##    icmp.pm: Fwctl service module to handle arbitrery ICMP packets.##    This file is part of Fwctl.##    Author: Francis J. Lacoste <francis@iNsu.COM>##    Copyright (c) 1999,2000 iNsu Innovations Inc.##    This program is free software; you can redistribute it and/or modify#    it under the terms of the GNU General Public License as published by#    the Free Software Foundation; either version 2 of the License, or#    (at your option) any later version.#package Fwctl::Services::icmp_pkt;use strict;use Fwctl::RuleSet qw(:ip_rulesets :masq);use IPChains;sub new {  my $proto = shift;  my $class = ref $proto || $proto;  bless {}, $class;}sub prototypes {  my ($self,$target,$options) = @_;  (   IPChains->new(		 Rule	    => $target,		 Prot	    => 'icmp',		 ICMP	    => $options->{code},		 %{$options->{ipchains}},		),  );}sub block_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  # Build prototype rule  my ($msg) = $self->prototypes( $target, $options );  block_ip_ruleset( $msg, $src, $src_if, $dst, $dst_if );}sub accept_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  # Build prototype rule  my ($msg) = $self->prototypes( $target, $options );  accept_ip_ruleset( $msg, $src, $src_if, $dst, $dst_if,		    $options->{masq} ? MASQ : NOMASQ		  );}sub account_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  # Build prototype rule  my ($msg) = $self->prototypes( $target, $options );  acct_ip_ruleset( $msg, $src, $src_if, $dst, $dst_if,		   $options->{masq} ? MASQ : NOMASQ		  );}sub valid_options {  ( "code=s" );}1;=pod=head1 NAMEFwctl::Services::icmp_pkt - Fwctl module to handle arbitrary ICMP packet.=head1 SYNOPSIS    accept icmp_pkt -src INT_IP -dst INT_NET --code redirect=head1 DESCRIPTIONThis module can be use to add rules for arbitrary ICMP packets. Use the --code option to specify the ICMP code of the packet to build the rulesfor.=head1 AUTHORFrancis J. Lacoste <francis.lacoste@iNsu.COM>=head1 COPYRIGHTCopyright (c) 1999,2000 iNsu Innovations Inc.All rights reserved.This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2 of the License, or(at your option) any later version.=head1 SEE ALSOfwctl(8) Fwctl(3) Fwctl::RuleSet(3)=cut