#!/usr/bin/perl # # $Id: icmp-redirect.pl 1640 2009-11-09 17:58:27Z gomor $ # use strict; use warnings; use Getopt::Std; my %opts; getopts('i:d:I:g:v', \%opts); die "Usage: $0 -i dstIp -g gateway [-d device] [-I srcIp] [-v]\n" unless $opts{i} && $opts{g}; use Net::Packet; $Env->dev($opts{d}) if $opts{d}; $Env->ip ($opts{I}) if $opts{I}; $Env->debug(3) if $opts{v}; $Env->noFrameAutoDump(1); my $ip = Net::Packet::IPv4->new( protocol => NP_IPv4_PROTOCOL_ICMPv4, dst => $opts{i}, ); my $iperror = Net::Packet::IPv4->new(dst => "192.168.0.1"); my $tcperror = Net::Packet::TCP->new(dst => 6666); my $error = Net::Packet::Frame->new(l3 => $iperror, l4 => $tcperror); my $icmp = Net::Packet::ICMPv4->new( type => NP_ICMPv4_TYPE_REDIRECT, code => NP_ICMPv4_CODE_FOR_HOST, gateway => $opts{g}, error => $error, ); my $frame = Net::Packet::Frame->new( l3 => $ip, l4 => $icmp, ); $frame->send;