##    udp_pkt.pm - Fwctl modules that will add rules to let through one udp packets.##    This file is part of Fwctl.##    Author: Francis J. Lacoste <francis.lacoste@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::udp_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) = @_;  my $local_port = $options->{local_port} || "1024:65535";  my $port	 = $options->{port}       || "1:65535";  # Build prototype rule  (   IPChains->new(		 Rule	    => $target,		 Prot	    => 'udp',		 SourcePort => $local_port,		 DestPort   => $port,		 %{$options->{ipchains}},		),  );}sub block_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  my ($fw) = $self->prototypes( $target, $options );  block_ip_ruleset( $fw, $src, $src_if, $dst, $dst_if );}sub accept_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  my ($fw) = $self->prototypes( $target, $options );  my $masq = defined $options->{portfw} ? PORTFW :    $options->{masq} ? MASQ : NOMASQ;  accept_ip_ruleset( $fw, $src, $src_if, $dst, $dst_if,		     $masq, $options->{portfw} );}sub account_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  my ($fw) = $self->prototypes( $target, $options );  my $masq = defined $options->{portfw} ? PORTFW :    $options->{masq} ? MASQ : NOMASQ;  acct_ip_ruleset( $fw, $src, $src_if, $dst, $dst_if, $masq );}sub valid_options {  my  $self = shift;  ( "local_port=s", "port=s" );}1;=pod=head1 NAMEFwctl::Services::udp_pkt - Fwctl module to hande unidirectional UDP packets.=head1 SYNOPSIS    accept   udp_pkt -src ROUTER -dst LOGGER --local_port 514 --port 514=head1 DESCRIPTIONThis module will add rules to the firewall for unidrectional UDP traffic.=head1 OPTIONSIn addition to the standard options, it accepts the following ones.=over=item --local_portThis is the source port of the udp packet.=item --portThis is the destination port of the udp packet.=back=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