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60 lines
1.7 KiB
Perl
60 lines
1.7 KiB
Perl
#!/usr/bin/perl
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#
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# Copyright (C) 2000, 2001 Internet Software Consortium.
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
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# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
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# INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
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# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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# FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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# $Id: ans.pl,v 1.5 2001/01/09 21:44:33 bwelling Exp $
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#
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# Ad hoc name server
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#
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use IO::File;
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use IO::Socket;
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use Net::DNS;
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use Net::DNS::Packet;
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my $sock = IO::Socket::INET->new(LocalAddr => "10.53.0.3",
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LocalPort => 5300, Proto => "udp") or die "$!";
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my $pidf = new IO::File "ans.pid", "w" or die "cannot write pid file: $!";
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print $pidf "$$\n";
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$pidf->close;
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sub rmpid { unlink "ans.pid"; exit 1; };
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$SIG{INT} = \&rmpid;
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$SIG{TERM} = \&rmpid;
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for (;;) {
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$sock->recv($buf, 512);
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print "**** request from " , $sock->peerhost, " port ", $sock->peerport, "\n";
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my ($packet, $err) = new Net::DNS::Packet(\$buf, 0);
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$err and die $err;
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print "REQUEST:\n";
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$packet->print;
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$packet->header->qr(1);
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$packet->push("answer", new Net::DNS::RR("www.example.com 300 A 1.2.3.4"));
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$sock->send($packet->data);
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print "RESPONSE:\n";
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$packet->print;
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print "\n";
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}
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