functions/smtp.php

   1 <?php
   2    /** smtp.php
   3     **
   4     ** This contains all the functions needed to send messages through
   5     ** an smtp server or sendmail.
   6     **/
   7
   8    $smtp_php = true;
   9
  10    // Returns true only if this message is multipart
  11    function isMultipart () {
  12       global $attachments;
  13
  14       if (count($attachments)>0)
  15          return true;
  16       else
  17          return false;
  18    }
  19
  20    // Attach the files that are due to be attached
  21    function attachFiles ($fp) {
  22       global $attachments, $attachment_dir;
  23
  24       $length = 0;
  25
  26       if (isMultipart()) {
  27          reset($attachments);
  28          while (list($localname, $remotename) = each($attachments)) {
  29             // This is to make sure noone is giving a filename in another
  30             // directory
  31             $localname = ereg_replace ("\\/", "", $localname);
  32
  33             $fileinfo = fopen ($attachment_dir.$localname.".info", "r");
  34             $filetype = fgets ($fileinfo, 8192);
  35             fclose ($fileinfo);
  36             $filetype = trim ($filetype);
  37             if ($filetype=="")
  38                $filetype = "application/octet-stream";
  39
  40             $header = "--".mimeBoundary()."\r\n";
  41             $header .= "Content-Type: $filetype\r\n";
  42             $header .= "Content-Disposition: attachment; filename=\"$remotename\"\r\n";
  43             $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
  44             fputs ($fp, $header);
  45             $length += strlen($header);
  46
  47             $file = fopen ($attachment_dir.$localname, "r");
  48             while ($tmp = fread($file, 570)) {
  49                $encoded = chunk_split(base64_encode($tmp));
  50                $length += strlen($encoded);
  51                fputs ($fp, $encoded);
  52             }
  53             fclose ($file);
  54          }
  55       }
  56
  57       return $length;
  58    }
  59
  60    // Delete files that are uploaded for attaching
  61    function deleteAttachments() {
  62       global $attachments, $attachment_dir;
  63
  64       if (isMultipart()) {
  65          reset($attachments);
  66          while (list($localname, $remotename) = each($attachments)) {
  67             if (!ereg ("\\/", $localname)) {
  68                unlink ($attachment_dir.$localname);
  69                unlink ($attachment_dir.$localname.".info");
  70             }
  71          }
  72       }
  73    }
  74
  75    // Return a nice MIME-boundary
  76    function mimeBoundary () {
  77       global $version, $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
  78
  79       static $mimeBoundaryString;
  80
  81       if ($mimeBoundaryString == "") {
  82          $temp = "SquirrelMail".$version.$REMOTE_ADDR.$SERVER_NAME.
  83             $REMOTE_PORT;
  84          $mimeBoundaryString = "=-_+".substr(md5($temp),1,20);
  85       }
  86
  87       return $mimeBoundaryString;
  88    }
  89
  90    /* Time offset for correct timezone */
  91    function timezone () {
  92       $diff_second = date("Z");
  93       if ($diff_second > 0)
  94          $sign = "+";
  95       else
  96          $sign = "-";
  97
  98       $diff_second = abs($diff_second);
  99
 100       $diff_hour = floor ($diff_second / 3600);
 101       $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 102
 103       $zonename = "(".strftime("%Z").")";
 104       $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
 105       return ($result);
 106    }
 107
 108    /* Print all the needed RFC822 headers */
 109    function write822Header ($fp, $t, $c, $b, $subject, $more_headers) {
 110       global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 111       global $data_dir, $username, $domain, $version, $useSendmail;
 112       global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 113
 114       // Storing the header to make sure the header is the same
 115       // everytime the header is printed.
 116       static $header, $headerlength;
 117
 118       if ($header == "") {
 119          $to = parseAddrs($t);
 120          $cc = parseAddrs($c);
 121          $bcc = parseAddrs($b);
 122          $reply_to = getPref($data_dir, $username, "reply_to");
 123          $from = getPref($data_dir, $username, "full_name");
 124          $from_addr = getPref($data_dir, $username, "email_address");
 125
 126          if ($from_addr == "")
 127             $from_addr = "$username@$domain";
 128
 129          $to_list = getLineOfAddrs($to);
 130          $cc_list = getLineOfAddrs($cc);
 131          $bcc_list = getLineOfAddrs($bcc);
 132
 133          /* Encoding 8-bit characters and making from line */
 134          $subject = encodeHeader($subject);
 135          if ($from == "")
 136             $from = "<$from_addr>";
 137          else
 138             $from = encodeHeader($from) . " <$from_addr>";
 139
 140          /* This creates an RFC 822 date */
 141          $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 142
 143          /* Create a message-id */
 144          $message_id = "<" . $REMOTE_PORT . "." . $REMOTE_ADDR . ".";
 145          $message_id .= time() . "@" . $SERVER_NAME .">";
 146
 147          /* Make an RFC822 Received: line */
 148          $received_from = "$REMOTE_ADDR";
 149          if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 150             if ($HTTP_X_FORWARDED_FOR == "")
 151                $HTTP_X_FORWARDED_FOR = "unknown";
 152             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 153          }
 154          $header = "Received: from $received_from by $SERVER_NAME with HTTP; ";
 155          $header .= "$date\r\n";
 156
 157          /* Insert the rest of the header fields */
 158          $header .= "Message-ID: $message_id\r\n";
 159          $header .= "Date: $date\r\n";
 160          $header .= "Subject: $subject\r\n";
 161          $header .= "From: $from\r\n";
 162          $header .= "To: $to_list \r\n";    // Who it's TO
 163
 164          /* Insert headers from the $more_headers array */
 165          if(is_array($more_headers)) {
 166             reset($more_headers);
 167             while(list($h_name, $h_val) = each($more_headers)) {
 168                $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 169             }
 170          }
 171
 172          if ($cc_list) {
 173             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 174          }
 175
 176          if ($reply_to != "")
 177             $header .= "Reply-To: $reply_to\r\n";
 178
 179          if ($useSendmail) {
 180             if ($bcc_list) {
 181                // BCCs is removed from header by sendmail
 182                $header .= "Bcc: $bcc_list\r\n";
 183             }
 184          }
 185
 186          $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; // Identify SquirrelMail
 187
 188          // Do the MIME-stuff
 189          $header .= "MIME-Version: 1.0\r\n";
 190
 191          if (isMultipart()) {
 192             $header .= "Content-Type: multipart/mixed; boundary=\"";
 193             $header .= mimeBoundary();
 194             $header .= "\"\r\n";
 195          } else {
 196             if ($default_charset != "")
 197                $header .= "Content-Type: text/plain; charset=$default_charset\r\n";
 198             else
 199                $header .= "Content-Type: text/plain;\r\n";
 200             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 201          }
 202          $header .= "\r\n"; // One blank line to separate header and body
 203
 204          $headerlength = strlen($header);
 205       }
 206
 207       // Write the header
 208       fputs ($fp, $header);
 209
 210       return $headerlength;
 211    }
 212
 213    // Send the body
 214    function writeBody ($fp, $passedBody) {
 215       global $default_charset;
 216
 217       $attachmentlength = 0;
 218
 219       if (isMultipart()) {
 220          $body = "--".mimeBoundary()."\r\n";
 221
 222          if ($default_charset != "")
 223             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 224          else
 225             $body .= "Content-Type: text/plain\r\n";
 226
 227          $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 228          $body .= stripslashes($passedBody) . "\r\n";
 229          fputs ($fp, $body);
 230
 231          $attachmentlength = attachFiles($fp);
 232
 233          $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 234          fputs ($fp, $postbody);
 235       } else {
 236          $body = stripslashes($passedBody) . "\r\n";
 237          fputs ($fp, $body);
 238          $postbody = "\r\n";
 239          fputs ($fp, $postbody);
 240       }
 241
 242       return (strlen($body) + strlen($postbody) + $attachmentlength);
 243    }
 244
 245    // Send mail using the sendmail command
 246    function sendSendmail($t, $c, $b, $subject, $body, $more_headers) {
 247       global $sendmail_path, $username, $domain;
 248
 249       // open pipe to sendmail
 250       $fp = popen (escapeshellcmd("$sendmail_path -t -f$username@$domain"), "w");
 251
 252       $headerlength = write822Header ($fp, $t, $c, $b, $subject, $more_headers);
 253       $bodylength = writeBody($fp, $body);
 254
 255       pclose($fp);
 256
 257       return ($headerlength + $bodylength);
 258    }
 259
 260    function smtpReadData($smtpConnection) {
 261       $read = fgets($smtpConnection, 1024);
 262       $counter = 0;
 263       while ($read) {
 264          echo $read . "<BR>";
 265          $data[$counter] = $read;
 266          $read = fgets($smtpConnection, 1024);
 267          $counter++;
 268       }
 269    }
 270
 271    function sendSMTP($t, $c, $b, $subject, $body, $more_headers) {
 272       global $username, $domain, $version, $smtpServerAddress, $smtpPort,
 273          $data_dir, $color;
 274
 275       $to = parseAddrs($t);
 276       $cc = parseAddrs($c);
 277       $bcc = parseAddrs($b);
 278       $from_addr = getPref($data_dir, $username, "email_address");
 279
 280       if ($from_addr == "")
 281          $from_addr = "$username@$domain";
 282
 283       $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 284       if (!$smtpConnection) {
 285          echo "Error connecting to SMTP Server.<br>";
 286          echo "$errorNumber : $errorString<br>";
 287          exit;
 288       }
 289       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 290       errorCheck($tmp);
 291
 292       $to_list = getLineOfAddrs($to);
 293       $cc_list = getLineOfAddrs($cc);
 294
 295       /** Lets introduce ourselves */
 296       fputs($smtpConnection, "HELO $domain\r\n");
 297       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 298       errorCheck($tmp);
 299
 300       /** Ok, who is sending the message? */
 301       fputs($smtpConnection, "MAIL FROM:<$from_addr>\r\n");
 302       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 303       errorCheck($tmp);
 304
 305       /** send who the recipients are */
 306       for ($i = 0; $i < count($to); $i++) {
 307          fputs($smtpConnection, "RCPT TO:<$to[$i]>\r\n");
 308          $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 309          errorCheck($tmp);
 310       }
 311       for ($i = 0; $i < count($cc); $i++) {
 312          fputs($smtpConnection, "RCPT TO:<$cc[$i]>\r\n");
 313          $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 314          errorCheck($tmp);
 315       }
 316       for ($i = 0; $i < count($bcc); $i++) {
 317          fputs($smtpConnection, "RCPT TO:<$bcc[$i]>\r\n");
 318          $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 319          errorCheck($tmp);
 320       }
 321
 322       /** Lets start sending the actual message */
 323       fputs($smtpConnection, "DATA\r\n");
 324       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 325       errorCheck($tmp);
 326
 327       // Send the message
 328       $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $more_headers);
 329       $bodylength = writeBody($smtpConnection, $body);
 330
 331       fputs($smtpConnection, ".\r\n"); // end the DATA part
 332       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 333       $num = errorCheck($tmp);
 334       if ($num != 250) {
 335          echo "ERROR<BR>Message not sent!<BR>Reason given: $tmp<BR></BODY></HTML>";
 336       }
 337
 338       fputs($smtpConnection, "QUIT\r\n"); // log off
 339
 340       fclose($smtpConnection);
 341
 342       return ($headerlength + $bodylength);
 343    }
 344
 345
 346    function errorCheck($line) {
 347       global $color;
 348       // Status:  0 = fatal
 349       //          5 = ok
 350
 351       $err_num = substr($line, 0, strpos($line, " "));
 352       switch ($err_num) {
 353          case 500:   $message = "Syntax error; command not recognized";
 354                      $status = 0;
 355                      break;
 356          case 501:   $message = "Syntax error in parameters or arguments";
 357                      $status = 0;
 358                      break;
 359          case 502:   $message = "Command not implemented";
 360                      $status = 0;
 361                      break;
 362          case 503:   $message = "Bad sequence of commands";
 363                      $status = 0;
 364                      break;
 365          case 504:   $message = "Command parameter not implemented";
 366                      $status = 0;
 367                      break;
 368
 369
 370          case 211:   $message = "System status, or system help reply";
 371                      $status = 5;
 372                      break;
 373          case 214:   $message = "Help message";
 374                      $status = 5;
 375                      break;
 376
 377
 378          case 220:   $message = "Service ready";
 379                      $status = 5;
 380                      break;
 381          case 221:   $message = "Service closing transmission channel";
 382                      $status = 5;
 383                      break;
 384          case 421:   $message = "Service not available, closing chanel";
 385                      $status = 0;
 386                      break;
 387
 388
 389          case 250:   $message = "Requested mail action okay, completed";
 390                      $status = 5;
 391                      break;
 392          case 251:   $message = "User not local; will forward";
 393                      $status = 5;
 394                      break;
 395          case 450:   $message = "Requested mail action not taken:  mailbox unavailable";
 396                      $status = 0;
 397                      break;
 398          case 550:   $message = "Requested action not taken:  mailbox unavailable";
 399                      $status = 0;
 400                      break;
 401          case 451:   $message = "Requested action aborted:  error in processing";
 402                      $status = 0;
 403                      break;
 404          case 551:   $message = "User not local; please try forwarding";
 405                      $status = 0;
 406                      break;
 407          case 452:   $message = "Requested action not taken:  insufficient system storage";
 408                      $status = 0;
 409                      break;
 410          case 552:   $message = "Requested mail action aborted:  exceeding storage allocation";
 411                      $status = 0;
 412                      break;
 413          case 553:   $message = "Requested action not taken: mailbox name not allowed";
 414                      $status = 0;
 415                      break;
 416          case 354:   $message = "Start mail input; end with .";
 417                      $status = 5;
 418                      break;
 419          case 554:   $message = "Transaction failed";
 420                      $status = 0;
 421                      break;
 422          default:    $message = "Unknown response: $line";
 423                      $status = 0;
 424                      $error_num = "001";
 425                      break;
 426       }
 427
 428       if ($status == 0) {
 429          echo "<HTML><BODY BGCOLOR=#ffffff>";
 430          echo "<TT>";
 431          echo "<BR><B>ERROR</B><BR><BR>";
 432          echo "&nbsp;&nbsp;&nbsp;<B>Error Number: </B>$err_num<BR>";
 433          echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Reason: </B>$message<BR>";
 434          echo "<B>Server Response: </B>$line<BR>";
 435          echo "<BR>MAIL NOT SENT";
 436          echo "</TT></BODY></HTML>";
 437          exit;
 438       }
 439       return $err_num;
 440    }
 441
 442    function sendMessage($t, $c, $b, $subject, $body, $reply_id) {
 443       global $useSendmail, $msg_id, $is_reply, $mailbox;
 444       global $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress, $imapPort;
 445       $more_headers = Array();
 446
 447       $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 448
 449       if ($reply_id) {
 450          sqimap_mailbox_select ($imap_stream, $mailbox);
 451          sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, "Answered");
 452
 453          // Insert In-Reply-To and References headers if the
 454          // message-id of the message we reply to is set (longer than "<>")
 455          // The References header should really be the old Referenced header
 456          // with the message ID appended, but it can be only the message ID too.
 457          $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 458          if(strlen($hdr->message_id) > 2) {
 459             $more_headers["In-Reply-To"] = $hdr->message_id;
 460             $more_headers["References"]  = $hdr->message_id;
 461          }
 462       }
 463
 464       if ($useSendmail==true) {
 465          $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers);
 466       } else {
 467          $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers);
 468       }
 469
 470       if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 471          sqimap_append ($imap_stream, $sent_folder, $length);
 472          write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers);
 473          writeBody ($imap_stream, $body);
 474          sqimap_append_done ($imap_stream);
 475       }
 476
 477       // Delete the files uploaded for attaching (if any).
 478       deleteAttachments();
 479    }
 480 ?>