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#!/usr/bin/perl -w
#
# Olivier Poitrey <rs@rhapsodyk.net>
# 8th november 2002
#
# smtp-gateway.pl: A simple SMTP gateway example.
require 5.006;
use strict;
use POSIX qw(setsid);
use Getopt::Std;
use IO::Socket;
use IO::Select;
use Net::Server::Mail::ESMTP;
use Net::SMTP;
my %opts = (p => 25, h => 'localhost', r => '', d => 0);
getopts('dp:h:r:', \%opts);
my $remote = $opts{r};
unless($remote)
{
print STDERR "Needs a remote server (-r option)\n";
exit 1;
}
unless($opts{d})
{
# become a daemon
fork and exit;
setsid;
}
# start to listen
my $server = IO::Socket::INET->new(
Listen => 1,
LocalPort => $opts{p},
LocalHost => $opts{h},
) or die "can't listen $opts{h}:$opts{p}";
my $select = IO::Select->new($server);
my(@ready, $fh, %session_pool);
while(@ready = $select->can_read)
{
foreach $fh (@ready)
{
if($fh == $server)
{
my $new = $server->accept();
$new->blocking(0);
my $smtpout = Net::SMTP->new( $remote, Debug => $opts{d} ) or do
{
$new->print("Service unavailable\n");
$new->close();
};
my $smtpin = Net::Server::Mail::ESMTP->new( socket => $new )
or die "can't start server on port $opts{p}";
$smtpin->register('Net::Server::Mail::ESMTP::PIPELINING');
$smtpin->register('Net::Server::Mail::ESMTP::8BITMIME');
$smtpin->set_callback(HELO => \&gate_helo, $smtpout);
$smtpin->set_callback(MAIL => \&gate_mail, $smtpout);
$smtpin->set_callback(RCPT => \&gate_rcpt, $smtpout);
$smtpin->set_callback('DATA-INIT' => \&gate_datainit, $smtpout);
$smtpin->set_callback('DATA-PART' => \&gate_datapart, $smtpout);
$smtpin->set_callback(DATA => \&gate_dataend, $smtpout);
$smtpin->set_callback(QUIT => \&gate_quit, $smtpout);
$smtpin->banner();
$session_pool{$new} = $smtpin;
$select->add($new);
}
else
{
my $operation = join '', <$fh>;
my $rv = $session_pool{$fh}->process_once($operation);
if(defined $rv)
{
$select->remove($fh);
delete $session_pool{$fh};
$fh->close();
}
}
}
}
sub gate_helo
{
# Net::SMTP send HELO by himself
return;
}
sub gate_mail
{
my($session, $address) = @_;
my $smtpout = $session->get_context();
return $smtpout->mail($address);
}
sub gate_rcpt
{
my($session, $address) = @_;
my $smtpout = $session->get_context();
return $smtpout->to($address);
}
sub gate_datainit
{
my($session) = @_;
my $smtpout = $session->get_context();
return $smtpout->data();
}
sub gate_datapart
{
my($session, $dataref) = @_;
my $smtpout = $session->get_context();
return $smtpout->datasend($$dataref);
}
sub gate_dataend
{
my($session, $dataref) = @_;
my $smtpout = $session->get_context();
return $smtpout->dataend();
}
sub gate_quit
{
my($session) = @_;
my $smtpout = $session->get_context();
return $smtpout->quit();
}
|
