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<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_smtp.inc |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2005-2007, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Provide SMTP functionality using socket connections |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id: rcube_smtp.inc 970 2008-01-29 20:07:12Z till $
*/
/**
* SMTP delivery functions
*
* @package Mail
*/
// include required PEAR classes
require_once('Net/SMTP.php');
// define headers delimiter
define('SMTP_MIME_CRLF', "\r\n");
$SMTP_CONN = null;
/**
* Function for sending mail using SMTP.
*
* @param string Sender e-Mail address
*
* @param mixed Either a comma-seperated list of recipients
* (RFC822 compliant), or an array of recipients,
* each RFC822 valid. This may contain recipients not
* specified in the headers, for Bcc:, resending
* messages, etc.
*
* @param mixed The message headers to send with the mail
* Either as an associative array or a finally
* formatted string
*
* @param string The full text of the message body, including any Mime parts, etc.
*
* @return bool Returns TRUE on success, or FALSE on error
*/
function smtp_mail($from, $recipients, &$headers, &$body, &$response)
{
global $SMTP_CONN, $CONFIG;
$smtp_timeout = null;
$smtp_host = $CONFIG['smtp_server'];
$smtp_port = is_numeric($CONFIG['smtp_port']) ? $CONFIG['smtp_port'] : 25;
$smtp_host_url = parse_url($CONFIG['smtp_server']);
// overwrite port
if ($smtp_host_url['host'] && $smtp_host_url['port'])
{
$smtp_host = $smtp_host_url['host'];
$smtp_port = $smtp_host_url['port'];
}
// re-write smtp host
if ($smtp_host_url['host'] && $smtp_host_url['scheme'])
$smtp_host = sprintf('%s://%s', $smtp_host_url['scheme'], $smtp_host_url['host']);
// create Net_SMTP object and connect to server
if (!is_object($smtp_conn))
{
$helo_host = empty($CONFIG['smtp_helo_host']) ? (empty($_SERVER['SERVER_NAME']) ? 'localhost' : $_SERVER['SERVER_NAME']) : $CONFIG['smtp_helo_host'];
$SMTP_CONN = new Net_SMTP($smtp_host, $smtp_port, $helo_host);
// set debugging
if ($CONFIG['debug_level'] & 8)
$SMTP_CONN->setDebug(TRUE);
// try to connect to server and exit on failure
$result = $SMTP_CONN->connect($smtp_timeout);
if (PEAR::isError($result))
{
$SMTP_CONN = null;
$response[] = "Connection failed: ".$result->getMessage();
return FALSE;
}
// attempt to authenticate to the SMTP server
if ($CONFIG['smtp_user'] && $CONFIG['smtp_pass'])
{
if (strstr($CONFIG['smtp_user'], '%u'))
$smtp_user = str_replace('%u', $_SESSION['username'], $CONFIG['smtp_user']);
else
$smtp_user = $CONFIG['smtp_user'];
if (strstr($CONFIG['smtp_pass'], '%p'))
$smtp_pass = str_replace('%p', decrypt_passwd($_SESSION['password']), $CONFIG['smtp_pass']);
else
$smtp_pass = $CONFIG['smtp_pass'];
$smtp_auth_type = empty($CONFIG['smtp_auth_type']) ? NULL : $CONFIG['smtp_auth_type'];
$result = $SMTP_CONN->auth($smtp_user, $smtp_pass, $smtp_auth_type);
if (PEAR::isError($result))
{
smtp_reset();
$response[] .= 'Authentication failure: ' . $result->getMessage() . ' (Code: ' . $result->getCode() . ')';
return FALSE;
}
}
}
// prepare message headers as string
if (is_array($headers))
{
$headerElements = smtp_prepare_headers($headers);
if (!$headerElements)
{
smtp_reset();
return FALSE;
}
list($from, $text_headers) = $headerElements;
}
else if (is_string($headers))
$text_headers = $headers;
else
{
smtp_reset();
$response[] .= "Invalid message headers";
return FALSE;
}
// exit if no from address is given
if (!isset($from))
{
smtp_reset();
$response[] .= "No From address has been provided";
return FALSE;
}
// set From: address
if (PEAR::isError($SMTP_CONN->mailFrom($from)))
{
smtp_reset();
$response[] .= "Failed to set sender '$from'";
return FALSE;
}
// prepare list of recipients
$recipients = smtp_parse_rfc822($recipients);
if (PEAR::isError($recipients))
{
smtp_reset();
return FALSE;
}
// set mail recipients
foreach ($recipients as $recipient)
{
if (PEAR::isError($SMTP_CONN->rcptTo($recipient)))
{
smtp_reset();
$response[] .= "Failed to add recipient '$recipient'";
return FALSE;
}
}
// Concatenate headers and body so it can be passed by reference to SMTP_CONN->data
// so preg_replace in SMTP_CONN->quotedata will store a reference instead of a copy.
// We are still forced to make another copy here for a couple ticks so we don't really
// get to save a copy in the method call.
$data = $text_headers . "\r\n" . $body;
// unset old vars to save data and so we can pass into SMTP_CONN->data by reference.
unset($text_headers, $body);
// Send the message's headers and the body as SMTP data.
if (PEAR::isError($SMTP_CONN->data($data)))
{
smtp_reset();
$response[] .= "Failed to send data";
return FALSE;
}
$response[] = join(': ', $SMTP_CONN->getResponse());
return TRUE;
}
/**
* Reset the global SMTP connection
* @access public
*/
function smtp_reset()
{
global $SMTP_CONN;
if (is_object($SMTP_CONN))
{
$SMTP_CONN->rset();
smtp_disconnect();
}
}
/**
* Disconnect the global SMTP connection and destroy object
* @access public
*/
function smtp_disconnect()
{
global $SMTP_CONN;
if (is_object($SMTP_CONN))
{
$SMTP_CONN->disconnect();
$SMTP_CONN = null;
}
}
/**
* Take an array of mail headers and return a string containing
* text usable in sending a message.
*
* @param array $headers The array of headers to prepare, in an associative
* array, where the array key is the header name (ie,
* 'Subject'), and the array value is the header
* value (ie, 'test'). The header produced from those
* values would be 'Subject: test'.
*
* @return mixed Returns false if it encounters a bad address,
* otherwise returns an array containing two
* elements: Any From: address found in the headers,
* and the plain text version of the headers.
* @access private
*/
function smtp_prepare_headers($headers)
{
$lines = array();
$from = null;
foreach ($headers as $key => $value)
{
if (strcasecmp($key, 'From') === 0)
{
$addresses = smtp_parse_rfc822($value);
if (is_array($addresses))
$from = $addresses[0];
// Reject envelope From: addresses with spaces.
if (strstr($from, ' '))
return FALSE;
$lines[] = $key . ': ' . $value;
}
else if (strcasecmp($key, 'Received') === 0)
{
$received = array();
if (is_array($value))
{
foreach ($value as $line)
$received[] = $key . ': ' . $line;
}
else
{
$received[] = $key . ': ' . $value;
}
// Put Received: headers at the top. Spam detectors often
// flag messages with Received: headers after the Subject:
// as spam.
$lines = array_merge($received, $lines);
}
else
{
// If $value is an array (i.e., a list of addresses), convert
// it to a comma-delimited string of its elements (addresses).
if (is_array($value))
$value = implode(', ', $value);
$lines[] = $key . ': ' . $value;
}
}
return array($from, join(SMTP_MIME_CRLF, $lines) . SMTP_MIME_CRLF);
}
/**
* Take a set of recipients and parse them, returning an array of
* bare addresses (forward paths) that can be passed to sendmail
* or an smtp server with the rcpt to: command.
*
* @param mixed Either a comma-seperated list of recipients
* (RFC822 compliant), or an array of recipients,
* each RFC822 valid.
*
* @return array An array of forward paths (bare addresses).
* @access private
*/
function smtp_parse_rfc822($recipients)
{
// if we're passed an array, assume addresses are valid and implode them before parsing.
if (is_array($recipients))
$recipients = implode(', ', $recipients);
$addresses = array();
$recipients = smtp_explode_quoted_str(",", $recipients);
reset($recipients);
while (list($k, $recipient) = each($recipients))
{
$a = explode(" ", $recipient);
while (list($k2, $word) = each($a))
{
if ((strpos($word, "@") > 0) && (strpos($word, "\"")===false))
{
$word = ereg_replace('^<|>$', '', trim($word));
if (in_array($word, $addresses)===false)
array_push($addresses, $word);
}
}
}
return $addresses;
}
/**
* @access private
*/
function smtp_explode_quoted_str($delimiter, $string)
{
$quotes=explode("\"", $string);
while ( list($key, $val) = each($quotes))
if (($key % 2) == 1)
$quotes[$key] = str_replace($delimiter, "_!@!_", $quotes[$key]);
$string=implode("\"", $quotes);
$result=explode($delimiter, $string);
while (list($key, $val) = each($result))
$result[$key] = str_replace("_!@!_", $delimiter, $result[$key]);
return $result;
}
?>
