#!/usr/bin/perl
#
# $Id: arp-request.pl,v 1.2.2.8 2005/05/22 19:09:31 gomor Exp $
#
use strict;
use warnings;
use Getopt::Std;
my %opts;
getopts('i:I:M:d:vt', \%opts);
die "Usage: arp-request.pl -i dstIp [-I srcIp] [-M srcMac] [-d device] ".
"[-v] [-t timeout]\n"
unless $opts{i};
use Net::Pkt;
$Env->dev($opts{d}) if $opts{d};
$Env->ip ($opts{I}) if $opts{I};
$Env->mac($opts{M}) if $opts{M};
$Env->debug(3) if $opts{v};
my $eth = Net::Packet::ETH->new(
type => NP_ETH_TYPE_ARP,
);
my $arp = Net::Packet::ARP->new(
opCode => NP_ARP_OPCODE_REQUEST,
dstIp => $opts{i},
);
my $frame = Net::Packet::Frame->new(l2 => $eth, l3 => $arp);
my $dump = Net::Packet::Dump->new(
filter => $frame->getFilter,
timeoutOnNext => $opts{t} ? $opts{t} : 3,
);
print "Request:\n";
print $frame->l2->print, "\n";
print $frame->l3->print, "\n";
print "padding: ", unpack('H*', $frame->padding), "\n";
$frame->send;
until ($dump->timeout) {
if ($frame->recv) {
print "\nReply:\n";
print $frame->reply->l2->print, "\n";
print $frame->reply->l3->print, "\n";
print "padding: ", unpack('H*', $frame->reply->padding), "\n";
print "\n", $frame->reply->l3->srcIp, " is-at ", $frame->reply->l3->src,
"\n";
last;
}
}