@memu;
<?php
/*~ class.smtp.php
/**
* PHPMailer - PHP SMTP email transport class
* NOTE: Designed for use with PHP version 5 and up
* @package PHPMailer
* @author Andy Prevost
* @author Marcus Bointon
* @copyright 2004 - 2008 Andy Prevost
* @author Jim Jagielski
* @copyright 2010 - 2012 Jim Jagielski
* @license http://www.gnu.org/copyleft/lesser.html Distributed under the Lesser General Public License (LGPL)
*/
/**
* PHP RFC821 SMTP client
*
* Implements all the RFC 821 SMTP commands except TURN which will always return a not implemented error.
* SMTP also provides some utility methods for sending mail to an SMTP server.
* @author Chris Ryan
* @package PHPMailer
*/
class SMTP {
/**
* SMTP server port
* @var int
*/
public $SMTP_PORT = 465;
/**
* SMTP reply line ending (don't change)
* @var string
*/
public $CRLF = "\r\n";
/**
* Sets whether debugging is turned on
* @var bool
*/
public $do_debug; // the level of debug to perform
/**
* Sets the function/method to use for debugging output.
* Right now we only honor "echo" or "error_log"
* @var string
*/
public $Debugoutput = "echo";
/**
* Sets VERP use on/off (default is off)
* @var bool
*/
public $do_verp = false;
/**
* Sets the SMTP timeout value for reads, in seconds
* @var int
*/
public $Timeout = 15;
/**
* Sets the SMTP timelimit value for reads, in seconds
* @var int
*/
public $Timelimit = 30;
/**
* Sets the SMTP PHPMailer Version number
* @var string
*/
public $Version = '5.2.4';
/////////////////////////////////////////////////
// PROPERTIES, PRIVATE AND PROTECTED
/////////////////////////////////////////////////
/**
* @var resource The socket to the server
*/
private $smtp_conn;
/**
* @var string Error message, if any, for the last call
*/
private $error;
/**
* @var string The reply the server sent to us for HELO
*/
private $helo_rply;
/**
* Outputs debugging info via user-defined method
* @param string $str
*/
private function edebug($str) {
if ($this->Debugoutput == "error_log") {
error_log($str);
} else {
echo $str;
}
}
/**
* Initialize the class so that the data is in a known state.
* @access public
* @return SMTP
*/
public function __construct() {
$this->smtp_conn = 0;
$this->error = null;
$this->helo_rply = null;
$this->do_debug = 0;
}
/////////////////////////////////////////////////
// CONNECTION FUNCTIONS
/////////////////////////////////////////////////
/**
* Connect to the server specified on the port specified.
* If the port is not specified use the default SMTP_PORT.
* If tval is specified then a connection will try and be
* established with the server for that number of seconds.
* If tval is not specified the default is 30 seconds to
* try on the connection.
*
* SMTP CODE SUCCESS: 220
* SMTP CODE FAILURE: 421
* @access public
* @param string $host
* @param int $port
* @param int $tval
* @return bool
*/
public function Connect($host, $port = 0, $tval = 30) {
// set the error val to null so there is no confusion
$this->error = null;
// make sure we are __not__ connected
if($this->connected()) {
// already connected, generate error
$this->error = array("error" => "Already connected to a server");
return false;
}
if(empty($port)) {
$port = $this->SMTP_PORT;
}
// connect to the smtp server
$this->smtp_conn = @fsockopen($host, // the host of the server
$port, // the port to use
$errno, // error number if any
$errstr, // error message if any
$tval); // give up after ? secs
// verify we connected properly
if(empty($this->smtp_conn)) {
$this->error = array("error" => "Failed to connect to server",
"errno" => $errno,
"errstr" => $errstr);
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": $errstr ($errno)" . $this->CRLF . '<br />');
}
return false;
}
// SMTP server can take longer to respond, give longer timeout for first read
// Windows does not have support for this timeout function
if(substr(PHP_OS, 0, 3) != "WIN") {
$max = ini_get('max_execution_time');
if ($max != 0 && $tval > $max) { // don't bother if unlimited
@set_time_limit($tval);
}
stream_set_timeout($this->smtp_conn, $tval, 0);
}
// get any announcement
$announce = $this->get_lines();
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $announce . $this->CRLF . '<br />');
}
return true;
}
/**
* Initiate a TLS communication with the server.
*
* SMTP CODE 220 Ready to start TLS
* SMTP CODE 501 Syntax error (no parameters allowed)
* SMTP CODE 454 TLS not available due to temporary reason
* @access public
* @return bool success
*/
public function StartTLS() {
$this->error = null; # to avoid confusion
if(!$this->connected()) {
$this->error = array("error" => "Called StartTLS() without being connected");
return false;
}
fputs($this->smtp_conn,"STARTTLS" . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 220) {
$this->error =
array("error" => "STARTTLS not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
// Begin encrypted connection
if(!stream_socket_enable_crypto($this->smtp_conn, true, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
return false;
}
return true;
}
/**
* Performs SMTP authentication. Must be run after running the
* Hello() method. Returns true if successfully authenticated.
* @access public
* @param string $username
* @param string $password
* @param string $authtype
* @param string $realm
* @param string $workstation
* @return bool
*/
public function Authenticate($username, $password, $authtype='LOGIN', $realm='', $workstation='') {
if (empty($authtype)) {
$authtype = 'LOGIN';
}
switch ($authtype) {
case 'PLAIN':
// Start authentication
fputs($this->smtp_conn,"AUTH PLAIN" . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 334) {
$this->error =
array("error" => "AUTH not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
// Send encoded username and password
fputs($this->smtp_conn, base64_encode("\0".$username."\0".$password) . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 235) {
$this->error =
array("error" => "Authentication not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
break;
case 'LOGIN':
// Start authentication
fputs($this->smtp_conn,"AUTH LOGIN" . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 334) {
$this->error =
array("error" => "AUTH not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
// Send encoded username
fputs($this->smtp_conn, base64_encode($username) . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 334) {
$this->error =
array("error" => "Username not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
// Send encoded password
fputs($this->smtp_conn, base64_encode($password) . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 235) {
$this->error =
array("error" => "Password not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
break;
case 'NTLM':
/*
* ntlm_sasl_client.php
** Bundled with Permission
**
** How to telnet in windows: http://technet.microsoft.com/en-us/library/aa995718%28EXCHG.65%29.aspx
** PROTOCOL Documentation http://curl.haxx.se/rfc/ntlm.html#ntlmSmtpAuthentication
*/
require_once('ntlm_sasl_client.php');
$temp = new stdClass();
$ntlm_client = new ntlm_sasl_client_class;
if(! $ntlm_client->Initialize($temp)){//let's test if every function its available
$this->error = array("error" => $temp->error);
if($this->do_debug >= 1) {
$this->edebug("You need to enable some modules in your php.ini file: " . $this->error["error"] . $this->CRLF);
}
return false;
}
$msg1 = $ntlm_client->TypeMsg1($realm, $workstation);//msg1
fputs($this->smtp_conn,"AUTH NTLM " . base64_encode($msg1) . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 334) {
$this->error =
array("error" => "AUTH not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF);
}
return false;
}
$challange = substr($rply,3);//though 0 based, there is a white space after the 3 digit number....//msg2
$challange = base64_decode($challange);
$ntlm_res = $ntlm_client->NTLMResponse(substr($challange,24,8),$password);
$msg3 = $ntlm_client->TypeMsg3($ntlm_res,$username,$realm,$workstation);//msg3
// Send encoded username
fputs($this->smtp_conn, base64_encode($msg3) . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($code != 235) {
$this->error =
array("error" => "Could not authenticate",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF);
}
return false;
}
break;
}
return true;
}
/**
* Returns true if connected to a server otherwise false
* @access public
* @return bool
*/
public function Connected() {
if(!empty($this->smtp_conn)) {
$sock_status = socket_get_status($this->smtp_conn);
if($sock_status["eof"]) {
// the socket is valid but we are not connected
if($this->do_debug >= 1) {
$this->edebug("SMTP -> NOTICE:" . $this->CRLF . "EOF caught while checking if connected");
}
$this->Close();
return false;
}
return true; // everything looks good
}
return false;
}
/**
* Closes the socket and cleans up the state of the class.
* It is not considered good to use this function without
* first trying to use QUIT.
* @access public
* @return void
*/
public function Close() {
$this->error = null; // so there is no confusion
$this->helo_rply = null;
if(!empty($this->smtp_conn)) {
// close the connection and cleanup
fclose($this->smtp_conn);
$this->smtp_conn = 0;
}
}
/////////////////////////////////////////////////
// SMTP COMMANDS
/////////////////////////////////////////////////
/**
* Issues a data command and sends the msg_data to the server
* finializing the mail transaction. $msg_data is the message
* that is to be send with the headers. Each header needs to be
* on a single line followed by a <CRLF> with the message headers
* and the message body being seperated by and additional <CRLF>.
*
* Implements rfc 821: DATA <CRLF>
*
* SMTP CODE INTERMEDIATE: 354
* [data]
* <CRLF>.<CRLF>
* SMTP CODE SUCCESS: 250
* SMTP CODE FAILURE: 552,554,451,452
* SMTP CODE FAILURE: 451,554
* SMTP CODE ERROR : 500,501,503,421
* @access public
* @param string $msg_data
* @return bool
*/
public function Data($msg_data) {
$this->error = null; // so no confusion is caused
if(!$this->connected()) {
$this->error = array(
"error" => "Called Data() without being connected");
return false;
}
fputs($this->smtp_conn,"DATA" . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 354) {
$this->error =
array("error" => "DATA command not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
/* the server is ready to accept data!
* according to rfc 821 we should not send more than 1000
* including the CRLF
* characters on a single line so we will break the data up
* into lines by \r and/or \n then if needed we will break
* each of those into smaller lines to fit within the limit.
* in addition we will be looking for lines that start with
* a period '.' and append and additional period '.' to that
* line. NOTE: this does not count towards limit.
*/
// normalize the line breaks so we know the explode works
$msg_data = str_replace("\r\n","\n",$msg_data);
$msg_data = str_replace("\r","\n",$msg_data);
$lines = explode("\n",$msg_data);
/* we need to find a good way to determine is headers are
* in the msg_data or if it is a straight msg body
* currently I am assuming rfc 822 definitions of msg headers
* and if the first field of the first line (':' sperated)
* does not contain a space then it _should_ be a header
* and we can process all lines before a blank "" line as
* headers.
*/
$field = substr($lines[0],0,strpos($lines[0],":"));
$in_headers = false;
if(!empty($field) && !strstr($field," ")) {
$in_headers = true;
}
$max_line_length = 998; // used below; set here for ease in change
foreach ($lines as $line) {
$lines_out = null;
if ($line == "" && $in_headers) {
$in_headers = false;
}
}
// ok we need to break this line up into several smaller lines
while(strlen($line) > $max_line_length) {
$pos = strrpos(substr($line,0,$max_line_length)," ");
// Patch to fix DOS attack
if(!$pos) {
$pos = $max_line_length - 1;
$lines_out[] = substr($line,0,$pos);
$line = substr($line,$pos);
} else {
$lines_out[] = substr($line,0,$pos);
$line = substr($line,$pos + 1);
}
/* if processing headers add a LWSP-char to the front of new line
* rfc 822 on long msg headers
*/
if($in_headers) {
$line = "\t" . $line;
}
}
$lines_out[] = $line;
// send the lines to the server
while(list(,$line_out) = @each($lines_out)) {
if(strlen($line_out) > 0)
{
if(substr($line_out, 0, 1) == ".") {
$line_out = "." . $line_out;
}
}
fputs($this->smtp_conn,$line_out . $this->CRLF);
}
}
// message data has been sent
fputs($this->smtp_conn, $this->CRLF . "." . $this->CRLF);
fwrite($this->smtp_conn, $this->CRLF . "." . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 250) {
$this->error =
array("error" => "DATA not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
return true;
}
/**
* Sends the HELO command to the smtp server.
* This makes sure that we and the server are in
* the same known state.
*
* Implements from rfc 821: HELO <SP> <domain> <CRLF>
*
* SMTP CODE SUCCESS: 250
* SMTP CODE ERROR : 500, 501, 504, 421
* @access public
* @param string $host
* @return bool
*/
public function Hello($host = '') {
$this->error = null; // so no confusion is caused
if(!$this->connected()) {
$this->error = array(
"error" => "Called Hello() without being connected");
return false;
}
// if hostname for HELO was not specified send default
if(empty($host)) {
// determine appropriate default to send to server
$host = "localhost";
}
// Send extended hello first (RFC 2821)
if(!$this->SendHello("EHLO", $host)) {
if(!$this->SendHello("HELO", $host)) {
return false;
}
}
return true;
}
/**
* Sends a HELO/EHLO command.
* @access private
* @param string $hello
* @param string $host
* @return bool
*/
private function SendHello($hello, $host) {
fputs($this->smtp_conn, $hello . " " . $host . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER: " . $rply . $this->CRLF . '<br />');
}
if($code != 250) {
$this->error =
array("error" => $hello . " not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
$this->helo_rply = $rply;
return true;
}
/**
* Starts a mail transaction from the email address specified in
* $from. Returns true if successful or false otherwise. If True
* the mail transaction is started and then one or more Recipient
* commands may be called followed by a Data command.
*
* Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
*
* SMTP CODE SUCCESS: 250
* SMTP CODE SUCCESS: 552,451,452
* SMTP CODE SUCCESS: 500,501,421
* @access public
* @param string $from
* @return bool
*/
public function Mail($from) {
$this->error = null; // so no confusion is caused
if(!$this->connected()) {
$this->error = array(
"error" => "Called Mail() without being connected");
return false;
}
$useVerp = ($this->do_verp ? " XVERP" : "");
fputs($this->smtp_conn,"MAIL FROM:<" . $from . ">" . $useVerp . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 250) {
$this->error =
array("error" => "MAIL not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
return true;
}
/**
* Sends the quit command to the server and then closes the socket
* if there is no error or the $close_on_error argument is true.
*
* Implements from rfc 821: QUIT <CRLF>
*
* SMTP CODE SUCCESS: 221
* SMTP CODE ERROR : 500
* @access public
* @param bool $close_on_error
* @return bool
*/
public function Quit($close_on_error = true) {
$this->error = null; // so there is no confusion
if(!$this->connected()) {
$this->error = array(
"error" => "Called Quit() without being connected");
return false;
}
// send the quit command to the server
fputs($this->smtp_conn,"quit" . $this->CRLF);
// get any good-bye messages
$byemsg = $this->get_lines();
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $byemsg . $this->CRLF . '<br />');
}
$rval = true;
$e = null;
$code = substr($byemsg,0,3);
if($code != 221) {
// use e as a tmp var cause Close will overwrite $this->error
$e = array("error" => "SMTP server rejected quit command",
"smtp_code" => $code,
"smtp_rply" => substr($byemsg,4));
$rval = false;
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $e["error"] . ": " . $byemsg . $this->CRLF . '<br />');
}
}
if(empty($e) || $close_on_error) {
$this->Close();
}
return $rval;
}
/**
* Sends the command RCPT to the SMTP server with the TO: argument of $to.
* Returns true if the recipient was accepted false if it was rejected.
*
* Implements from rfc 821: RCPT <SP> TO:<forward-path> <CRLF>
*
* SMTP CODE SUCCESS: 250,251
* SMTP CODE FAILURE: 550,551,552,553,450,451,452
* SMTP CODE ERROR : 500,501,503,421
* @access public
* @param string $to
* @return bool
*/
public function Recipient($to) {
$this->error = null; // so no confusion is caused
if(!$this->connected()) {
$this->error = array(
"error" => "Called Recipient() without being connected");
return false;
}
fputs($this->smtp_conn,"RCPT TO:<" . $to . ">" . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 250 && $code != 251) {
$this->error =
array("error" => "RCPT not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
return true;
}
/**
* Sends the RSET command to abort and transaction that is
* currently in progress. Returns true if successful false
* otherwise.
*
* Implements rfc 821: RSET <CRLF>
*
* SMTP CODE SUCCESS: 250
* SMTP CODE ERROR : 500,501,504,421
* @access public
* @return bool
*/
public function Reset() {
$this->error = null; // so no confusion is caused
if(!$this->connected()) {
$this->error = array(
"error" => "Called Reset() without being connected");
return false;
}
fputs($this->smtp_conn,"RSET" . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 250) {
$this->error =
array("error" => "RSET failed",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
return true;
}
/**
* Starts a mail transaction from the email address specified in
* $from. Returns true if successful or false otherwise. If True
* the mail transaction is started and then one or more Recipient
* commands may be called followed by a Data command. This command
* will send the message to the users terminal if they are logged
* in and send them an email.
*
* Implements rfc 821: SAML <SP> FROM:<reverse-path> <CRLF>
*
* SMTP CODE SUCCESS: 250
* SMTP CODE SUCCESS: 552,451,452
* SMTP CODE SUCCESS: 500,501,502,421
* @access public
* @param string $from
* @return bool
*/
public function SendAndMail($from) {
$this->error = null; // so no confusion is caused
if(!$this->connected()) {
$this->error = array(
"error" => "Called SendAndMail() without being connected");
return false;
}
fputs($this->smtp_conn,"SAML FROM:" . $from . $this->CRLF);
$rply = $this->get_lines();
$code = substr($rply,0,3);
if($this->do_debug >= 2) {
$this->edebug("SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />');
}
if($code != 250) {
$this->error =
array("error" => "SAML not accepted from server",
"smtp_code" => $code,
"smtp_msg" => substr($rply,4));
if($this->do_debug >= 1) {
$this->edebug("SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />');
}
return false;
}
return true;
}
/**
* This is an optional command for SMTP that this class does not
* support. This method is here to make the RFC821 Definition
* complete for this class and __may__ be implimented in the future
*
* Implements from rfc 821: TURN <CRLF>
*
* SMTP CODE SUCCESS: 250
* SMTP CODE FAILURE: 502
* SMTP CODE ERROR : 500, 503
* @access public
* @return bool
*/
public function Turn() {
$this->error = array("error" => "This method, TURN, of the SMTP ".
"is not implemented");
if($this->do_debug >= 1) {
$this->edebug("SMTP -> NOTICE: " . $this->error["error"] . $this->CRLF . '<br />');
}
return false;
}
/**
* Get the current error
* @access public
* @return array
*/
public function getError() {
return $this->error;
}
/////////////////////////////////////////////////
// INTERNAL FUNCTIONS
/////////////////////////////////////////////////
/**
* Read in as many lines as possible
* either before eof or socket timeout occurs on the operation.
* With SMTP we can tell if we have more lines to read if the
* 4th character is '-' symbol. If it is a space then we don't
* need to read anything else.
* @access private
* @return string
*/
private function get_lines() {
$data = "";
$endtime = 0;
/* If for some reason the fp is bad, don't inf loop */
if (!is_resource($this->smtp_conn)) {
return $data;
}
stream_set_timeout($this->smtp_conn, $this->Timeout);
if ($this->Timelimit > 0) {
$endtime = time() + $this->Timelimit;
}
while(is_resource($this->smtp_conn) && !feof($this->smtp_conn)) {
$str = @fgets($this->smtp_conn,515);
if($this->do_debug >= 4) {
$this->edebug("SMTP -> get_lines(): \$data was \"$data\"" . $this->CRLF . '<br />');
$this->edebug("SMTP -> get_lines(): \$str is \"$str\"" . $this->CRLF . '<br />');
}
$data .= $str;
if($this->do_debug >= 4) {
$this->edebug("SMTP -> get_lines(): \$data is \"$data\"" . $this->CRLF . '<br />');
}
// if 4th character is a space, we are done reading, break the loop
if(substr($str,3,1) == " ") { break; }
// Timed-out? Log and break
$info = stream_get_meta_data($this->smtp_conn);
if ($info['timed_out']) {
if($this->do_debug >= 4) {
$this->edebug("SMTP -> get_lines(): timed-out (" . $this->Timeout . " seconds) <br />");
}
break;
}
// Now check if reads took too long
if ($endtime) {
if (time() > $endtime) {
if($this->do_debug >= 4) {
$this->edebug("SMTP -> get_lines(): timelimit reached (" . $this->Timelimit . " seconds) <br />");
}
break;
}
}
}
return $data;
}
}
?> 
