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Diffstat (limited to '')
| -rw-r--r-- | bin/tests/system/resolver/ans3/ans.pl | 183 |
1 files changed, 183 insertions, 0 deletions
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; + } +} |