<?
include_once("inc/auth.php");
include_once("inc/utility_all.php");

class smtp
{
/* Public Variables */
var $smtp_port;
var $time_out;
var $host_name;
var $log_file;
var $relay_host;
var $debug;
var $auth;
var $user;
var $pass;

/* Private Variables */
var $sock;

/* Constractor */
function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)
{
  $this->debug = FALSE;
  $this->smtp_port = $smtp_port;
  $this->relay_host = $relay_host;
  $this->time_out = 30; //is used in fsockopen()
  $this->auth = $auth;//auth
  $this->user = $user;
  $this->pass = $pass;
  $this->host_name = "localhost"; //is used in HELO command
  $this->log_file = "";
  $this->sock = FALSE;
}

/* Main Function */

function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
{
  $mail_from = $this->get_address($this->strip_comment($from));
  $body = ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);
  $header .= "MIME-Version:1.0\r\n";
  if($mailtype=="HTML")
  {
     $header .= "Content-Type:text/html\r\n";
  }
  
  $header .= "To: ".$to."\r\n";
  
  if($cc != "")
  {
     $header .= "Cc: ".$cc."\r\n";
  }
  
  $header .= "From: $from<".$from.">\r\n";
  $header .= "Subject: ".$subject."\r\n";
  $header .= $additional_headers;
  $header .= "Date: ".date("r")."\r\n";
  $header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
  list($msec, $sec) = explode(" ", microtime());
  $header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";
  $TO = explode(",", $this->strip_comment($to));
  
  if($cc != "")
  {
     $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
  }
  
  if($bcc != "")
  {
     $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
   }
  
  $sent = TRUE;
  
  foreach ($TO as $rcpt_to)
  {
     $rcpt_to = $this->get_address($rcpt_to);
     if (!$this->smtp_sockopen($rcpt_to))
     {
        $this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
        $sent = FALSE;
        continue;
     }
  
     if($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body))
     {
        $this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
     }
     else
     {
       $this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
       $sent = FALSE;
      }
  
     fclose($this->sock);
     $this->log_write("Disconnected from remote host\n");
  }
  return $sent;
}

/* Private Functions */
function smtp_send($helo, $from, $to, $header, $body = "")
{
   if(!$this->smtp_putcmd("HELO", $helo))
   { 
      return $this->smtp_error("sending HELO command");
    }
#auth

   if($this->auth)
   {
      if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user)))
      {
         return $this->smtp_error("sending HELO command");
       }

      if (!$this->smtp_putcmd("", base64_encode($this->pass)))
      {
          return $this->smtp_error("sending HELO command");
       }
   }
#
   if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">"))
   {
       return $this->smtp_error("sending MAIL FROM command");
   }
   
   if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">"))
   {
      return $this->smtp_error("sending RCPT TO command");
   }
   
   if (!$this->smtp_putcmd("DATA"))
   {
      return $this->smtp_error("sending DATA command");
   }
   
   if (!$this->smtp_message($header, $body)) 
   {
      return $this->smtp_error("sending message");
   }
   
   if (!$this->smtp_eom())
   {
      return $this->smtp_error("sending . [EOM]");
   }
   
   if (!$this->smtp_putcmd("QUIT"))
   {
      return $this->smtp_error("sending QUIT command");
   }
   
   return TRUE;
}

function smtp_sockopen($address)
{
   if ($this->relay_host == "")
   {
      return $this->smtp_sockopen_mx($address);
   }
   else
   {
      return $this->smtp_sockopen_relay();
    }
}

function smtp_sockopen_relay()
{
   $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
   $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
   if (!($this->sock && $this->smtp_ok()))
   {
      $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
      $this->log_write("Error: ".$errstr." (".$errno.")\n");
      return FALSE;
   }

   $this->log_write("Connected to relay host ".$this->relay_host."\n");
   return TRUE;;
}

function smtp_sockopen_mx($address)
{
   $domain = ereg_replace("^.+@([^@]+)$", "\1", $address);
   if (!@getmxrr($domain, $MXHOSTS))
   {
      $this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
      return FALSE;  
   }

   foreach ($MXHOSTS as $host)
   {
      $this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
      $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
      if (!($this->sock && $this->smtp_ok()))
      {
         $this->log_write("Warning: Cannot connect to mx host ".$host."\n");
         $this->log_write("Error: ".$errstr." (".$errno.")\n");
         continue;
      }
      
      $this->log_write("Connected to mx host ".$host."\n");
      return TRUE;
   }

   $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
   return FALSE;
}

function smtp_message($header, $body)
{
   fputs($this->sock, $header."\r\n".$body);
   $this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));
   return TRUE;
}

function smtp_eom()
{
   fputs($this->sock, "\r\n.\r\n");
   $this->smtp_debug(". [EOM]\n");
   return $this->smtp_ok();
}

function smtp_ok()
{
   $response = str_replace("\r\n", "", fgets($this->sock, 512));
   $this->smtp_debug($response."\n");
   if (!ereg("^[23]", $response))
   {
      fputs($this->sock, "QUIT\r\n");
      fgets($this->sock, 512);
      $this->log_write("Error: Remote host returned \"".$response."\"\n");
      return FALSE;
   }
   return TRUE;
}

function smtp_putcmd($cmd, $arg = "")
{
   if ($arg != "") 
   {
      if($cmd=="")
         $cmd = $arg;
      else
         $cmd = $cmd." ".$arg;
   }
   
   fputs($this->sock, $cmd."\r\n");
   $this->smtp_debug("> ".$cmd."\n");
   return $this->smtp_ok();
}

function smtp_error($string)
{
   $this->log_write("Error: Error occurred while ".$string.".\n");
   return FALSE;
}

function log_write($message)
{
   $this->smtp_debug($message);
   if ($this->log_file == "")
   {  
      return TRUE;
    }
   $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
   if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a")))
   {
      $this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
      return FALSE;;
   }
   
   flock($fp, LOCK_EX);
   fputs($fp, $message);
   fclose($fp);
   return TRUE;
}

function strip_comment($address)
{
   $comment = "\([^()]*\)";
   while (ereg($comment, $address))
   {
      $address = ereg_replace($comment, "", $address);
   }
   return $address;
}

function get_address($address)
{
   $address = ereg_replace("([ \t\r\n])+", "", $address);
   $address = ereg_replace("^.*<(.+)>.*$", "\1", $address);
   return $address;
}

function smtp_debug($message)
{
   if ($this->debug)
   {
     $message;
   }
}

}//CLASS

?>