#!/usr/bin/perl # # Copyright (C) 2011 Internet Systems Consortium, Inc. ("ISC") # # Permission to use, copy, modify, and/or distribute this software for any # purpose with or without fee is hereby granted, provided that the above # copyright notice and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY # AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, # INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM # LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE # OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR # PERFORMANCE OF THIS SOFTWARE. # $Id: packet.pl,v 1.2 2011-04-15 01:02:08 each Exp $ # 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
] [-p ] [-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;