external/bsd/bind/dist/bin/tests/system/resolver/ans3/ans.pl

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (C) 2004, 2007, 2009, 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 1.12 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 $sock = IO::Socket::INET->new(LocalAddr => "10.53.0.3",
  30    LocalPort => 5300, Proto => "udp") or die "$!";
  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         $packet->header->aa(1);
  61
  62         my @questions = $packet->question;
  63         my $qname = $questions[0]->qname;
  64
  65         if ($qname eq "badcname.example.net") {
  66                 $packet->push("answer",
  67                               new Net::DNS::RR($qname .
  68                                        " 300 CNAME badcname.example.org"));
  69         } elsif ($qname eq "foo.baddname.example.net") {
  70                 $packet->push("answer",
  71                               new Net::DNS::RR("baddname.example.net" .
  72                                        " 300 DNAME baddname.example.org"));
  73         } elsif ($qname eq "foo.gooddname.example.net") {
  74                 $packet->push("answer",
  75                               new Net::DNS::RR("gooddname.example.net" .
  76                                        " 300 DNAME gooddname.example.org"));
  77         } elsif ($qname eq "goodcname.example.net") {
  78                 $packet->push("answer",
  79                               new Net::DNS::RR($qname .
  80                                        " 300 CNAME goodcname.example.org"));
  81         } elsif ($qname eq "cname.sub.example.org") {
  82                 $packet->push("answer",
  83                               new Net::DNS::RR($qname .
  84                                        " 300 CNAME ok.sub.example.org"));
  85         } elsif ($qname eq "ok.sub.example.org") {
  86                 $packet->push("answer",
  87                               new Net::DNS::RR($qname . " 300 A 192.0.2.1"));
  88         } elsif ($qname eq "www.dname.sub.example.org") {
  89                 $packet->push("answer",
  90                               new Net::DNS::RR("dname.sub.example.org" .
  91                                        " 300 DNAME ok.sub.example.org"));
  92         } elsif ($qname eq "www.ok.sub.example.org") {
  93                 $packet->push("answer",
  94                               new Net::DNS::RR($qname . " 300 A 192.0.2.1"));
  95         } else {
  96                 $packet->push("answer", new Net::DNS::RR("www.example.com 300 A 1.2.3.4"));
  97         }
  98
  99         $sock->send($packet->data);
 100
 101         print "RESPONSE:\n";
 102         $packet->print;
 103         print "\n";
 104 }