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-rw-r--r--bin/tests/system/resolver/ans8/ans.pl177
1 files changed, 177 insertions, 0 deletions
diff --git a/bin/tests/system/resolver/ans8/ans.pl b/bin/tests/system/resolver/ans8/ans.pl
new file mode 100644
index 0000000..a3d06b6
--- /dev/null
+++ b/bin/tests/system/resolver/ans8/ans.pl
@@ -0,0 +1,177 @@
+#!/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: forces TCP retry
+ return (pack("nnnnnn", $id, 0x8600, 0, 0, 0, 0));
+ } elsif ($qname eq "tcpalso.no-questions") {
+ # QR, REFUSED: forces TCP retry
+ return (pack("nnnnnn", $id, 0x8205, 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"));
+
+ if ($qname eq "tcpalso.no-questions") {
+ # for this qname we also return a bad reply over TCP
+ # QR, REFUSED, no question section
+ push (@results, pack("nnnnnn", $id, 0x8005, 0, 0, 0, 0));
+ } else {
+ 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;
+ }
+}