1#!/usr/bin/perl 2# 3# $Id: icmp-redirect.pl 1640 2009-11-09 17:58:27Z gomor $ 4# 5use strict; 6use warnings; 7 8use Getopt::Std; 9my %opts; 10getopts('i:d:I:g:v', \%opts); 11 12die "Usage: $0 -i dstIp -g gateway [-d device] [-I srcIp] [-v]\n" 13 unless $opts{i} && $opts{g}; 14 15use Net::Packet; 16 17$Env->dev($opts{d}) if $opts{d}; 18$Env->ip ($opts{I}) if $opts{I}; 19$Env->debug(3) if $opts{v}; 20$Env->noFrameAutoDump(1); 21 22my $ip = Net::Packet::IPv4->new( 23 protocol => NP_IPv4_PROTOCOL_ICMPv4, 24 dst => $opts{i}, 25); 26 27my $iperror = Net::Packet::IPv4->new(dst => "192.168.0.1"); 28 29my $tcperror = Net::Packet::TCP->new(dst => 6666); 30 31my $error = Net::Packet::Frame->new(l3 => $iperror, l4 => $tcperror); 32 33my $icmp = Net::Packet::ICMPv4->new( 34 type => NP_ICMPv4_TYPE_REDIRECT, 35 code => NP_ICMPv4_CODE_FOR_HOST, 36 gateway => $opts{g}, 37 error => $error, 38); 39 40my $frame = Net::Packet::Frame->new( 41 l3 => $ip, 42 l4 => $icmp, 43); 44 45$frame->send; 46