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

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (C) 2004, 2007, 2009  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 1.13 2009/11/04 02:15:30 marka 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, $err) = new Net::DNS::Packet(\$buf, 0);
  46         $err and die $err;
  47
  48         print "REQUEST:\n";
  49         $packet->print;
  50
  51         $packet->header->qr(1);
  52
  53         my @questions = $packet->question;
  54         my $qname = $questions[0]->qname;
  55         my $qtype = $questions[0]->qtype;
  56
  57         if ($qname eq "cname1.example.com") {
  58                 # Data for the "cname + other data / 1" test
  59                 $packet->push("answer", new Net::DNS::RR("cname1.example.com 300 CNAME cname1.example.com"));
  60                 $packet->push("answer", new Net::DNS::RR("cname1.example.com 300 A 1.2.3.4"));
  61         } elsif ($qname eq "cname2.example.com") {
  62                 # Data for the "cname + other data / 2" test: same RRs in opposite order
  63                 $packet->push("answer", new Net::DNS::RR("cname2.example.com 300 A 1.2.3.4"));
  64                 $packet->push("answer", new Net::DNS::RR("cname2.example.com 300 CNAME cname2.example.com"));
  65         } elsif ($qname eq "www.example.org" || $qname eq "www.example.net" ||
  66                  $qname eq "badcname.example.org" ||
  67                  $qname eq "goodcname.example.org" ||
  68                  $qname eq "foo.baddname.example.org" ||
  69                  $qname eq "foo.gooddname.example.org") {
  70                 # Data for address/alias filtering.
  71                 $packet->header->aa(1);
  72                 if ($qtype eq "A") {
  73                         $packet->push("answer",
  74                                       new Net::DNS::RR($qname .
  75                                                        " 300 A 192.0.2.1"));
  76                 } elsif ($qtype eq "AAAA") {
  77                         $packet->push("answer",
  78                                       new Net::DNS::RR($qname .
  79                                                 " 300 AAAA 2001:db8:beef::1"));
  80                 }
  81         } elsif ($qname eq "badcname.example.net" ||
  82                  $qname eq "goodcname.example.net") {
  83                 # Data for CNAME/DNAME filtering.  We need to make one-level
  84                 # delegation to avoid automatic acceptance for subdomain aliases
  85                 $packet->push("authority", new Net::DNS::RR("example.net 300 NS ns.example.net"));
  86                 $packet->push("additional", new Net::DNS::RR("ns.example.net 300 A 10.53.0.3"));
  87         } elsif ($qname =~ /sub\.example\.org/) {
  88                 # Data for CNAME/DNAME filtering.  The final answers are
  89                 # expected to be accepted regardless of the filter setting.
  90                 $packet->push("authority", new Net::DNS::RR("sub.example.org 300 NS ns.sub.example.org"));
  91                 $packet->push("additional", new Net::DNS::RR("ns.sub.example.org 300 A 10.53.0.3"));
  92         } else {
  93                 # Data for the "bogus referrals" test
  94                 $packet->push("authority", new Net::DNS::RR("below.www.example.com 300 NS ns.below.www.example.com"));
  95                 $packet->push("additional", new Net::DNS::RR("ns.below.www.example.com 300 A 10.53.0.3"));
  96         }
  97
  98         $sock->send($packet->data);
  99
 100         print "RESPONSE:\n";
 101         $packet->print;
 102         print "\n";
 103 }