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diff --git a/bin/tests/system/packet.pl b/bin/tests/system/packet.pl
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+#!/usr/bin/perl
+#
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# 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 http://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+# This is a tool for sending an arbitrary packet via UDP or TCP to an
+# arbitrary address and port. The packet is specified in a file or on
+# the standard input, in the form of a series of bytes in hexidecimal.
+# Whitespace is ignored, as is anything following a '#' symbol.
+#
+# For example, the following input would generate normal query for
+# isc.org/NS/IN":
+#
+# # QID:
+# 0c d8
+# # header:
+# 01 00 00 01 00 00 00 00 00 00
+# # qname isc.org:
+# 03 69 73 63 03 6f 72 67 00
+# # qtype NS:
+# 00 02
+# # qclass IN:
+# 00 01
+#
+# Note that we do not wait for a response for the server. This is simply
+# a way of injecting arbitrary packets to test server resposnes.
+#
+# Usage: packet.pl [-a <address>] [-p <port>] [-t (udp|tcp)] [filename]
+#
+# If not specified, address defaults to 127.0.0.1, port to 53, protocol
+# to udp, and file to stdin.
+#
+# XXX: Doesn't support IPv6 yet
+
+require 5.006.001;
+
+use strict;
+use Getopt::Std;
+use IO::File;
+use IO::Socket;
+
+sub usage {
+ print ("Usage: packet.pl [-a address] [-p port] [-t (tcp|udp)] [file]\n");
+ exit 1;
+}
+
+my %options={};
+getopts("a:p:t:", \%options);
+
+my $addr = "127.0.0.1";
+$addr = $options{a} if defined $options{a};
+
+my $port = 53;
+$port = $options{p} if defined $options{p};
+
+my $proto = "udp";
+$proto = lc $options{t} if defined $options{t};
+usage if ($proto !~ /^(udp|tcp)$/);
+
+my $file = "STDIN";
+if (@ARGV >= 1) {
+ my $filename = shift @ARGV;
+ open FH, "<$filename" or die "$filename: $!";
+ $file = "FH";
+}
+
+my $input = "";
+while (defined(my $line = <$file>) ) {
+ chomp $line;
+ $line =~ s/#.*$//;
+ $input .= $line;
+}
+
+$input =~ s/\s+//g;
+my $data = pack("H*", $input);
+my $len = length $data;
+
+my $output = unpack("H*", $data);
+print ("sending: $output\n");
+
+my $sock = IO::Socket::INET->new(PeerAddr => $addr, PeerPort => $port,
+ Proto => $proto,) or die "$!";
+
+my $bytes;
+if ($proto eq "udp") {
+ $bytes = $sock->send($data);
+} else {
+ $bytes = $sock->syswrite(pack("n", $len), 2);
+ $bytes += $sock->syswrite($data, $len);
+}
+
+print ("sent $bytes bytes to $addr:$port\n");
+$sock->close;
+close $file;