?? lpd.pm
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## 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
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