<?php

/*~ class.smtp.php

.---------------------------------------------------------------------------.

|  Software: PHPMailer - PHP email class                                    |

|   Version: 2.0.4                                                          |

|   Contact: via sourceforge.net support pages (also www.codeworxtech.com)  |

|      Info: http://phpmailer.sourceforge.net                               |

|   Support: http://sourceforge.net/projects/phpmailer/                     |

| ------------------------------------------------------------------------- |

|    Author: Andy Prevost (project admininistrator)                         |

|    Author: Brent R. Matzelle (original founder)                           |

| Copyright (c) 2004-2007, 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.                                         |

| ------------------------------------------------------------------------- |

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| - Web Hosting on highly optimized fast and secure servers                 |

| - Technology Consulting                                                   |

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'---------------------------------------------------------------------------'

 */

/**

 * SMTP is rfc 821 compliant and 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.

 * @package PHPMailer

 * @author Chris Ryan

 */

class SMTP

{

  /**

   *  SMTP server port

   *  @var int

   */

  var $SMTP_PORT = 25;

  /**

   *  SMTP reply line ending

   *  @var string

   */

  var $CRLF = "\r\n";

  /**

   *  Sets whether debugging is turned on

   *  @var bool

   */

  var $do_debug;       # the level of debug to perform

  /**

   *  Sets VERP use on/off (default is off)

   *  @var bool

   */

  var $do_verp = false;

  /**#@+

   * @access private

   */

  var $smtp_conn;      # the socket to the server

  var $error;          # error if any on the last call

  var $helo_rply;      # the reply the server sent to us for HELO

  /**#@-*/

  /**

   * Initialize the class so that the data is in a known state.

   * @access public

   * @return void

   */

  function SMTP() {

    $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

   * @return bool

   */

  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()) {

      # ok we are connected! what should we do?

      # for now we will just give an error saying we

      # are already connected

      $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) {

        echo "SMTP -> ERROR: " . $this->error["error"] .

                 ": $errstr ($errno)" . $this->CRLF;

      }

      return false;

    }

    # sometimes the SMTP server takes a little longer to respond

    # so we will give it a longer timeout for the first read

    // Windows still does not have support for this timeout function

    if(substr(PHP_OS, 0, 3) != "WIN")

     socket_set_timeout($this->smtp_conn, $tval, 0);

    # get any announcement stuff

    $announce = $this->get_lines();

    # set the timeout  of any socket functions at 1/10 of a second

    //if(function_exists("socket_set_timeout"))

    //   socket_set_timeout($this->smtp_conn, 0, 100000);

    if($this->do_debug >= 2) {

      echo "SMTP -> FROM SERVER:" . $this->CRLF . $announce;

    }

    return true;

  }

  /**

   * Performs SMTP authentication.  Must be run after running the

   * Hello() method.  Returns true if successfully authenticated.

   * @access public

   * @return bool

   */

  function Authenticate($username, $password) {

    // 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) {

        echo "SMTP -> ERROR: " . $this->error["error"] .

                 ": " . $rply . $this->CRLF;

      }

      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) {

        echo "SMTP -> ERROR: " . $this->error["error"] .

                 ": " . $rply . $this->CRLF;

      }

      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) {

        echo "SMTP -> ERROR: " . $this->error["error"] .

                 ": " . $rply . $this->CRLF;

      }

      return false;

    }

    return true;

  }

  /**

   * Returns true if connected to a server otherwise false

   * @access private

   * @return bool

   */

  function Connected() {

    if(!empty($this->smtp_conn)) {

      $sock_status = socket_get_status($this->smtp_conn);

      if($sock_status["eof"]) {

        # hmm this is an odd situation... the socket is

        # valid but we are not connected anymore

        if($this->do_debug >= 1) {

            echo "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

   */

  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

   * @return bool

   */

  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) {

      echo "SMTP -> FROM SERVER:" . $this->CRLF . $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) {

        echo "SMTP -> ERROR: " . $this->error["error"] .

                 ": " . $rply . $this->CRLF;

      }

      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 are 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 + 1);

        # if we are processing headers we need to

        # add a LWSP-char to the front of the new line

        # rfc 822 on long msg headers

        if($in_headers) {

          $line = "\t" . $line;

        }

      }

      $lines_out[] = $line;

      # now 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);

      }

    }

    # ok all the message data has been sent so lets get this

    # over with aleady

    fputs($this->smtp_conn, $this->CRLF . "." . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {

      echo "SMTP -> FROM SERVER:" . $this->CRLF . $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) {

        echo "SMTP -> ERROR: " . $this->error["error"] .

                 ": " . $rply . $this->CRLF;

      }

      return false;

    }

    return true;

  }

  /**

   * Expand takes the name and asks the server to list all the

   * people who are members of the _list_. Expand will return

   * back and array of the result or false if an error occurs.

   * Each value in the array returned has the format of:

   *     [ <full-name> <sp> ] <path>

   * The definition of <path> is defined in rfc 821

   *

   * Implements rfc 821: EXPN <SP> <string> <CRLF>

   *

   * SMTP CODE SUCCESS: 250

   * SMTP CODE FAILURE: 550

   * SMTP CODE ERROR  : 500,501,502,504,421

   * @access public

   * @return string array

   */

  function Expand($name) {

    $this->error = null; # so no confusion is caused

    if(!$this->connected()) {

      $this->error = array(

            "error" => "Called Expand() without being connected");

      return false;

    }

    fputs($this->smtp_conn,"EXPN " . $name . $this->CRLF);

    $rply = $this->get_lines();

    $code = substr($rply,0,3);

    if($this->do_debug >= 2) {