CDS query returns data for delegation-only apex (${n})"
+ret=0
+dig_with_opts cds delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that AAAA query returns data for delegation-only AAAA apex (${n})"
+ret=0
+dig_with_opts a delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+n=$((n+1))
+
+echo_i "check that DNSKEY query returns data for delegation-only apex (${n})"
+ret=0
+dig_with_opts dnskey delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that CDNSKEY query returns data for delegation-only apex (${n})"
+ret=0
+dig_with_opts cdnskey delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns5.test${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that NXDOMAIN is returned for delegation-only non-apex A data (${n})"
+ret=0
+dig_with_opts a a.delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NXDOMAIN" dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that NXDOMAIN is returned for delegation-only non-apex CDS data (${n})"
+ret=0
+dig_with_opts cds cds.delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NXDOMAIN" dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that NXDOMAIN is returned for delegation-only non-apex AAAA data (${n})"
+ret=0
+dig_with_opts aaaa aaaa.delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NXDOMAIN" dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+n=$((n+1))
+
+echo_i "check that NXDOMAIN is returned for delegation-only non-apex CDNSKEY data (${n})"
+ret=0
+dig_with_opts cdnskey cdnskey.delegation-only @10.53.0.5 > dig.out.ns5.test${n} || ret=1
+grep "status: NXDOMAIN" dig.out.ns5.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check zero ttl not returned for learnt non zero ttl records (${n})"
+ret=0
+# use prefetch disabled server
+dig_with_opts @10.53.0.7 non-zero.example.net txt > dig.out.1.${n} || ret=1
+ttl1=$(awk '/"A" "short" "ttl"/ { print $2 - 2 }' dig.out.1.${n})
+# sleep so we are in expire range
+sleep "${ttl1:-0}"
+# look for ttl = 1, allow for one miss at getting zero ttl
+zerotonine="0 1 2 3 4 5 6 7 8 9"
+zerotonine="$zerotonine $zerotonine $zerotonine"
+for i in $zerotonine $zerotonine $zerotonine $zerotonine
+do
+	dig_with_opts @10.53.0.7 non-zero.example.net txt > dig.out.2.${n} || ret=1
+	ttl2=$(awk '/"A" "short" "ttl"/ { print $2 }' dig.out.2.${n})
+	test "${ttl2:-1}" -eq 0 && break
+	test "${ttl2:-1}" -ge "${ttl1:-0}" && break
+	"${PERL}" -e 'select(undef, undef, undef, 0.05);'
+done
+test "${ttl2:-1}" -eq 0 && ret=1
+test "${ttl2:-1}" -ge "${ttl1:-0}" || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check zero ttl is returned for learnt zero ttl records (${n})"
+ret=0
+dig_with_opts @10.53.0.7 zero.example.net txt > dig.out.1.${n} || ret=1
+ttl=$(awk '/"A" "zero" "ttl"/ { print $2 }' dig.out.1.${n})
+test "${ttl:-1}" -eq 0 || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that 'ad' in not returned in truncated answer with empty answer and authority sections to request with +ad (${n})"
+ret=0
+dig_with_opts @10.53.0.6 dnskey ds.example.net +bufsize=512 +ad +nodnssec +ignore +norec > dig.out.$n
+grep "flags: qr aa tc; QUERY: 1, ANSWER: 0, AUTHORITY: 0" dig.out.$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that 'ad' in not returned in truncated answer with empty answer and authority sections to request with +dnssec (${n})"
+ret=0
+dig_with_opts @10.53.0.6 dnskey ds.example.net +bufsize=512 +noad +dnssec +ignore +norec > dig.out.$n
+grep "flags: qr aa tc; QUERY: 1, ANSWER: 0, AUTHORITY: 0" dig.out.$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that the resolver accepts a reply with empty question section with TC=1 and retries over TCP ($n)"
+ret=0
+dig_with_opts @10.53.0.5 truncated.no-questions. a +tries=3 +time=5 > dig.ns5.out.${n} || ret=1
+grep "status: NOERROR" dig.ns5.out.${n} > /dev/null || ret=1
+grep "ANSWER: 1," dig.ns5.out.${n} > /dev/null || ret=1
+grep "1\.2\.3\.4" dig.ns5.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that the resolver rejects a reply with empty question section with TC=0 ($n)"
+ret=0
+dig_with_opts @10.53.0.5 not-truncated.no-questions. a +tries=3 +time=5 > dig.ns5.out.${n} || ret=1
+grep "status: NOERROR" dig.ns5.out.${n} > /dev/null && ret=1
+grep "ANSWER: 1," dig.ns5.out.${n} > /dev/null && ret=1
+grep "1\.2\.3\.4" dig.ns5.out.${n} > /dev/null && ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking SERVFAIL is returned when all authoritative servers return FORMERR ($n)"
+ret=0
+dig_with_opts @10.53.0.5 ns.formerr-to-all. a > dig.ns5.out.${n} || ret=1
+grep "status: SERVFAIL" dig.ns5.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check logged command line ($n)"
+ret=0
+grep "running as: .* -m record,size,mctx " ns1/named.run > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking NXDOMAIN is returned when querying non existing domain in CH class ($n)"
+ret=0
+dig_with_opts @10.53.0.1 id.hostname txt ch > dig.ns1.out.${n} || ret=1
+grep "status: NXDOMAIN" dig.ns1.out.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check handling of large referrals to unresponsive name servers ($n)"
+ret=0
+dig_with_opts +timeout=15 large-referral.example.net @10.53.0.1 a > dig.out.ns1.test${n} || ret=1
+grep "status: SERVFAIL" dig.out.ns1.test${n} > /dev/null || ret=1
+# Check the total number of findname() calls triggered by a single query
+# for large-referral.example.net/A.
+findname_call_count="$(grep -c "large-referral\.example\.net.*FINDNAME" ns1/named.run)"
+if [ "${findname_call_count}" -gt 1000 ]; then
+	echo_i "failed: ${findname_call_count} (> 1000) findname() calls detected for large-referral.example.net"
+	ret=1
+fi
+# Check whether the limit of NS RRs processed for any delegation
+# encountered was not exceeded.
+if grep -Eq "dns_adb_createfind: started (A|AAAA) fetch for name ns21.fake.redirect.com" ns1/named.run; then
+	echo_i "failed: unexpected address fetch(es) were triggered for ns21.fake.redirect.com"
+	ret=1
+fi
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "checking query resolution for a domain with a valid glueless delegation chain ($n)"
+ret=0
+rndccmd 10.53.0.1 flush || ret=1
+dig_with_opts foo.bar.sub.tld1 @10.53.0.1 TXT > dig.out.ns1.test${n} || ret=1
+grep "status: NOERROR" dig.out.ns1.test${n} > /dev/null || ret=1
+grep "IN.*TXT.*baz" dig.out.ns1.test${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check that correct namespace is chosen for dual-stack-servers ($n)"
+ret=0
+#
+# The two priming queries are needed until we fix dual-stack-servers fully
+#
+dig_with_opts @fd92:7065:b8e:ffff::9 v4.nameserver A > dig.out.prime1.${n} || ret=1
+dig_with_opts @fd92:7065:b8e:ffff::9 v4.nameserver AAAA > dig.out.prime2.${n} || ret=1
+dig_with_opts @fd92:7065:b8e:ffff::9 foo.v4only.net A > dig.out.ns9.${n} || ret=1
+grep "status: NOERROR" dig.out.ns9.${n} > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n+1))
+echo_i "check expired TTLs with qtype * (${n})"
+ret=0
+dig_with_opts +tcp @10.53.0.5 mixedttl.tld any > dig.out.1.${n} || ret=1
+ttl1=$(awk '$1 == "mixedttl.tld." && $4 == "A" { print $2 + 1 }' dig.out.1.${n})
+# sleep TTL + 1 so that record has expired
+sleep "${ttl1:-0}"
+dig_with_opts +tcp @10.53.0.5 mixedttl.tld any > dig.out.2.${n} || ret=1
+# check preconditions
+grep "ANSWER: 3," dig.out.1.${n} > /dev/null || ret=1
+lines=$(awk '$1 == "mixedttl.tld." && $2 > 30 { print }' dig.out.1.${n} | wc -l)
+test ${lines:-1} -ne 0 && ret=1
+# check behaviour (there may be 1 answer on very slow machines)
+grep "ANSWER: [12]," dig.out.2.${n} > /dev/null || ret=1
+lines=$(awk '$1 == "mixedttl.tld." && $2 > 30 { print }' dig.out.2.${n} | wc -l)
+test ${lines:-1} -ne 0 && ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+echo_i "exit status: $status"
+[ $status -eq 0 ] || exit 1
-- 
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