#!/usr/bin/perl
#
# $Id: icmp-mask.pl 1640 2009-11-09 17:58:27Z gomor $
#
use strict;
use warnings;
use Getopt::Std;
my %opts;
getopts('i:I:d:v', \%opts);
die "Usage: $0 -i dstIp [-I srcIp] [-d device] [-v]\n"
unless $opts{i};
use Net::Packet;
$Env->dev($opts{d}) if $opts{d};
$Env->ip ($opts{I}) if $opts{I};
$Env->debug(3) if $opts{v};
my $ip = Net::Packet::IPv4->new(
protocol => NP_IPv4_PROTOCOL_ICMPv4,
dst => $opts{i},
);
my $mask = Net::Packet::ICMPv4->new(
type => NP_ICMPv4_TYPE_ADDRESS_MASK_REQUEST,
);
my $frame = Net::Packet::Frame->new(l3 => $ip, l4 => $mask);
$frame->send;
until ($Env->dump->timeout) {
if ($frame->recv) {
print "Reply:\n";
print $frame->reply->l3->print, "\n";
print $frame->reply->l4->print, "\n";
last;
}
}
$Env->dump->stop;
$Env->dump->clean;