/usr/share/perl5/Net/Server/Mail/LMTP.pm is in libnet-server-mail-perl 0.23-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use 5.006;
use strict;
use base qw(Net::Server::Mail::ESMTP);
our $VERSION = "0.23";
=pod
=head1 NAME
Net::Server::Mail::LMTP - A module to implement the LMTP protocol
=head1 SYNOPSIS
use Net::Server::Mail::LMTP;
my @local_domains = qw(example.com example.org);
my $server = IO::Socket::INET->new( Listen => 1, LocalPort => 25 );
my $conn;
while($conn = $server->accept)
{
my $esmtp = Net::Server::Mail::LMTP->new( socket => $conn );
# adding some handlers
$esmtp->set_callback(RCPT => \&validate_recipient);
$esmtp->set_callback(DATA => \&queue_message);
$esmtp->process();
$conn->close();
}
sub validate_recipient
{
my($session, $recipient) = @_;
my $domain;
if($recipient =~ /@(.*)>\s*$/)
{
$domain = $1;
}
if(not defined $domain)
{
return(0, 513, 'Syntax error.');
}
elsif(not(grep $domain eq $_, @local_domains))
{
return(0, 554, "$recipient: Recipient address rejected: Relay access denied");
}
return(1);
}
sub queue_message
{
my($session, $data) = @_;
my $sender = $session->get_sender();
my @recipients = $session->get_recipients();
return(0, 554, 'Error: no valid recipients')
unless(@recipients);
my $msgid = add_queue($sender, \@recipients, $data)
or return(0);
return(1, 250, "message queued $msgid");
}
=head1 DESCRIPTION
This class implement the LMTP (RFC 2033) protocol.
This class inherit from Net::Server::Mail::ESMTP. Please see
L<Net::Server::Mail::ESMTP> for documentation of common methods.
=cut
sub init {
my ( $self, @args ) = @_;
my $rv = $self->SUPER::init(@args);
return $rv unless $rv eq $self;
$self->undef_verb('HELO');
$self->undef_verb('EHLO');
$self->def_verb( LHLO => 'lhlo' );
# Required by RFC
$self->register('Net::Server::Mail::ESMTP::PIPELINING');
return $self;
}
sub get_protoname {
return 'LMTP';
}
=pod
=head1 EVENTS
Descriptions of callback who's can be used with set_callback
method. All handle takes the Net::Server::Mail::ESMTP object as first
argument and specific callback's arguments.
=head2 LHLO
Same as ESMTP EHLO, please see L<Net::Server::Mail::ESMTP>.
=cut
sub lhlo {
my ( $self, $hostname ) = @_;
unless ( defined $hostname && length $hostname ) {
$self->reply( 501, 'Syntax error in parameters or arguments' );
return;
}
my $response = $self->get_hostname . ' Service ready';
my @extends;
foreach my $extend ( $self->get_extensions ) {
push( @extends, join( ' ', $extend->keyword, $extend->parameter ) );
}
$self->extend_mode(1);
$self->make_event(
name => 'LHLO',
arguments => [ $hostname, \@extends ],
on_success => sub {
# according to the RFC, LHLO ensures "that both the SMTP client
# and the SMTP server are in the initial state"
$self->{extend_mode} = 1;
$self->step_reverse_path(1);
$self->step_forward_path(0);
$self->step_maildata_path(0);
},
success_reply => [ 250, [ $response, @extends ] ],
);
return;
}
=pod
=head2 DATA
Overide the default DATA event by a per recipient response. It will
be called for each recipients with data (in a scalar reference) as
first argument followed by the current recipient.
=cut
sub data {
my ( $self, $args ) = @_;
unless ( ref $self->step_forward_path eq 'ARRAY'
and @{ $self->step_forward_path } )
{
$self->reply( 503, 'Bad sequence of commands' );
return;
}
$self->SUPER::data($args);
}
sub data_finished {
my ( $self, $more_data ) = @_;
my @recipients = @{ $self->step_forward_path || [] };
$self->{continuous_reply} = 1;
while ( my $forward_path = shift @recipients ) {
$self->{continuous_reply} = 0 unless @recipients;
$self->make_event(
name => 'DATA',
arguments => [ \$self->{_data}, $forward_path ],
success_reply => [ 250, 'Ok' ],
failure_reply => [ 550, "$forward_path Failed" ],
);
}
$self->{continuous_reply} = 0;
# reinitiate the connection
$self->step_reverse_path(1);
$self->step_forward_path(0);
$self->step_maildata_path(0);
# if more data, handle it
if ($more_data) {
return $self->{process_operation}( $self, $more_data );
}
else {
return;
}
}
sub reply {
my ( $self, $code, $msg ) = @_;
if ( not ref $msg and $self->{continuous_reply} ) {
my $out = $self->{out};
print $out "$code-$msg\r\n";
}
else {
$self->SUPER::reply( $code, $msg );
}
}
=pod
=head1 SEE ALSO
Please, see L<Net::Server::Mail>, L<Net::Server::Mail::SMTP>
and L<Net::Server::Mail::ESMTP>.
=head1 AUTHOR
Olivier Poitrey E<lt>rs@rhapsodyk.netE<gt>
=head1 AVAILABILITY
Available on CPAN.
anonymous Git repository:
git clone git://github.com/rs/net-server-mail.git
Git repository on the web:
L<https://github.com/rs/net-server-mail>
=head1 BUGS
Please use CPAN system to report a bug (http://rt.cpan.org/).
=head1 LICENCE
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
=head1 COPYRIGHT
Copyright (C) 2002 - Olivier Poitrey, 2007 - Xavier Guimard
=cut
1;
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