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# $Id: HeaderRegex.pm,v 1.5 2004/04/12 14:21:41 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::HeaderRegex;
use 5.006;
use base Exporter;
use base Mail::Milter::Object;
use strict;
use warnings;
use Carp;
use Sendmail::Milter 0.18; # get needed constants
our $VERSION = '0.03';
=pod
=head1 NAME
Mail::Milter::Module::HeaderRegex - milter to accept/reject messages with certain headers
=head1 SYNOPSIS
use Mail::Milter::Module::HeaderRegex;
my $milter = new Mail::Milter::Module::HeaderRegex('^Foo: ');
my $milter2 = &HeaderRegex('^Foo: Bar'); # convenience
=head1 DESCRIPTION
This milter module rejects messages at DATA phase if one of the message's
headers matches user-supplied regular expressions.
=head1 METHODS
=over 4
=cut
our @EXPORT = qw(&HeaderRegex);
sub HeaderRegex {
new Mail::Milter::Module::HeaderRegex(@_);
}
=pod
=item new(REGEX[, ...])
Accepts one or more regular expressions, as strings or qr// precompiled
regexes. They are tested in sequence, and the first match terminates
checking.
=cut
sub new ($$;@) {
my $this = Mail::Milter::Object::new(shift);
$this->{_message} = 'Malformed or invalid header %H: in message';
croak 'new HeaderRegex: no regexes supplied' unless scalar @_;
$this->{_regexes} = [ map qr/$_/i, @_ ];
$this;
}
=pod
=item set_message(MESSAGE)
Sets the message used when rejecting messages. This string may contain the
substring C<%H>, which will be replaced by the matching header name.
This method returns a reference to the object itself, allowing this method
call to be chained.
=cut
sub set_message ($$) {
my $this = shift;
$this->{_message} = shift;
$this;
}
sub header_callback {
my $this = shift;
my $ctx = shift;
my $hname = shift;
my $header = "$hname: ".(shift);
foreach my $rx (@{$this->{_regexes}}) {
if ($header =~ $rx) {
my $msg = $this->{_message};
if (defined($msg)) {
$msg =~ s/%H/$hname/g;
$ctx->setreply('554', '5.7.1', $msg);
}
return SMFIS_REJECT;
}
}
SMFIS_CONTINUE;
}
1;
__END__
=back
=head1 AUTHOR
Todd Vierling, E<lt>tv@duh.orgE<gt> E<lt>tv@pobox.comE<gt>
=head1 SEE ALSO
L<Mail::Milter::Object>
=cut
|
