##    lpd.pm: Fwctl service module to handle the Berkeley Line Printer protocol.##    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::lpd;use strict;use Fwctl::RuleSet qw(:tcp_rulesets :masq);use IPChains;sub new {  my $proto = shift;  my $class = ref $proto || $proto;  bless {}, $class;}sub prototypes {  my ($self,$target,$options) = @_;  # Check for printer service  my $local_ports = $options->{local_port} || "512:1023";  my $port	  = getservbyname "printer", 'tcp' || "515";  # Build prototypes  (   IPChains->new(		 Rule	    => $target,		 Prot	    => 'tcp',		 SourcePort => $local_ports,		 DestPort   => $port,		 %{$options->{ipchains}},		),  );}sub block_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  my ($lpd,$stderr) = $self->prototypes( $target, $options );  block_tcp_ruleset( $lpd,	$src, $src_if, $dst, $dst_if );}sub accept_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  my ($lpd,$stderr) = $self->prototypes( $target, $options );  my $masq = defined $options->{portfw} ? PORTFW :    $options->{masq} ? MASQ : NOMASQ;  accept_tcp_ruleset( $lpd, $src, $src_if, $dst, $dst_if,		      $masq, $options->{portfw} );}sub account_rules {  my $self = shift;  my ( $target, $src, $src_if, $dst, $dst_if, $options ) = @_;  my ($lpd,$stderr) = $self->prototypes( $target, $options );  my $masq = defined $options->{portfw} ? PORTFW :    $options->{masq} ? MASQ : NOMASQ;  acct_tcp_ruleset( $lpd, $src, $src_if, $dst, $dst_if, $masq );}sub valid_options {  my  $self = shift;  ( "local_port=s" );}1;=pod=head1 NAMEFwctl::Services::lpd - Fwctl module to handle the Berkeley Line Printer		       protocol.=head1 SYNOPSIS    accept   lpd -src INTERNAL_NET -dst PRINTER=head1 DESCRIPTIONThe lpd modules handles the LP protocol. It permits a tcp connection fromthe privileged 512 through 1023 to the printer port (515). You can usethe local_port option to specifies another range of port.=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