1#!/usr/bin/perl 2# 3# $Id: icmp-mask.pl 1640 2009-11-09 17:58:27Z gomor $ 4# 5use strict; 6use warnings; 7 8use Getopt::Std; 9my %opts; 10getopts('i:I:d:v', \%opts); 11 12die "Usage: $0 -i dstIp [-I srcIp] [-d device] [-v]\n" 13 unless $opts{i}; 14 15use Net::Packet; 16 17$Env->dev($opts{d}) if $opts{d}; 18$Env->ip ($opts{I}) if $opts{I}; 19$Env->debug(3) if $opts{v}; 20 21my $ip = Net::Packet::IPv4->new( 22 protocol => NP_IPv4_PROTOCOL_ICMPv4, 23 dst => $opts{i}, 24); 25 26my $mask = Net::Packet::ICMPv4->new( 27 type => NP_ICMPv4_TYPE_ADDRESS_MASK_REQUEST, 28); 29 30my $frame = Net::Packet::Frame->new(l3 => $ip, l4 => $mask); 31 32$frame->send; 33 34until ($Env->dump->timeout) { 35 if ($frame->recv) { 36 print "Reply:\n"; 37 print $frame->reply->l3->print, "\n"; 38 print $frame->reply->l4->print, "\n"; 39 last; 40 } 41} 42 43$Env->dump->stop; 44$Env->dump->clean; 45