1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
#!/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;
|
