functions/smtp.php

   1 <?php
   2
   3 /**
   4  * smtp.php
   5  *
   6  * Copyright (c) 1999-2002 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This contains all the functions needed to send messages through
  10  * an smtp server or sendmail.
  11  *
  12  * $Id$
  13  */
  14
  15 require_once(SM_PATH . 'functions/addressbook.php');
  16 require_once(SM_PATH . 'functions/plugin.php');
  17 require_once(SM_PATH . 'functions/prefs.php');
  18
  19 global $username, $popuser, $domain;
  20
  21 /* This should most probably go to some initialization... */
  22 if (ereg("^([^@%/]+)[@%/](.+)$", $username, $usernamedata)) {
  23     $popuser = $usernamedata[1];
  24     $domain  = $usernamedata[2];
  25     unset($usernamedata);
  26 } else {
  27     $popuser = $username;
  28 }
  29 /* We need domain for smtp */
  30 if (!$domain) {
  31     $domain = getenv('HOSTNAME');
  32 }
  33
  34 /* Returns true only if this message is multipart */
  35 function isMultipart ($session) {
  36     global $attachments;
  37
  38     foreach ($attachments as $info) {
  39         if ($info['session'] == $session) {
  40             return true;
  41         }
  42     }
  43     return false;
  44 }
  45
  46 /* looks up aliases in the addressbook and expands them to
  47  * the full address.
  48  *
  49  * Adds @$domain if it wasn't in the address book and if it
  50  * doesn't have an @ symbol in it
  51  */
  52 function expandAddrs ($array) {
  53     global $domain;
  54
  55     /* don't show errors -- kinda critical that we don't see
  56      * them here since the redirect won't work if we do show them
  57      */
  58     $abook = addressbook_init(false, true);
  59     for ($i=0; $i < count($array); $i++) {
  60         $result = $abook->lookup($array[$i]);
  61         $ret = "";
  62         if (isset($result['email'])) {
  63             if (isset($result['name'])) {
  64                 $ret = '"'.$result['name'].'" ';
  65             }
  66             $ret .= '<'.$result['email'].'>';
  67             $array[$i] = $ret;
  68         }
  69         else
  70         {
  71             if (strpos($array[$i], '@') === false) {
  72                 $array[$i] .= '@' . $domain;
  73             }
  74             $array[$i] = '<' . $array[$i] . '>';
  75         }
  76     }
  77     return $array;
  78 }
  79
  80 /* looks up aliases in the addressbook and expands them to
  81  * the RFC 821 valid RCPT address. ie <user@example.com>
  82  * Adds @$domain if it wasn't in the address book and if it
  83  * doesn't have an @ symbol in it
  84  */
  85 function expandRcptAddrs ($array) {
  86     global $domain;
  87
  88     /* don't show errors -- kinda critical that we don't see
  89      * them here since the redirect won't work if we do show them
  90      */
  91     $abook = addressbook_init(false, true);
  92     for ($i=0; $i < count($array); $i++) {
  93         $result = $abook->lookup($array[$i]);
  94         $ret = "";
  95         if (isset($result['email'])) {
  96             $ret = '<'.$result['email'].'>';
  97             $array[$i] = $ret;
  98         }
  99         else {
 100             if (strpos($array[$i], '@') === false) {
 101                 $array[$i] .= '@' . $domain;
 102             }
 103             $array[$i] = '<' . $array[$i] . '>';
 104         }
 105     }
 106     return $array;
 107 }
 108
 109
 110 /* Attach the files that are due to be attached
 111  */
 112 function attachFiles ($fp, $session, $rn="\r\n", $checkdot = false) {
 113     global $attachments, $attachment_dir, $username, $languages, $squirrelmail_language;
 114
 115     $length = 0;
 116
 117     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 118     if (isMultipart($session)) {
 119         foreach ($attachments as $info) {
 120             if ($info['session'] == $session) {
 121                 if (isset($info['type'])) {
 122                     $filetype = $info['type'];
 123                 }
 124                 else {
 125                     $filetype = 'application/octet-stream';
 126                 }
 127
 128                 $header = '--' . mimeBoundary() . "$rn";
 129                 if ( isset($info['remotefilename'])
 130                      && $info['remotefilename'] != '') {
 131                     $remotefilename = $info['remotefilename'];
 132                     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
 133                        function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
 134                         $remotefilename =
 135                             $languages[$squirrelmail_language]['XTRA_CODE']('encode', $remotefilename);
 136                     }
 137                     $header .= "Content-Type: $filetype; name=\"" .
 138                         encodeHeader($remotefilename) . "\"$rn";
 139                     $header .= "Content-Disposition: attachment; filename=\""
 140                         . encodeHeader($remotefilename) . "\"$rn";
 141                 } else {
 142                     $header .= "Content-Type: $filetype$rn";
 143                 }
 144
 145
 146                 /* Use 'rb' for NT systems -- read binary
 147                  * Unix doesn't care -- everything's binary!  :-)
 148                  */
 149
 150                 $filename = $hashed_attachment_dir . '/'
 151                     . $info['localfilename'];
 152                 $file = fopen ($filename, 'rb');
 153                 if (substr($filetype, 0, 5) == 'text/' ||
 154                     substr($filetype, 0, 8) == 'message/' ) {
 155                     $header .= $rn;
 156                     if ($fp) {
 157                         fputs ($fp, $header);
 158                     }
 159                     $length += strlen($header);
 160
 161                     if ($checkdot) {
 162                         $checkdot_begin=true;
 163                     } else {
 164                         $checkdot_begin=false;
 165                     }
 166
 167                     while ($tmp = fgets($file, 4096)) {
 168                         $tmp = str_replace("\r\n", "\n", $tmp);
 169                         $tmp = str_replace("\r", "\n", $tmp);
 170                         if ($rn == "\r\n"){
 171                             $tmp = str_replace("\n", "\r\n", $tmp);
 172                         }
 173                         if ($tmp{0} == '.' && $checkdot_begin) {
 174                             $tmp = '.' . $tmp;
 175                         }
 176                         if ($checkdot) {
 177                             $tmp = str_replace("\n.","\n..",$tmp);
 178                         }
 179
 180                         $tmp_length = strlen($tmp);
 181                         if ($tmp_length && $tmp{$tmp_length-1} == "\n" && $checkdot) {
 182                             $checkdot_begin = true;
 183                         } else {
 184                             $checkdot_begin = false;
 185                         }
 186
 187
 188                         if ($fp) {
 189                             fputs($fp, $tmp);
 190                         }
 191                         $length += $tmp_length;
 192                     }
 193                     if (substr($tmp, $tmp_length - strlen($rn), strlen($rn)) != $rn) {
 194                         if ($fp) {
 195                             fputs($fp, $rn);
 196                         }
 197                         $length += strlen($rn);
 198                     }
 199
 200
 201                 } else {
 202                     $header .= "Content-Transfer-Encoding: base64"
 203                         . "$rn" . "$rn";
 204                     if ($fp) fputs ($fp, $header);
 205                     $length += strlen($header);
 206                     while ($tmp = fread($file, 570)) {
 207                         $encoded = chunk_split(base64_encode($tmp));
 208                         $length += strlen($encoded);
 209                         if ($fp) fputs ($fp, $encoded);
 210                     }
 211                 }
 212                 fclose ($file);
 213             }
 214         }
 215     }
 216     return $length;
 217 }
 218
 219 /* Delete files that are uploaded for attaching
 220  */
 221 function deleteAttachments($session) {
 222     global $username, $attachments, $attachment_dir, $data_dir;
 223     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 224
 225     $rem_attachments = array();
 226     foreach ($attachments as $info) {
 227         if ($info['session'] == $session) {
 228             $attached_file = "$hashed_attachment_dir/$info[localfilename]";
 229             if (file_exists($attached_file)) {
 230                 unlink($attached_file);
 231             }
 232         } else {
 233             $rem_attachments[] = $info;
 234         }
 235     }
 236     $attachments = $rem_attachments;
 237     setPref($data_dir, $username, 'attachments', serialize($attachments));
 238 }
 239
 240 /* Return a nice MIME-boundary
 241  */
 242 function mimeBoundary () {
 243     static $mimeBoundaryString;
 244
 245     if ( !isset( $mimeBoundaryString ) ||
 246          $mimeBoundaryString == '') {
 247         $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
 248             mt_rand( 10000, 99999 );
 249     }
 250
 251     return $mimeBoundaryString;
 252 }
 253
 254 /* Time offset for correct timezone */
 255 function timezone () {
 256     global $invert_time;
 257
 258     $diff_second = date('Z');
 259     if ($invert_time) {
 260         $diff_second = - $diff_second;
 261     }
 262     if ($diff_second > 0) {
 263         $sign = '+';
 264     }
 265     else {
 266         $sign = '-';
 267     }
 268
 269     $diff_second = abs($diff_second);
 270
 271     $diff_hour = floor ($diff_second / 3600);
 272     $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 273
 274     $zonename = '('.strftime('%Z').')';
 275     $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
 276                        $zonename);
 277     return ($result);
 278 }
 279
 280 /* Print all the needed RFC822 headers */
 281 function write822Header ($fp, $t, $c, $b, $subject, $body, $more_headers, $session, $rn="\r\n") {
 282     global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 283     global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 284     global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 285     global $REMOTE_HOST, $identity;
 286
 287     /* Storing the header to make sure the header is the same
 288      * everytime the header is printed.
 289      */
 290     static $header, $headerlength, $headerrn;
 291
 292     if ($header == '') {
 293                 $headerrn = $rn;
 294         $to = expandAddrs(parseAddrs($t));
 295         $cc = expandAddrs(parseAddrs($c));
 296         $bcc = expandAddrs(parseAddrs($b));
 297         if (isset($identity) && $identity != 'default') {
 298             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 299             $from = getPref($data_dir, $username, 'full_name' . $identity);
 300             $from_addr = getFrom();
 301         } else {
 302             $reply_to = getPref($data_dir, $username, 'reply_to');
 303             $from = getPref($data_dir, $username, 'full_name');
 304             $from_addr = getFrom();
 305         }
 306
 307         $to_list = getLineOfAddrs($to);
 308         $cc_list = getLineOfAddrs($cc);
 309         $bcc_list = getLineOfAddrs($bcc);
 310
 311         /* Encoding 8-bit characters and making from line */
 312         $subject = encodeHeader($subject);
 313         if ($from == '') {
 314             $from = "<$from_addr>";
 315         }
 316         else {
 317             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 318         }
 319
 320         /* This creates an RFC 822 date */
 321         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 322
 323         /* Create a message-id */
 324         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 325         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 326
 327         /* Make an RFC822 Received: line */
 328         if (isset($REMOTE_HOST)) {
 329             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 330         }
 331         else {
 332             $received_from = $REMOTE_ADDR;
 333         }
 334
 335         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 336             if ($HTTP_X_FORWARDED_FOR == '') {
 337                 $HTTP_X_FORWARDED_FOR = 'unknown';
 338             }
 339             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 340         }
 341
 342         $header  = "Received: from $received_from" . $rn;
 343         $header .= "        (SquirrelMail authenticated user $username)" . $rn;
 344         $header .= "        by $SERVER_NAME with HTTP;" . $rn;
 345         $header .= "        $date" . $rn;
 346
 347         /* Insert the rest of the header fields */
 348         $header .= "Message-ID: $message_id" . $rn;
 349         $header .= "Date: $date" . $rn;
 350         $header .= "Subject: $subject" . $rn;
 351         $header .= "From: $from" . $rn;
 352         $header .= "To: $to_list" . $rn;    // Who it's TO
 353
 354         if (isset($more_headers["Content-Type"])) {
 355             $contentType = $more_headers["Content-Type"];
 356             unset($more_headers["Content-Type"]);
 357         }
 358         else {
 359             if (isMultipart($session)) {
 360                 $contentType = "multipart/mixed;";
 361             }
 362             else {
 363                 if ($default_charset != '') {
 364                     $contentType = 'text/plain; charset='.$default_charset;
 365                 }
 366                 else {
 367                     $contentType = 'text/plain;';
 368                 }
 369             }
 370         }
 371
 372         /* Insert headers from the $more_headers array */
 373         if(is_array($more_headers)) {
 374             reset($more_headers);
 375             while(list($h_name, $h_val) = each($more_headers)) {
 376                 if ($h_name == 'References') {
 377                     $h_val = str_replace(' ', "$rn        ", $h_val);
 378                 }
 379                 $header .= sprintf("%s: %s%s", $h_name, $h_val, $rn);
 380             }
 381         }
 382
 383         if ($cc_list) {
 384             $header .= "Cc: $cc_list" . $rn; // Who the CCs are
 385         }
 386
 387         if ($reply_to != '') {
 388             $header .= "Reply-To: $reply_to" . $rn;
 389         }
 390
 391         if ($useSendmail) {
 392             if ($bcc_list) {
 393                 // BCCs is removed from header by sendmail
 394                 $header .= "Bcc: $bcc_list" . $rn;
 395             }
 396         }
 397
 398         /* Identify SquirrelMail */
 399         $header .= "X-Mailer: SquirrelMail (version $version)" . $rn;
 400
 401         /* Do the MIME-stuff */
 402         $header .= "MIME-Version: 1.0" . $rn;
 403
 404         if (isMultipart($session)) {
 405             $header .= 'Content-Type: '.$contentType.' boundary="';
 406             $header .= mimeBoundary();
 407             $header .= "\"$rn";
 408         } else {
 409             if (strtolower($default_charset) == 'iso-2022-jp') {
 410                 if (mb_detect_encoding($body) == 'ASCII') {
 411                     $header .= 'Content-Type: text/plain; US-ASCII' . $rn;
 412                     $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 413                 } else {
 414                     $header .= 'Content-Type: '.$contentType . $rn;
 415                     $header .= "Content-Transfer-Encoding: 7bit" . $rn;
 416                 }
 417             } else {
 418             $header .= 'Content-Type: ' . $contentType . $rn;
 419             $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 420         }
 421         }
 422         $header .= $rn; // One blank line to separate header and body
 423
 424         $headerlength = strlen($header);
 425     }
 426
 427         if ($headerrn != $rn) {
 428                 $header = str_replace($headerrn, $rn, $header);
 429         $headerlength = strlen($header);
 430                 $headerrn = $rn;
 431         }
 432
 433     /* Write the header */
 434     if ($fp) fputs ($fp, $header);
 435
 436     return $headerlength;
 437 }
 438
 439 /* Send the body
 440  */
 441 function writeBody ($fp, $passedBody, $session, $rn="\r\n", $checkdot = false) {
 442     global $default_charset;
 443
 444     $attachmentlength = 0;
 445
 446     if (isMultipart($session)) {
 447         $body = '--'.mimeBoundary() . $rn;
 448
 449         if ($default_charset != "") {
 450             $body .= "Content-Type: text/plain; charset=$default_charset".$rn;
 451         }
 452         else {
 453             $body .= "Content-Type: text/plain" . $rn;
 454         }
 455
 456         if (strtolower($default_charset) == 'iso-2022-jp') {
 457             if (mb_detect_encoding($passedBody) == 'ASCII') {
 458                 $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn .
 459                          $passedBody . $rn . $rn;
 460             } else {
 461                 $body .= "Content-Transfer-Encoding: 7bit\r\n\r\n" .
 462                          mb_convert_encoding($passedBody, 'JIS') . "\r\n\r\n";
 463             }
 464         } else {
 465         $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn .
 466                  $passedBody . $rn . $rn;
 467         }
 468         if ($fp) {
 469             fputs ($fp, $body);
 470         }
 471
 472         $attachmentlength = attachFiles($fp, $session, $rn, $checkdot);
 473
 474         if (!isset($postbody)) {
 475             $postbody = "";
 476         }
 477         $postbody .= $rn . "--" . mimeBoundary() . "--" . $rn . $rn;
 478         if ($fp) fputs ($fp, $postbody);
 479     } else {
 480         if (strtolower($default_charset) == 'iso-2022-jp') {
 481             $body = mb_convert_encoding($passedBody, 'JIS') . $rn;
 482         } else {
 483             $body = $passedBody . $rn;
 484         }
 485         if ($fp) {
 486             fputs ($fp, $body);
 487         }
 488         $postbody = $rn;
 489         if ($fp) {
 490             fputs ($fp, $postbody);
 491         }
 492     }
 493
 494     return (strlen($body) + strlen($postbody) + $attachmentlength);
 495 }
 496
 497
 498 /* Send mail using the sendmail command
 499  */
 500 function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) {
 501     global $sendmail_path, $popuser, $username, $domain;
 502
 503     /* Build envelope sender address. Make sure it doesn't contain
 504      * spaces or other "weird" chars that would allow a user to
 505      * exploit the shell/pipe it is used in.
 506      */
 507     $envelopefrom = getFrom();
 508     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 509     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 510     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 511
 512     /**
 513      * open pipe to sendmail or qmail-inject
 514      * (qmail-inject doesn't accept -t param)
 515      */
 516     if (strstr($sendmail_path, "qmail-inject")) {
 517         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 518     } else {
 519         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 520     }
 521
 522     $headerlength = write822Header ($fp, $t, $c, $b, $subject, $body,
 523                                     $more_headers, $session, "\n");
 524     $bodylength = writeBody($fp, $body, $session, "\n", true);
 525
 526     pclose($fp);
 527
 528     return ($headerlength + $bodylength);
 529 }
 530
 531 function smtpReadData($smtpConnection) {
 532     $read = fgets($smtpConnection, 1024);
 533     $counter = 0;
 534     while ($read) {
 535         echo $read . '<BR>';
 536         $data[$counter] = $read;
 537         $read = fgets($smtpConnection, 1024);
 538         $counter++;
 539     }
 540 }
 541
 542 function sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session) {
 543     global $username, $popuser, $domain, $version, $smtpServerAddress,
 544         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 545         $key, $onetimepad;
 546
 547     $to = expandRcptAddrs(parseAddrs($t));
 548     $cc = expandRcptAddrs(parseAddrs($c));
 549     $bcc = expandRcptAddrs(parseAddrs($b));
 550     if (isset($identity) && $identity != 'default') {
 551         $from_addr = getPref($data_dir, $username,
 552                              'email_address' . $identity);
 553     }
 554     else {
 555         $from_addr = getPref($data_dir, $username, 'email_address');
 556     }
 557
 558     if (!$from_addr) {
 559         $from_addr = "$popuser@$domain";
 560     }
 561
 562     /* POP3 BEFORE SMTP CODE HERE */
 563     global $pop_before_smtp;
 564     if (isset($pop_before_smtp) && $pop_before_smtp === true) {
 565         if (!isset($pop_port)) {
 566             $pop_port = 110;
 567         }
 568         if (!isset($pop_server)) {
 569             $pop_server = $smtpServerAddress; /* usually the same host! */
 570         }
 571         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 572         if (!$popConnection) {
 573             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 574                   . " $err_no : $err_str");
 575         } else {
 576             $tmp = fgets($popConnection, 1024); /* banner */
 577             if (!eregi("^\+OK", $tmp, $regs)) {
 578                 return(0);
 579             }
 580             fputs($popConnection, "USER $username\r\n");
 581             $tmp = fgets($popConnection, 1024);
 582             if (!eregi("^\+OK", $tmp, $regs)) {
 583                 return(0);
 584             }
 585             fputs($popConnection, 'PASS ' . OneTimePadDecrypt($key, $onetimepad) . "\r\n");
 586             $tmp = fgets($popConnection, 1024);
 587             if (!eregi("^\+OK", $tmp, $regs)) {
 588                 return(0);
 589             }
 590             fputs($popConnection, "QUIT\r\n"); /* log off */
 591             fclose($popConnection);
 592         }
 593     }
 594
 595     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort,
 596                                 $errorNumber, $errorString);
 597     if (!$smtpConnection) {
 598         echo 'Error connecting to SMTP Server.<br>';
 599         echo "$errorNumber : $errorString<br>";
 600         exit;
 601     }
 602     $tmp = fgets($smtpConnection, 1024);
 603     if (errorCheck($tmp, $smtpConnection)!=5) {
 604         return(0);
 605     }
 606
 607     $to_list = getLineOfAddrs($to);
 608     $cc_list = getLineOfAddrs($cc);
 609
 610     /* Lets introduce ourselves */
 611     if (! isset ($use_authenticated_smtp)
 612         || $use_authenticated_smtp == false) {
 613         fputs($smtpConnection, "HELO $domain\r\n");
 614         $tmp = fgets($smtpConnection, 1024);
 615         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 616     } else {
 617         fputs($smtpConnection, "EHLO $domain\r\n");
 618         $tmp = fgets($smtpConnection, 1024);
 619         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 620
 621         fputs($smtpConnection, "AUTH LOGIN\r\n");
 622         $tmp = fgets($smtpConnection, 1024);
 623         if (errorCheck($tmp, $smtpConnection)!=5) {
 624             return(0);
 625         }
 626
 627         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 628         $tmp = fgets($smtpConnection, 1024);
 629         if (errorCheck($tmp, $smtpConnection)!=5) {
 630             return(0);
 631         }
 632
 633         fputs($smtpConnection, base64_encode
 634               (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 635         $tmp = fgets($smtpConnection, 1024);
 636         if (errorCheck($tmp, $smtpConnection)!=5) {
 637             return(0);
 638         }
 639     }
 640
 641     /* Ok, who is sending the message? */
 642     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 643     $tmp = fgets($smtpConnection, 1024);
 644     if (errorCheck($tmp, $smtpConnection)!=5) {
 645         return(0);
 646     }
 647
 648     /* send who the recipients are */
 649     for ($i = 0; $i < count($to); $i++) {
 650         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 651         $tmp = fgets($smtpConnection, 1024);
 652         if (errorCheck($tmp, $smtpConnection)!=5) {
 653             return(0);
 654         }
 655     }
 656     for ($i = 0; $i < count($cc); $i++) {
 657         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 658         $tmp = fgets($smtpConnection, 1024);
 659         if (errorCheck($tmp, $smtpConnection)!=5) {
 660             return(0);
 661         }
 662     }
 663     for ($i = 0; $i < count($bcc); $i++) {
 664         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 665         $tmp = fgets($smtpConnection, 1024);
 666         if (errorCheck($tmp, $smtpConnection)!=5) {
 667             return(0);
 668         }
 669     }
 670
 671     /* Lets start sending the actual message */
 672     fputs($smtpConnection, "DATA\r\n");
 673     $tmp = fgets($smtpConnection, 1024);
 674     if (errorCheck($tmp, $smtpConnection)!=5) {
 675         return(0);
 676     }
 677
 678     /* Send the message */
 679     $headerlength = write822Header ($smtpConnection, $t, $c, $b,
 680                                     $subject, $body, $more_headers, $session);
 681     $bodylength = writeBody($smtpConnection, $body, $session,"\r\n", true);
 682
 683     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 684     $tmp = fgets($smtpConnection, 1024);
 685     $num = errorCheck($tmp, $smtpConnection, true);
 686     if ($num != 250) {
 687         return(0);
 688     }
 689
 690     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 691
 692     fclose($smtpConnection);
 693
 694     return ($headerlength + $bodylength);
 695 }
 696
 697
 698 function errorCheck($line, $smtpConnection, $verbose = false) {
 699     global $color, $compose_new_win;
 700
 701     /* Read new lines on a multiline response */
 702     $lines = $line;
 703     while(ereg("^[0-9]+-", $line)) {
 704         $line = fgets($smtpConnection, 1024);
 705         $lines .= $line;
 706     }
 707
 708     /* Status:  0 = fatal
 709      *          5 = ok
 710      */
 711     $err_num = substr($line, 0, strpos($line, " "));
 712     switch ($err_num) {
 713     case 500:   $message = 'Syntax error; command not recognized';
 714         $status = 0;
 715         break;
 716     case 501:   $message = 'Syntax error in parameters or arguments';
 717         $status = 0;
 718         break;
 719     case 502:   $message = 'Command not implemented';
 720         $status = 0;
 721         break;
 722     case 503:   $message = 'Bad sequence of commands';
 723         $status = 0;
 724         break;
 725     case 504:   $message = 'Command parameter not implemented';
 726         $status = 0;
 727         break;
 728
 729     case 211:   $message = 'System status, or system help reply';
 730         $status = 5;
 731         break;
 732     case 214:   $message = 'Help message';
 733         $status = 5;
 734         break;
 735
 736     case 220:   $message = 'Service ready';
 737         $status = 5;
 738         break;
 739     case 221:   $message = 'Service closing transmission channel';
 740         $status = 5;
 741         break;
 742
 743     case 421:   $message = 'Service not available, closing chanel';
 744         $status = 0;
 745         break;
 746
 747     case 235:   return(5);
 748         break;
 749     case 250:   $message = 'Requested mail action okay, completed';
 750         $status = 5;
 751         break;
 752     case 251:   $message = 'User not local; will forward';
 753         $status = 5;
 754         break;
 755     case 334:   return(5); break;
 756     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 757         $status = 0;
 758         break;
 759     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 760         $status = 0;
 761         break;
 762     case 451:   $message = 'Requested action aborted:  error in processing';
 763         $status = 0;
 764         break;
 765     case 551:   $message = 'User not local; please try forwarding';
 766         $status = 0;
 767         break;
 768     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 769         $status = 0;
 770         break;
 771     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 772         $status = 0;
 773         break;
 774     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 775         $status = 0;
 776         break;
 777     case 354:   $message = 'Start mail input; end with .';
 778         $status = 5;
 779         break;
 780     case 554:   $message = 'Transaction failed';
 781         $status = 0;
 782         break;
 783     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 784         $status = 0;
 785         $error_num = '001';
 786         break;
 787     }
 788
 789     if ($status == 0) {
 790         include_once(SM_PATH . 'functions/page_header.php');
 791         if ($compose_new_win == '1') {
 792             compose_Header($color, 'None');
 793         }
 794         else {
 795             displayPageHeader($color, 'None');
 796         }
 797         include_once(SM_PATH . 'functions/display_messages.php');
 798         $lines = nl2br(htmlspecialchars($lines));
 799         $msg  = $message . "<br>\nServer replied: $lines";
 800         plain_error_message($msg, $color);
 801     }
 802     if (! $verbose) return $status;
 803     return $err_num;
 804 }
 805
 806 /* create new reference header per rfc2822 */
 807
 808 function calculate_references($refs, $inreplyto, $old_reply_to) {
 809
 810     $refer = "";
 811     for ($i=1;$i<count($refs[0]);$i++) {
 812         if (!empty($refs[0][$i])) {
 813             if (preg_match("/^References:(.+)$/UAi", $refs[0][$i], $regs)) {
 814                 $refer = trim($regs[1]);
 815             }
 816             else {
 817                 $refer .= ' ' . trim($refs[0][$i]);
 818             }
 819         }
 820     }
 821     $refer_a = explode(' ', $refer);
 822     $refer = '';
 823     foreach ($refer_a as $ref) {
 824        $ref = trim($ref);
 825        if ($ref && $ref{0} == '<' && $ref{(strlen($ref)-1)} == '>') {
 826           $refer .= $ref . ' ';
 827        }
 828     }
 829     $refer = trim($refer);
 830     if (strlen($refer) > 2) {
 831         $refer .= ' ' . $inreplyto;
 832     }
 833     else {
 834         if (!empty($old_reply_to)) {
 835             $refer .= $old_reply_to . ' ' . $inreplyto;
 836         }
 837         else {
 838             $refer .= $inreplyto;
 839         }
 840     }
 841     trim($refer);
 842     return $refer;
 843 }
 844
 845 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN,
 846                      $prio = 3, $session) {
 847     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 848         $data_dir, $username, $domain, $key, $version, $sent_folder,
 849         $imapServerAddress, $imapPort, $default_use_priority, $more_headers,
 850         $request_mdn, $request_dr, $uid_support;
 851
 852     $more_headers = Array();
 853
 854     do_hook('smtp_send');
 855
 856     $imap_stream = sqimap_login($username, $key, $imapServerAddress,
 857                                 $imapPort, 1);
 858
 859     if (isset($reply_id) && $reply_id) {
 860         sqimap_mailbox_select ($imap_stream, $mailbox);
 861         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered', true);
 862
 863         /* Insert In-Reply-To and References headers if the
 864          * message-id of the message we reply to is set (longer than "<>")
 865          * The References header should really be the old Referenced header
 866          * with the message ID appended, and now it is (jmunro)
 867          */
 868         $sid = sqimap_session_id($uid_support);
 869         $query = "$sid FETCH $reply_id (BODY.PEEK[HEADER.FIELDS (Message-Id In-Reply-To)])\r\n";
 870         fputs ($imap_stream, $query);
 871         $read = sqimap_read_data($imap_stream, $sid, true, $response, $message);
 872         $message_id = '';
 873         $in_reply_to = '';
 874
 875         foreach ($read as $r) {
 876                 if (preg_match("/^message-id:(.*)/iA", $r, $regs)) {
 877                     $message_id = trim($regs[1]);
 878                 }
 879                 if (preg_match("/^in-reply-to:(.*)/iA", $r, $regs)) {
 880                     $in_reply_to = trim($regs[1]);
 881                 }
 882         }
 883
 884         if(strlen($message_id) > 2) {
 885             $refs = get_reference_header ($imap_stream, $reply_id);
 886             $inreplyto = $message_id;
 887             $old_reply_to = $in_reply_to;
 888             $refer = calculate_references ($refs, $inreplyto, $old_reply_to);
 889             $more_headers['In-Reply-To'] = $inreplyto;
 890             $more_headers['References']  = $refer;
 891         }
 892
 893     }
 894     if ($default_use_priority) {
 895         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 896     }
 897
 898     $requestRecipt = 0;
 899     if (isset($request_dr)) {
 900         $requestRecipt += 1;
 901     }
 902     if (isset($request_mdn)) {
 903         $requestRecipt += 2;
 904     }
 905     if ( $requestRecipt > 0) {
 906         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 907     }
 908     if ($MDN) {
 909         $more_headers["Content-Type"] = "multipart/report; ".
 910             "report-type=disposition-notification;";
 911     }
 912     $imap_body = $body;
 913     if ($useSendmail) {
 914         /* In order to remove the problem of users not able to create
 915          * messages with "." on a blank line, RFC821 has made provision
 916          * in section 4.5.2 (Transparency).
 917          */
 918          if (($body && $body{0} == '.')) {
 919              $body = '.' . $body;
 920          }
 921          $body = str_replace("\n.","\n..",$body);
 922          $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers,
 923                                $session);
 924     } else {
 925        /* In order to remove the problem of users not able to create
 926         * messages with "." on a blank line, RFC821 has made provision
 927         * in section 4.5.2 (Transparency).
 928         */
 929         if (($body && $body{0} == '.')) {
 930             $body = '.' . $body;
 931         }
 932         $body = str_replace("\n.","\n..",$body);
 933         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers,
 934                            $session);
 935     }
 936     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 937         $body = $imap_body;
 938         $body = ereg_replace("\n", "\r\n", $body);
 939         $headerlength = write822Header (false, $t, $c, $b, $subject, $body, $more_headers, $session, "\r\n");
 940         $bodylength = writeBody(false, $body, $session, "\r\n");
 941         $length = $headerlength + $bodylength;
 942         sqimap_append ($imap_stream, $sent_folder, $length);
 943         write822Header ($imap_stream, $t, $c, $b, $subject, $body, $more_headers,
 944                         $session);
 945         writeBody ($imap_stream, $body, $session);
 946         sqimap_append_done ($imap_stream);
 947     }
 948     sqimap_logout($imap_stream);
 949     /* Delete the files uploaded for attaching (if any).
 950      * only if $length != 0 (if there was no error)
 951      */
 952     if ($length) {
 953         ClearAttachments($session);
 954     }
 955     return $length;
 956 }
 957
 958 function createPriorityHeaders($prio) {
 959     $prio_headers = Array();
 960     $prio_headers['X-Priority'] = $prio;
 961
 962     switch($prio) {
 963     case 1:
 964         $prio_headers['Importance'] = 'High';
 965         break;
 966
 967     case 3:
 968         $prio_headers['Importance'] = 'Normal';
 969         break;
 970
 971     case 5:
 972         $prio_headers['Importance'] = 'Low';
 973         break;
 974     }
 975     return  $prio_headers;
 976 }
 977
 978 function createReceiptHeaders($receipt) {
 979
 980     GLOBAL $data_dir, $username, $identity, $popuser, $domain;
 981
 982     $receipt_headers = Array();
 983     if (isset($identity) && $identity != 'default') {
 984         $from = getPref($data_dir, $username, 'full_name' . $identity);
 985         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 986     } else {
 987         $from = getPref($data_dir, $username, 'full_name');
 988         $from_addr = getPref($data_dir, $username, 'email_address');
 989     }
 990     if ($from_addr == '') {
 991         $from_addr = $popuser.'@'.$domain;
 992     }
 993
 994     if ($from == '') {
 995         $from = "<$from_addr>";
 996     }
 997     else {
 998         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 999     }
1000
1001     /* On Delivery */
1002     if ( $receipt == 1
1003         || $receipt == 3 ) {
1004         $receipt_headers["Return-Receipt-To"] = $from;
1005     }
1006     /* On Read */
1007     if ($receipt == 2
1008         || $receipt == 3 ) {
1009         /* Pegasus Mail */
1010         $receipt_headers["X-Confirm-Reading-To"] = $from;
1011         /* RFC 2298 */
1012         $receipt_headers["Disposition-Notification-To"] = $from;
1013     }
1014     return $receipt_headers;
1015 }
1016
1017 /* Figure out what the 'From:' address is
1018  */
1019
1020 function getFrom() {
1021     global $username, $popuser, $domain, $data_dir, $identity;
1022     if (isset($identity) && $identity != 'default') {
1023         $from_addr = getPref($data_dir, $username,
1024                              'email_address' . $identity);
1025     }
1026     else {
1027         $from_addr = getPref($data_dir, $username, 'email_address');
1028     }
1029
1030     if (!$from_addr) {
1031         $from_addr = "$popuser@$domain";
1032     }
1033     return $from_addr;
1034 }
1035
1036
1037 ?>