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# $Id: HeloUnqualified.pm,v 1.4 2004/02/26 19:24:52 tvierling Exp $
#
# Copyright (c) 2002-2004 Todd Vierling <tv@pobox.com> <tv@duh.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the author nor the names of contributors may be used
# to endorse or promote products derived from this software without specific
# prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
package Mail::Milter::Module::HeloUnqualified;
use 5.006;
use base Exporter;
use base Mail::Milter::Object;
use strict;
use warnings;
use Sendmail::Milter 0.18; # get needed constants
our $VERSION = '0.03';
=pod
=head1 NAME
Mail::Milter::Module::HeloUnqualified - milter to check for an unqualified HELO name
=head1 SYNOPSIS
use Mail::Milter::Module::HeloUnqualified;
my $milter = new Mail::Milter::Module::HeloUnqualified([EXCEPT]);
my $milter2 = &HeloUnqualified([EXCEPT]); # convenience
=head1 DESCRIPTION
This milter module rejects any domain name that HELOs without a dot, and
which is not an IPv4/IPv6 literal. Whether or not the HELO value
corresponds to the connecting host is not checked by this module.
If the EXCEPT argument is supplied, it should be a regex enclosed in a
string which will be exempted from this check. Commonly, '^localhost' is
excepted.
=cut
our @EXPORT = qw(&HeloUnqualified);
sub HeloUnqualified {
new Mail::Milter::Module::HeloUnqualified(@_);
}
sub new ($;$) {
my $this = Mail::Milter::Object::new(shift);
my $except = shift;
$this->{_except} = qr/$except/i if defined($except);
$this;
}
sub helo_callback {
my $this = shift;
my $ctx = shift;
my $helo = shift;
if (($helo !~ /\./) && ($helo !~ /^\[.*\]$/) &&
!(defined($this->{_except}) && $helo =~ $this->{_except})) {
$ctx->setreply("554", "5.7.1", "HELO/EHLO $helo: command rejected: domain name not qualified");
return SMFIS_REJECT;
}
SMFIS_ACCEPT;
}
1;
__END__
=head1 AUTHOR
Todd Vierling, E<lt>tv@duh.orgE<gt> E<lt>tv@pobox.comE<gt>
=head1 SEE ALSO
L<Mail::Milter::Object>
=cut
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