#!/usr/bin/perl # # $Id: icmp-mask.pl,v 1.2.2.7 2005/05/22 19:09:31 gomor Exp $ # use strict; use warnings; use Getopt::Std; my %opts; getopts('i:I:d:v', \%opts); die "Usage: icmp-mask.pl -i dstIp [-I srcIp] [-d device] [-v]\n" unless $opts{i}; use Net::Pkt; $Env->dev($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; } }