1 files changed, 90 insertions, 0 deletions
diff --git a/bin/tests/system/fetchlimit/ans4/ans.pl b/bin/tests/system/fetchlimit/ans4/ans.pl
new file mode 100644
index 0000000..f44cf8b
--- /dev/null
+++ b/bin/tests/system/fetchlimit/ans4/ans.pl
@@ -0,0 +1,90 @@
+#!/usr/bin/perl -w
+
+# 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.
+
+#
+# Don't respond if the "norespond" file exists; otherwise respond to
+# any A or AAAA query.
+#
+
+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 => "10.53.0.4",
+   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;
+
+	my $donotrespond = 0;
+
+	if (-e 'norespond') {
+		$donotrespond = 1;
+	} else {
+		$packet->header->aa(1);
+		if ($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"));
+		}
+	}
+
+	if ($donotrespond == 0) {
+		if (index($qname, "latency") == 0) {
+			# 50ms latency
+			select(undef, undef, undef, 0.05);
+		}
+		$sock->send($packet->data);
+		print "RESPONSE:\n";
+		$packet->print;
+		print "\n";
+	}
+}