/**
* Connects to the IMAP server.
*
* @throws Horde_Imap_Client_Exception
*/
protected function _connect()
{
if (!is_null($this->_stream)) {
return;
}
if (!empty($this->_params['secure']) && !extension_loaded('openssl')) {
throw new InvalidArgumentException('Secure connections require the PHP openssl extension.');
}
switch ($this->_params['secure']) {
case 'ssl':
case 'sslv2':
case 'sslv3':
$conn = $this->_params['secure'] . '://';
$this->_isSecure = true;
break;
case 'tls':
default:
$conn = 'tcp://';
break;
}
$this->_stream = @stream_socket_client($conn . $this->_params['hostspec'] . ':' . $this->_params['port'], $error_number, $error_string, $this->_params['timeout']);
if ($this->_stream === false) {
$this->_stream = null;
$this->_isSecure = false;
$e = new Horde_Imap_Client_Exception(Horde_Imap_Client_Translation::t("Error connecting to mail server."), Horde_Imap_Client_Exception::SERVER_CONNECT);
$e->details = sprintf("[%u] %s", $error_number, $error_string);
throw $e;
}
stream_set_timeout($this->_stream, $this->_params['timeout']);
// If we already have capability information, don't re-set with
// (possibly) limited information sent in the inital banner.
if (isset($this->_init['capability'])) {
$this->_temp['no_cap'] = true;
}
/* Get greeting information. This is untagged so we need to specially
* deal with it here. */
try {
$this->_getLine();
} catch (Horde_Imap_Client_Exception_ServerResponse $e) {
if ($e->status == Horde_Imap_Client_Interaction_Server::BYE) {
/* Server is explicitly rejecting our connection (RFC 3501
* [7.1.5]). */
$e->setMessage(Horde_Imap_Client_Translation::t("Server rejected connection."));
$e->setCode(Horde_Imap_Client_Exception::SERVER_CONNECT);
}
throw $e;
}
// Check for IMAP4rev1 support
if (!$this->queryCapability('IMAP4REV1')) {
throw new Horde_Imap_Client_Exception(Horde_Imap_Client_Translation::t("The mail server does not support IMAP4rev1 (RFC 3501)."), Horde_Imap_Client_Exception::SERVER_CONNECT);
}
// Set language if NOT using imapproxy
if (empty($this->_init['imapproxy'])) {
if ($this->queryCapability('XIMAPPROXY')) {
$this->_setInit('imapproxy', true);
} else {
$this->setLanguage();
}
}
// If pre-authenticated, we need to do all login tasks now.
if (!empty($this->_temp['preauth'])) {
$this->login();
}
}
