<?php
/*~ class.smtp.php
.---------------------------------------------------------------------------.
|  Software: PHPMailer - PHP email class                                    |
|   Version: 5.2.6                                                          |
|      Site: https://github.com/PHPMailer/PHPMailer/                        |
| ------------------------------------------------------------------------- |
|    Admins: Marcus Bointon                                                 |
|    Admins: Jim Jagielski                                                  |
|   Authors: Andy Prevost (codeworxtech) codeworxtech@users.sourceforge.net |
|          : Marcus Bointon (coolbru) phpmailer@synchromedia.co.uk          |
|          : Jim Jagielski (jimjag) jimjag@gmail.com                        |
|   Founder: Brent R. Matzelle (original founder)                           |
| Copyright (c) 2010-2012, Jim Jagielski. All Rights Reserved.              |
| Copyright (c) 2004-2009, Andy Prevost. All Rights Reserved.               |
| Copyright (c) 2001-2003, Brent R. Matzelle                                |
| ------------------------------------------------------------------------- |
|   License: Distributed under the Lesser General Public License (LGPL)     |
|            http://www.gnu.org/copyleft/lesser.html                        |
| This program is distributed in the hope that it will be useful - WITHOUT  |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or     |
| FITNESS FOR A PARTICULAR PURPOSE.                                         |
'---------------------------------------------------------------------------'
*/

/**
 * 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 = 25;

  /**
   *  SMTP reply line ending (don't change)
   *  @var string
   */
  public $CRLF = "\r\n";

  /**
   *  Debug output level; 0 for no output
   *  @var int
   */
  public $do_debug = 0;

  /**
   * Sets the function/method to use for debugging output.
   * Right now we only honor 'echo', 'html' 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         = '5.2.6';

  /////////////////////////////////////////////////
  // PROPERTIES, PRIVATE AND PROTECTED
  /////////////////////////////////////////////////

  /**
   * @var resource The socket to the server
   */
  protected $smtp_conn;
  /**
   * @var string Error message, if any, for the last call
   */
  protected $error;
  /**
   * @var string The reply the server sent to us for HELO
   */
  protected $helo_rply;

  /**
   * Outputs debugging info via user-defined method
   * @param string $str
   */
  protected function edebug($str)
  {
      switch ($this->Debugoutput) {
      case 'error_log':
        error_log($str);
        break;
      case 'html':
        //Cleans up output a bit for a better looking display that's HTML-safe
        echo htmlentities(preg_replace('/[\r\n]+/', '', $str), ENT_QUOTES, 'UTF-8')."<br>\n";
        break;
      case 'echo':
      default:
        //Just echoes exactly what was received
        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)");
        }

        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);
      }

      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;
    }

      $this->client_send('STARTTLS'.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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
        $this->client_send('AUTH PLAIN'.$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);
            }

            return false;
        }
        // Send encoded username and password
          $this->client_send(base64_encode("\0".$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);
            }

            return false;
        }
        break;
      case 'LOGIN':
        // Start authentication
        $this->client_send('AUTH LOGIN'.$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);
            }

            return false;
        }

        // Send encoded username
        $this->client_send(base64_encode($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);
            }

            return false;
        }

        // Send encoded password
        $this->client_send(base64_encode($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);
            }

            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 'extras/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']);
            }

            return false;
        }
        $msg1 = $ntlm_client->TypeMsg1($realm, $workstation);//msg1

        $this->client_send('AUTH NTLM '.base64_encode($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);
            }

            return false;
        }

        $challenge = substr($rply, 3);//though 0 based, there is a white space after the 3 digit number....//msg2
        $challenge = base64_decode($challenge);
        $ntlm_res = $ntlm_client->NTLMResponse(substr($challenge, 24, 8), $password);
        $msg3 = $ntlm_client->TypeMsg3($ntlm_res, $username, $realm, $workstation);//msg3
        // Send encoded username
        $this->client_send(base64_encode($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);
            }

            return false;
        }
        break;
      case 'CRAM-MD5':
        // Start authentication
        $this->client_send('AUTH CRAM-MD5'.$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);
            }

            return false;
        }

        // Get the challenge
        $challenge = base64_decode(substr($rply, 4));

        // Build the response
        $response = $username.' '.$this->hmac($challenge, $password);

        // Send encoded credentials
        $this->client_send(base64_encode($response).$this->CRLF);

        $rply = $this->get_lines();
        $code = substr($rply, 0, 3);

        if ($code != 235) {
            $this->error =
            array('error' => 'Credentials 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);
            }

            return false;
        }
        break;
    }

      return true;
  }

  /**
   * Works like hash_hmac('md5', $data, $key) in case that function is not available
   * @access protected
   * @param string $data
   * @param string $key
   * @return string
   */
  protected function hmac($data, $key)
  {
      if (function_exists('hash_hmac')) {
          return hash_hmac('md5', $data, $key);
      }

      // The following borrowed from http://php.net/manual/en/function.mhash.php#27225

      // RFC 2104 HMAC implementation for php.
      // Creates an md5 HMAC.
      // Eliminates the need to install mhash to compute a HMAC
      // Hacked by Lance Rushing

      $b = 64; // byte length for md5
      if (strlen($key) > $b) {
          $key = pack('H*', md5($key));
      }
      $key  = str_pad($key, $b, chr(0x00));
      $ipad = str_pad('', $b, chr(0x36));
      $opad = str_pad('', $b, chr(0x5c));
      $k_ipad = $key ^ $ipad;
      $k_opad = $key ^ $opad;

      return md5($k_opad.pack('H*', md5($k_ipad.$data)));
  }

  /**
   * Returns true if connected to a server otherwise false
   * @access public
   * @return bool
   */
  public function Connected()
  {
      if (!empty($this->smtp_conn)) {
          $sock_status = stream_get_meta_data($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: 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;
    }

      $this->client_send('DATA'.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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

    while (list(, $line) = @each($lines)) {
        $lines_out = null;
        if ($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;
              }
          }
          $this->client_send($line_out.$this->CRLF);
      }
    }

    // message data has been sent
    $this->client_send($this->CRLF.'.'.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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 protected
   * @param string $hello
   * @param string $host
   * @return bool
   */
  protected function SendHello($hello, $host)
  {
      $this->client_send($hello.' '.$host.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER: '.$rply);
      }

      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);
          }

          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' : '');
      $this->client_send('MAIL FROM:<'.$from.'>'.$useVerp.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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
    $this->client_send('quit'.$this->CRLF);

    // get any good-bye messages
    $byemsg = $this->get_lines();

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$byemsg);
      }

      $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);
          }
      }

      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;
    }

      $this->client_send('RCPT TO:<'.$to.'>'.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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;
    }

      $this->client_send('RSET'.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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;
    }

      $this->client_send('SAML FROM:'.$from.$this->CRLF);

      $rply = $this->get_lines();
      $code = substr($rply, 0, 3);

      if ($this->do_debug >= 2) {
          $this->edebug('SMTP -> FROM SERVER:'.$rply);
      }

      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);
          }

          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']);
      }

      return false;
  }

  /**
   * Sends data to the server
   * @param string $data
   * @access public
   * @return Integer number of bytes sent to the server or FALSE on error
   */
  public function client_send($data)
  {
      if ($this->do_debug >= 1) {
          $this->edebug("CLIENT -> SMTP: $data");
      }

      return fwrite($this->smtp_conn, $data);
  }

  /**
   * 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 protected
   * @return string
   */
  protected 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\"");
              $this->edebug("SMTP -> get_lines(): \$str is \"$str\"");
          }
          $data .= $str;
          if ($this->do_debug >= 4) {
              $this->edebug("SMTP -> get_lines(): \$data is \"$data\"");
          }
      // 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)');
              }
              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)');
              }
              break;
          }
      }
      }

      return $data;
  }
}
