external/bsd/bind/dist/bin/tests/system/resolver/ans2/ans.pl

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (C) 2004, 2007, 2009, 2010, 2012  Internet Systems Consortium, Inc. ("ISC")
   4 # Copyright (C) 2000, 2001  Internet Software Consortium.
   5 #
   6 # Permission to use, copy, modify, and/or distribute this software for any
   7 # purpose with or without fee is hereby granted, provided that the above
   8 # copyright notice and this permission notice appear in all copies.
   9 #
  10 # THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11 # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12 # AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13 # INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14 # LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15 # OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16 # PERFORMANCE OF THIS SOFTWARE.
  17
  18 # Id: ans.pl,v 1.15 2010/05/19 09:33:50 tbox Exp
  19
  20 #
  21 # Ad hoc name server
  22 #
  23
  24 use IO::File;
  25 use IO::Socket;
  26 use Net::DNS;
  27 use Net::DNS::Packet;
  28
  29 my $sock = IO::Socket::INET->new(LocalAddr => "10.53.0.2",
  30    LocalPort => 5300, Proto => "udp") or die "$!";
  31
  32 my $pidf = new IO::File "ans.pid", "w" or die "cannot open pid file: $!";
  33 print $pidf "$$\n" or die "cannot write pid file: $!";
  34 $pidf->close or die "cannot close pid file: $!";
  35 sub rmpid { unlink "ans.pid"; exit 1; };
  36
  37 $SIG{INT} = \&rmpid;
  38 $SIG{TERM} = \&rmpid;
  39
  40 for (;;) {
  41         $sock->recv($buf, 512);
  42
  43         print "**** request from " , $sock->peerhost, " port ", $sock->peerport, "\n";
  44
  45         my $packet;
  46
  47         if ($Net::DNS::VERSION > 0.68) {
  48                 $packet = new Net::DNS::Packet(\$buf, 0);
  49                 $@ and die $@;
  50         } else {
  51                 my $err;
  52                 ($packet, $err) = new Net::DNS::Packet(\$buf, 0);
  53                 $err and die $err;
  54         }
  55
  56         print "REQUEST:\n";
  57         $packet->print;
  58
  59         $packet->header->qr(1);
  60
  61         my @questions = $packet->question;
  62         my $qname = $questions[0]->qname;
  63         my $qtype = $questions[0]->qtype;
  64
  65         if ($qname eq "cname1.example.com") {
  66                 # Data for the "cname + other data / 1" test
  67                 $packet->push("answer", new Net::DNS::RR("cname1.example.com 300 CNAME cname1.example.com"));
  68                 $packet->push("answer", new Net::DNS::RR("cname1.example.com 300 A 1.2.3.4"));
  69         } elsif ($qname eq "cname2.example.com") {
  70                 # Data for the "cname + other data / 2" test: same RRs in opposite order
  71                 $packet->push("answer", new Net::DNS::RR("cname2.example.com 300 A 1.2.3.4"));
  72                 $packet->push("answer", new Net::DNS::RR("cname2.example.com 300 CNAME cname2.example.com"));
  73         } elsif ($qname eq "www.example.org" || $qname eq "www.example.net" ||
  74                  $qname eq "badcname.example.org" ||
  75                  $qname eq "goodcname.example.org" ||
  76                  $qname eq "foo.baddname.example.org" ||
  77                  $qname eq "foo.gooddname.example.org") {
  78                 # Data for address/alias filtering.
  79                 $packet->header->aa(1);
  80                 if ($qtype eq "A") {
  81                         $packet->push("answer",
  82                                       new Net::DNS::RR($qname .
  83                                                        " 300 A 192.0.2.1"));
  84                 } elsif ($qtype eq "AAAA") {
  85                         $packet->push("answer",
  86                                       new Net::DNS::RR($qname .
  87                                                 " 300 AAAA 2001:db8:beef::1"));
  88                 }
  89         } elsif ($qname eq "badcname.example.net" ||
  90                  $qname eq "goodcname.example.net") {
  91                 # Data for CNAME/DNAME filtering.  We need to make one-level
  92                 # delegation to avoid automatic acceptance for subdomain aliases
  93                 $packet->push("authority", new Net::DNS::RR("example.net 300 NS ns.example.net"));
  94                 $packet->push("additional", new Net::DNS::RR("ns.example.net 300 A 10.53.0.3"));
  95         } elsif ($qname =~ /^nodata\.example\.net$/i) {
  96                 $packet->header->aa(1);
  97         } elsif ($qname =~ /^nxdomain\.example\.net$/i) {
  98                 $packet->header->aa(1);
  99                 $packet->header->rcode(NXDOMAIN);
 100         } elsif ($qname =~ /sub\.example\.org/) {
 101                 # Data for CNAME/DNAME filtering.  The final answers are
 102                 # expected to be accepted regardless of the filter setting.
 103                 $packet->push("authority", new Net::DNS::RR("sub.example.org 300 NS ns.sub.example.org"));
 104                 $packet->push("additional", new Net::DNS::RR("ns.sub.example.org 300 A 10.53.0.3"));
 105         } elsif ($qname =~ /\.broken/) {
 106                 # Delegation to broken TLD.
 107                 $packet->push("authority", new Net::DNS::RR("broken 300 NS ns.broken"));
 108                 $packet->push("additional", new Net::DNS::RR("ns.broken 300 A 10.53.0.4"));
 109         } else {
 110                 # Data for the "bogus referrals" test
 111                 $packet->push("authority", new Net::DNS::RR("below.www.example.com 300 NS ns.below.www.example.com"));
 112                 $packet->push("additional", new Net::DNS::RR("ns.below.www.example.com 300 A 10.53.0.3"));
 113         }
 114
 115         $sock->send($packet->data);
 116
 117         print "RESPONSE:\n";
 118         $packet->print;
 119         print "\n";
 120 }