functions/smtp.php

   1 <?
   2    /** smtp.php
   3     **
   4     ** This contains all the functions needed to send messages through
   5     ** an smtp server or sendmail.
   6     **/
   7
   8
   9    // Returns true only if this message is multipart
  10    function isMultipart () {
  11       global $attachments;
  12
  13       if (count($attachments)>0)
  14          return true;
  15       else
  16          return false;
  17    }
  18
  19    // Attach the files that are due to be attached
  20    function attachFiles ($fp) {
  21       global $attachments, $attachment_dir;
  22
  23       while (list($localname, $remotename) = each($attachments)) {
  24          // This is to make sure noone is giving a filename in another
  25          // directory
  26          $localname = ereg_replace ("\\/", "", $localname);
  27
  28          $fileinfo = fopen ($attachment_dir.$localname.".info", "r");
  29          $filetype = fgets ($fileinfo, 8192);
  30          fclose ($fileinfo);
  31          $filetype = trim ($filetype);
  32          if ($filetype=="")
  33             $filetype = "application/octet-stream";
  34
  35          fputs ($fp, "--".mimeBoundary()."\n");
  36          fputs ($fp, "Content-Type: $filetype\n");
  37          fputs ($fp, "Content-Disposition: attachment; filename=\"$remotename\"\n");
  38          fputs ($fp, "Content-Transfer-Encoding: base64\n\n");
  39
  40          $file = fopen ($attachment_dir.$localname, "r");
  41          while ($tmp = fread($file, 57))
  42             fputs ($fp, chunk_split(base64_encode($tmp)));
  43          fclose ($file);
  44
  45          unlink ($attachment_dir.$localname);
  46          unlink ($attachment_dir.$localname.".info");
  47       }
  48    }
  49
  50    // Return a nice MIME-boundary
  51    function mimeBoundary () {
  52       global $mimeBoundaryString, $version, $REMOTE_ADDR, $SERVER_NAME,
  53          $REMOTE_PORT;
  54
  55       if ($mimeBoundaryString == "") {
  56          $temp = "SquirrelMail".$version.$REMOTE_ADDR.$SERVER_NAME.
  57             $REMOTE_PORT;
  58          $mimeBoundaryString = "=-_+".substr(md5($temp),1,20);
  59       }
  60
  61       return $mimeBoundaryString;
  62    }
  63
  64    /* Time offset for correct timezone */
  65    function timezone () {
  66       $diff_second = date("Z");
  67       if ($diff_second > 0)
  68          $sign = "+";
  69       else
  70          $sign = "-";
  71
  72       $diff_second = abs($diff_second);
  73
  74       $diff_hour = floor ($diff_second / 3600);
  75       $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
  76
  77       $zonename = "(".strftime("%Z").")";
  78       $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
  79       return ($result);
  80    }
  81
  82    /* Print all the needed RFC822 headers */
  83    function write822Header ($fp, $t, $c, $b, $subject) {
  84       global $REMOTE_ADDR, $SERVER_NAME;
  85       global $data_dir, $username, $domain, $version, $useSendmail;
  86
  87       $to = parseAddrs($t);
  88       $cc = parseAddrs($c);
  89       $bcc = parseAddrs($b);
  90       $reply_to = getPref($data_dir, $username, "reply_to");
  91       $from = getPref($data_dir, $username, "full_name");
  92       $from_addr = getPref($data_dir, $username, "email_address");
  93
  94       if ($from_addr == "")
  95          $from_addr = "$username@$domain";
  96
  97       $to_list = getLineOfAddrs($to);
  98       $cc_list = getLineOfAddrs($cc);
  99       $bcc_list = getLineOfAddrs($bcc);
 100
 101       if ($from == "")
 102          $from = "<$from_addr>";
 103       else
 104          $from = $from . " <$from_addr>";
 105
 106       /* This creates an RFC 822 date showing GMT */
 107       $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 108
 109       /* Make an RFC822 Received: line */
 110       fputs ($fp, "Received: from $REMOTE_ADDR by $SERVER_NAME with HTTP; ");
 111       fputs ($fp, "$date\n");
 112
 113       /* The rest of the header */
 114       fputs ($fp, "Date: $date\n");
 115       fputs ($fp, "Subject: $subject\n"); // Subject
 116       fputs ($fp, "From: $from\n"); // Subject
 117       fputs ($fp, "To: $to_list\n");    // Who it's TO
 118
 119       if ($cc_list) {
 120          fputs($fp, "Cc: $cc_list\n"); // Who the CCs are
 121       }
 122
 123       if ($reply_to != "")
 124          fputs($fp, "Reply-To: $reply_to\n");
 125
 126       if ($useSendmail) {
 127          if ($bcc_list) {
 128             // BCCs is removed from header by sendmail
 129             fputs($fp, "Bcc: $bcc_list\n");
 130          }
 131       }
 132
 133       fputs($fp, "X-Mailer: SquirrelMail (version $version)\n"); // Identify SquirrelMail
 134
 135       // Do the MIME-stuff
 136       fputs($fp, "MIME-Version: 1.0\n");
 137
 138       if (isMultipart()) {
 139          fputs ($fp, "Content-Type: multipart/mixed; boundary=\"");
 140          fputs ($fp, mimeBoundary());
 141          fputs ($fp, "\"\n");
 142       } else {
 143          fputs($fp, "Content-Type: text/plain; charset=ISO-8859-1\n");
 144          fputs($fp, "Content-Transfer-Encoding: 8bit\n");
 145       }
 146    }
 147
 148    // Send the body
 149    function writeBody ($fp, $body) {
 150      if (isMultipart()) {
 151         fputs ($fp, "--".mimeBoundary()."\n");
 152         fputs ($fp, "Content-Type: text/plain; charset=ISO-8859-1\n");
 153         fputs ($fp, "Content-Transfer-Encoding: 8bit\n\n");
 154         fputs ($fp, stripslashes($body) . "\n");
 155         attachFiles($fp);
 156         fputs ($fp, "\n--".mimeBoundary()."--\n");
 157      } else {
 158        fputs ($fp, stripslashes($body) . "\n");
 159      }
 160    }
 161
 162    // Send mail using the sendmail command
 163    function sendSendmail($t, $c, $b, $subject, $body) {
 164       global $sendmail_path, $username, $domain;
 165
 166       // open pipe to sendmail
 167       $fp = popen (escapeshellcmd("$sendmail_path -odb -oi -t -f$username@$domain"), "w");
 168
 169       write822Header ($fp, $t, $c, $b, $subject);
 170       writeBody($fp, $body);
 171
 172       pclose($fp);
 173    }
 174
 175    function smtpReadData($smtpConnection) {
 176       $read = fgets($smtpConnection, 1024);
 177       $counter = 0;
 178       while ($read) {
 179          echo $read . "<BR>";
 180          $data[$counter] = $read;
 181          $read = fgets($smtpConnection, 1024);
 182          $counter++;
 183       }
 184    }
 185
 186    function sendSMTP($t, $c, $b, $subject, $body) {
 187       global $username, $domain, $version, $smtpServerAddress, $smtpPort,
 188          $data_dir;
 189
 190       $to = parseAddrs($t);
 191       $cc = parseAddrs($c);
 192       $bcc = parseAddrs($b);
 193       $from_addr = getPref($data_dir, $username, "email_address");
 194
 195       if ($from_addr == "")
 196          $from_addr = "$username@$domain";
 197
 198       $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 199       if (!$smtpConnection) {
 200          echo "Error connecting to SMTP Server.<br>";
 201          echo "$errorNumber : $errorString<br>";
 202          exit;
 203       }
 204       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 205       errorCheck($tmp);
 206
 207       $to_list = getLineOfAddrs($to);
 208       $cc_list = getLineOfAddrs($cc);
 209
 210       /** Lets introduce ourselves */
 211       fputs($smtpConnection, "HELO $domain\n");
 212       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 213       errorCheck($tmp);
 214
 215       /** Ok, who is sending the message? */
 216       fputs($smtpConnection, "MAIL FROM:<$from_addr>\n");
 217       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 218       errorCheck($tmp);
 219
 220       /** send who the recipients are */
 221       for ($i = 0; $i < count($to); $i++) {
 222          fputs($smtpConnection, "RCPT TO:<$to[$i]>\n");
 223          $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 224          errorCheck($tmp);
 225       }
 226       for ($i = 0; $i < count($cc); $i++) {
 227          fputs($smtpConnection, "RCPT TO:<$cc[$i]>\n");
 228          $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 229          errorCheck($tmp);
 230       }
 231       for ($i = 0; $i < count($bcc); $i++) {
 232          fputs($smtpConnection, "RCPT TO:<$bcc[$i]>\n");
 233          $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 234          errorCheck($tmp);
 235       }
 236
 237       /** Lets start sending the actual message */
 238       fputs($smtpConnection, "DATA\n");
 239       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 240       errorCheck($tmp);
 241
 242       write822Header ($smtpConnection, $t, $c, $b, $subject);
 243
 244       writeBody($smtpConnection, $body); // send the body of the message
 245
 246       fputs($smtpConnection, ".\n"); // end the DATA part
 247       $tmp = nl2br(htmlspecialchars(fgets($smtpConnection, 1024)));
 248       $num = errorCheck($tmp);
 249       if ($num != 250) {
 250          echo "<HTML><BODY BGCOLOR=FFFFFF>ERROR<BR>Message not sent!<BR>Reason given: $tmp<BR></BODY></HTML>";
 251       }
 252
 253       fputs($smtpConnection, "QUIT\n"); // log off
 254
 255       fclose($smtpConnection);
 256    }
 257
 258
 259    function errorCheck($line) {
 260       // Status:  0 = fatal
 261       //          5 = ok
 262
 263       $err_num = substr($line, 0, strpos($line, " "));
 264       switch ($err_num) {
 265          case 500:   $message = "Syntax error; command not recognized";
 266                      $status = 0;
 267                      break;
 268          case 501:   $message = "Syntax error in parameters or arguments";
 269                      $status = 0;
 270                      break;
 271          case 502:   $message = "Command not implemented";
 272                      $status = 0;
 273                      break;
 274          case 503:   $message = "Bad sequence of commands";
 275                      $status = 0;
 276                      break;
 277          case 504:   $message = "Command parameter not implemented";
 278                      $status = 0;
 279                      break;
 280
 281
 282          case 211:   $message = "System status, or system help reply";
 283                      $status = 5;
 284                      break;
 285          case 214:   $message = "Help message";
 286                      $status = 5;
 287                      break;
 288
 289
 290          case 220:   $message = "Service ready";
 291                      $status = 5;
 292                      break;
 293          case 221:   $message = "Service closing transmission channel";
 294                      $status = 5;
 295                      break;
 296          case 421:   $message = "Service not available, closing chanel";
 297                      $status = 0;
 298                      break;
 299
 300
 301          case 250:   $message = "Requested mail action okay, completed";
 302                      $status = 5;
 303                      break;
 304          case 251:   $message = "User not local; will forward";
 305                      $status = 5;
 306                      break;
 307          case 450:   $message = "Requested mail action not taken:  mailbox unavailable";
 308                      $status = 0;
 309                      break;
 310          case 550:   $message = "Requested action not taken:  mailbox unavailable";
 311                      $status = 0;
 312                      break;
 313          case 451:   $message = "Requested action aborted:  error in processing";
 314                      $status = 0;
 315                      break;
 316          case 551:   $message = "User not local; please try forwarding";
 317                      $status = 0;
 318                      break;
 319          case 452:   $message = "Requested action not taken:  insufficient system storage";
 320                      $status = 0;
 321                      break;
 322          case 552:   $message = "Requested mail action aborted:  exceeding storage allocation";
 323                      $status = 0;
 324                      break;
 325          case 553:   $message = "Requested action not taken: mailbox name not allowed";
 326                      $status = 0;
 327                      break;
 328          case 354:   $message = "Start mail input; end with .";
 329                      $status = 5;
 330                      break;
 331          case 554:   $message = "Transaction failed";
 332                      $status = 0;
 333                      break;
 334          default:    $message = "Unknown response: $line";
 335                      $status = 0;
 336                      $error_num = "001";
 337                      break;
 338       }
 339
 340       if ($status == 0) {
 341          echo "<HTML><BODY BGCOLOR=FFFFFF>";
 342          echo "<TT>";
 343          echo "<BR><B>ERROR</B><BR><BR>";
 344          echo "&nbsp;&nbsp;&nbsp;<B>Error Number: </B>$err_num<BR>";
 345          echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Reason: </B>$message<BR>";
 346          echo "<B>Server Response: </B>$line<BR>";
 347          echo "<BR>MAIL NOT SENT";
 348          echo "</TT></BODY></HTML>";
 349          exit;
 350       }
 351       return $err_num;
 352    }
 353
 354    function sendMessage($t, $c, $b, $subject, $body) {
 355       global $useSendmail;
 356
 357       if ($useSendmail==true) {
 358          sendSendmail($t, $c, $b, $subject, $body);
 359       } else {
 360          sendSMTP($t, $c, $b, $subject, $body);
 361       }
 362
 363    }
 364
 365 ?>