| | 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('../functions/addressbook.php'); |
| | 16 | require_once('../functions/plugin.php'); |
| | 17 | require_once('../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 $array; |
| | 78 | } |
| | 79 | |
| | 80 | |
| | 81 | /* looks up aliases in the addressbook and expands them to |
| | 82 | * the RFC 821 valid RCPT address. ie <user@example.com> |
| | 83 | * Adds @$domain if it wasn't in the address book and if it |
| | 84 | * doesn't have an @ symbol in it |
| | 85 | */ |
| | 86 | function expandRcptAddrs ($array) { |
| | 87 | global $domain; |
| | 88 | |
| | 89 | /* don't show errors -- kinda critical that we don't see |
| | 90 | * them here since the redirect won't work if we do show them |
| | 91 | */ |
| | 92 | $abook = addressbook_init(false, true); |
| | 93 | for ($i=0; $i < count($array); $i++) { |
| | 94 | $result = $abook->lookup($array[$i]); |
| | 95 | $ret = ""; |
| | 96 | if (isset($result['email'])) { |
| | 97 | $ret = '<'.$result['email'].'>'; |
| | 98 | $array[$i] = $ret; |
| | 99 | } |
| | 100 | else { |
| | 101 | if (strpos($array[$i], '@') === false) { |
| | 102 | $array[$i] .= '@' . $domain; |
| | 103 | } |
| | 104 | $array[$i] = '<' . $array[$i] . '>'; |
| | 105 | } |
| | 106 | } |
| | 107 | return $array; |
| | 108 | } |
| | 109 | |
| | 110 | |
| | 111 | /* Attach the files that are due to be attached |
| | 112 | */ |
| | 113 | function attachFiles ($fp, $session, $rn="\r\n", $checkdot = false) { |
| | 114 | global $attachments, $attachment_dir, $username, $languages, $squirrelmail_language; |
| | 115 | |
| | 116 | $length = 0; |
| | 117 | |
| | 118 | $hashed_attachment_dir = getHashedDir($username, $attachment_dir); |
| | 119 | if (isMultipart($session)) { |
| | 120 | foreach ($attachments as $info) { |
| | 121 | if ($info['session'] == $session) { |
| | 122 | if (isset($info['type'])) { |
| | 123 | $filetype = $info['type']; |
| | 124 | } |
| | 125 | else { |
| | 126 | $filetype = 'application/octet-stream'; |
| | 127 | } |
| | 128 | |
| | 129 | $header = '--' . mimeBoundary() . "$rn"; |
| | 130 | if ( isset($info['remotefilename']) |
| | 131 | && $info['remotefilename'] != '') { |
| | 132 | $remotefilename = $info['remotefilename']; |
| | 133 | if (function_exists($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 | if ($checkdot) { |
| | 161 | $checkdot_begin=true; |
| | 162 | } else { |
| | 163 | $checkdot_begin=false; |
| | 164 | } |
| | 165 | while ($tmp = fgets($file, 4096)) { |
| | 166 | $tmp = str_replace("\r\n", "\n", $tmp); |
| | 167 | $tmp = str_replace("\r", "\n", $tmp); |
| | 168 | /* In order to remove the problem of users not able to create |
| | 169 | * messages with "." on a blank line, RFC821 has made provision |
| | 170 | * in section 4.5.2 (Transparency). |
| | 171 | */ |
| | 172 | if ($tmp{0} == '.' && $checkdot_begin) { |
| | 173 | $tmp = '.' . $tmp; |
| | 174 | } |
| | 175 | if ($checkdot) { |
| | 176 | $tmp = str_replace("\n.","\n..",$tmp); |
| | 177 | } |
| | 178 | |
| | 179 | if ($rn == "\r\n"){ |
| | 180 | $tmp = str_replace("\n", "\r\n", $tmp); |
| | 181 | } |
| | 182 | $tmp_length = strlen($tmp); |
| | 183 | if ($tmp{$tmp_length-1} == "\n" && $checkdot) { |
| | 184 | $checkdot_begin = true; |
| | 185 | } else { |
| | 186 | $checkdot_begin = false; |
| | 187 | } |
| | 188 | if ($fp) { |
| | 189 | fputs($fp, $tmp); |
| | 190 | } |
| | 191 | $length += strlen($tmp_length); |
| | 192 | } |
| | 193 | |
| | 194 | if (substr($tmp, strlen($tmp) - strlen($rn), strlen($rn)) != $rn) { |
| | 195 | if ($fp) { |
| | 196 | fputs($fp, $rn); |
| | 197 | } |
| | 198 | } |
| | 199 | } else { |
| | 200 | $header .= "Content-Transfer-Encoding: base64" |
| | 201 | . "$rn" . "$rn"; |
| | 202 | if ($fp) fputs ($fp, $header); |
| | 203 | $length += strlen($header); |
| | 204 | while ($tmp = fread($file, 570)) { |
| | 205 | $encoded = chunk_split(base64_encode($tmp)); |
| | 206 | $length += strlen($encoded); |
| | 207 | if ($fp) fputs ($fp, $encoded); |
| | 208 | } |
| | 209 | } |
| | 210 | fclose ($file); |
| | 211 | } |
| | 212 | } |
| | 213 | } |
| | 214 | return $length; |
| | 215 | } |
| | 216 | |
| | 217 | /* Delete files that are uploaded for attaching |
| | 218 | */ |
| | 219 | function deleteAttachments($session) { |
| | 220 | global $username, $attachments, $attachment_dir, $data_dir; |
| | 221 | $hashed_attachment_dir = getHashedDir($username, $attachment_dir); |
| | 222 | |
| | 223 | $rem_attachments = array(); |
| | 224 | foreach ($attachments as $info) { |
| | 225 | if ($info['session'] == $session) { |
| | 226 | $attached_file = "$hashed_attachment_dir/$info[localfilename]"; |
| | 227 | if (file_exists($attached_file)) { |
| | 228 | unlink($attached_file); |
| | 229 | } |
| | 230 | } else { |
| | 231 | $rem_attachments[] = $info; |
| | 232 | } |
| | 233 | } |
| | 234 | $attachments = $rem_attachments; |
| | 235 | setPref($data_dir, $username, 'attachments', serialize($attachments)); |
| | 236 | } |
| | 237 | |
| | 238 | /* Return a nice MIME-boundary |
| | 239 | */ |
| | 240 | function mimeBoundary () { |
| | 241 | static $mimeBoundaryString; |
| | 242 | |
| | 243 | if ( !isset( $mimeBoundaryString ) || |
| | 244 | $mimeBoundaryString == '') { |
| | 245 | $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' . |
| | 246 | mt_rand( 10000, 99999 ); |
| | 247 | } |
| | 248 | |
| | 249 | return $mimeBoundaryString; |
| | 250 | } |
| | 251 | |
| | 252 | /* Time offset for correct timezone */ |
| | 253 | function timezone () { |
| | 254 | global $invert_time; |
| | 255 | |
| | 256 | $diff_second = date('Z'); |
| | 257 | if ($invert_time) { |
| | 258 | $diff_second = - $diff_second; |
| | 259 | } |
| | 260 | if ($diff_second > 0) { |
| | 261 | $sign = '+'; |
| | 262 | } |
| | 263 | else { |
| | 264 | $sign = '-'; |
| | 265 | } |
| | 266 | |
| | 267 | $diff_second = abs($diff_second); |
| | 268 | |
| | 269 | $diff_hour = floor ($diff_second / 3600); |
| | 270 | $diff_minute = floor (($diff_second-3600*$diff_hour) / 60); |
| | 271 | |
| | 272 | $zonename = '('.strftime('%Z').')'; |
| | 273 | $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, |
| | 274 | $zonename); |
| | 275 | return ($result); |
| | 276 | } |
| | 277 | |
| | 278 | /* Print all the needed RFC822 headers */ |
| | 279 | function write822Header ($fp, $t, $c, $b, $subject, $body, $more_headers, $session, $rn="\r\n") { |
| | 280 | global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT; |
| | 281 | global $data_dir, $username, $popuser, $domain, $version, $useSendmail; |
| | 282 | global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR; |
| | 283 | global $REMOTE_HOST, $identity; |
| | 284 | |
| | 285 | /* Storing the header to make sure the header is the same |
| | 286 | * everytime the header is printed. |
| | 287 | */ |
| | 288 | static $header, $headerlength, $headerrn; |
| | 289 | |
| | 290 | if ($header == '') { |
| | 291 | $headerrn = $rn; |
| | 292 | $to = expandAddrs(parseAddrs($t)); |
| | 293 | $cc = expandAddrs(parseAddrs($c)); |
| | 294 | $bcc = expandAddrs(parseAddrs($b)); |
| | 295 | if (isset($identity) && $identity != 'default') { |
| | 296 | $reply_to = getPref($data_dir, $username, 'reply_to' . $identity); |
| | 297 | $from = getPref($data_dir, $username, 'full_name' . $identity); |
| | 298 | $from_addr = getFrom(); |
| | 299 | } else { |
| | 300 | $reply_to = getPref($data_dir, $username, 'reply_to'); |
| | 301 | $from = getPref($data_dir, $username, 'full_name'); |
| | 302 | $from_addr = getFrom(); |
| | 303 | } |
| | 304 | |
| | 305 | $to_list = getLineOfAddrs($to); |
| | 306 | $cc_list = getLineOfAddrs($cc); |
| | 307 | $bcc_list = getLineOfAddrs($bcc); |
| | 308 | |
| | 309 | /* Encoding 8-bit characters and making from line */ |
| | 310 | $subject = encodeHeader($subject); |
| | 311 | if ($from == '') { |
| | 312 | $from = "<$from_addr>"; |
| | 313 | } |
| | 314 | else { |
| | 315 | $from = '"' . encodeHeader($from) . "\" <$from_addr>"; |
| | 316 | } |
| | 317 | |
| | 318 | /* This creates an RFC 822 date */ |
| | 319 | $date = date("D, j M Y H:i:s ", mktime()) . timezone(); |
| | 320 | |
| | 321 | /* Create a message-id */ |
| | 322 | $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.'; |
| | 323 | $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>'; |
| | 324 | |
| | 325 | /* Make an RFC822 Received: line */ |
| | 326 | if (isset($REMOTE_HOST)) { |
| | 327 | $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])"; |
| | 328 | } |
| | 329 | else { |
| | 330 | $received_from = $REMOTE_ADDR; |
| | 331 | } |
| | 332 | |
| | 333 | if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) { |
| | 334 | if ($HTTP_X_FORWARDED_FOR == '') { |
| | 335 | $HTTP_X_FORWARDED_FOR = 'unknown'; |
| | 336 | } |
| | 337 | $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)"; |
| | 338 | } |
| | 339 | |
| | 340 | $header = "Received: from $received_from" . $rn; |
| | 341 | $header .= " (SquirrelMail authenticated user $username)" . $rn; |
| | 342 | $header .= " by $SERVER_NAME with HTTP;" . $rn; |
| | 343 | $header .= " $date" . $rn; |
| | 344 | |
| | 345 | /* Insert the rest of the header fields */ |
| | 346 | $header .= "Message-ID: $message_id" . $rn; |
| | 347 | $header .= "Date: $date" . $rn; |
| | 348 | $header .= "Subject: $subject" . $rn; |
| | 349 | $header .= "From: $from" . $rn; |
| | 350 | $header .= "To: $to_list" . $rn; // Who it's TO |
| | 351 | |
| | 352 | if (isset($more_headers["Content-Type"])) { |
| | 353 | $contentType = $more_headers["Content-Type"]; |
| | 354 | unset($more_headers["Content-Type"]); |
| | 355 | } |
| | 356 | else { |
| | 357 | if (isMultipart($session)) { |
| | 358 | $contentType = "multipart/mixed;"; |
| | 359 | } |
| | 360 | else { |
| | 361 | if ($default_charset != '') { |
| | 362 | $contentType = 'text/plain; charset='.$default_charset; |
| | 363 | } |
| | 364 | else { |
| | 365 | $contentType = 'text/plain;'; |
| | 366 | } |
| | 367 | } |
| | 368 | } |
| | 369 | |
| | 370 | /* Insert headers from the $more_headers array */ |
| | 371 | if(is_array($more_headers)) { |
| | 372 | reset($more_headers); |
| | 373 | while(list($h_name, $h_val) = each($more_headers)) { |
| | 374 | if ($h_name == 'References') { |
| | 375 | $h_val = str_replace(' ', "$rn ", $h_val); |
| | 376 | } |
| | 377 | $header .= sprintf("%s: %s%s", $h_name, $h_val, $rn); |
| | 378 | } |
| | 379 | } |
| | 380 | |
| | 381 | if ($cc_list) { |
| | 382 | $header .= "Cc: $cc_list" . $rn; // Who the CCs are |
| | 383 | } |
| | 384 | |
| | 385 | if ($reply_to != '') { |
| | 386 | $header .= "Reply-To: $reply_to" . $rn; |
| | 387 | } |
| | 388 | |
| | 389 | if ($useSendmail) { |
| | 390 | if ($bcc_list) { |
| | 391 | // BCCs is removed from header by sendmail |
| | 392 | $header .= "Bcc: $bcc_list" . $rn; |
| | 393 | } |
| | 394 | } |
| | 395 | |
| | 396 | /* Identify SquirrelMail */ |
| | 397 | $header .= "X-Mailer: SquirrelMail (version $version)" . $rn; |
| | 398 | |
| | 399 | /* Do the MIME-stuff */ |
| | 400 | $header .= "MIME-Version: 1.0" . $rn; |
| | 401 | |
| | 402 | if (isMultipart($session)) { |
| | 403 | $header .= 'Content-Type: '.$contentType.' boundary="'; |
| | 404 | $header .= mimeBoundary(); |
| | 405 | $header .= "\"$rn"; |
| | 406 | } else { |
| | 407 | if (strtolower($default_charset) == 'iso-2022-jp') { |
| | 408 | if (mb_detect_encoding($body) == 'ASCII') { |
| | 409 | $header .= 'Content-Type: text/plain; US-ASCII' . $rn; |
| | 410 | $header .= "Content-Transfer-Encoding: 8bit" . $rn; |
| | 411 | } else { |
| | 412 | $header .= 'Content-Type: '.$contentType . $rn; |
| | 413 | $header .= "Content-Transfer-Encoding: 7bit" . $rn; |
| | 414 | } |
| | 415 | } else { |
| | 416 | $header .= 'Content-Type: ' . $contentType . $rn; |
| | 417 | $header .= "Content-Transfer-Encoding: 8bit" . $rn; |
| | 418 | } |
| | 419 | } |
| | 420 | $header .= $rn; // One blank line to separate header and body |
| | 421 | |
| | 422 | $headerlength = strlen($header); |
| | 423 | } |
| | 424 | |
| | 425 | if ($headerrn != $rn) { |
| | 426 | $header = str_replace($headerrn, $rn, $header); |
| | 427 | $headerlength = strlen($header); |
| | 428 | $headerrn = $rn; |
| | 429 | } |
| | 430 | |
| | 431 | /* Write the header */ |
| | 432 | if ($fp) fputs ($fp, $header); |
| | 433 | |
| | 434 | return $headerlength; |
| | 435 | } |
| | 436 | |
| | 437 | /* Send the body |
| | 438 | */ |
| | 439 | function writeBody ($fp, $passedBody, $session, $rn="\r\n", $checkdot = false) { |
| | 440 | global $default_charset; |
| | 441 | |
| | 442 | $attachmentlength = 0; |
| | 443 | |
| | 444 | if (isMultipart($session)) { |
| | 445 | $body = '--'.mimeBoundary() . $rn; |
| | 446 | |
| | 447 | if ($default_charset != "") { |
| | 448 | $body .= "Content-Type: text/plain; charset=$default_charset".$rn; |
| | 449 | } |
| | 450 | else { |
| | 451 | $body .= "Content-Type: text/plain" . $rn; |
| | 452 | } |
| | 453 | |
| | 454 | if (strtolower($default_charset) == 'iso-2022-jp') { |
| | 455 | if (mb_detect_encoding($passedBody) == 'ASCII') { |
| | 456 | $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn . |
| | 457 | $passedBody . $rn . $rn; |
| | 458 | } else { |
| | 459 | $body .= "Content-Transfer-Encoding: 7bit\r\n\r\n" . |
| | 460 | mb_convert_encoding($passedBody, 'JIS') . "\r\n\r\n"; |
| | 461 | } |
| | 462 | } else { |
| | 463 | $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn . |
| | 464 | $passedBody . $rn . $rn; |
| | 465 | } |
| | 466 | if ($fp) { |
| | 467 | fputs ($fp, $body); |
| | 468 | } |
| | 469 | |
| | 470 | $attachmentlength = attachFiles($fp, $session, $rn, $checkdot); |
| | 471 | |
| | 472 | if (!isset($postbody)) { |
| | 473 | $postbody = ""; |
| | 474 | } |
| | 475 | $postbody .= $rn . "--" . mimeBoundary() . "--" . $rn . $rn; |
| | 476 | if ($fp) fputs ($fp, $postbody); |
| | 477 | } else { |
| | 478 | if (strtolower($default_charset) == 'iso-2022-jp') { |
| | 479 | $body = mb_convert_encoding($passedBody, 'JIS') . $rn; |
| | 480 | } else { |
| | 481 | $body = $passedBody . $rn; |
| | 482 | } |
| | 483 | if ($fp) { |
| | 484 | fputs ($fp, $body); |
| | 485 | } |
| | 486 | $postbody = $rn; |
| | 487 | if ($fp) { |
| | 488 | fputs ($fp, $postbody); |
| | 489 | } |
| | 490 | } |
| | 491 | |
| | 492 | return (strlen($body) + strlen($postbody) + $attachmentlength); |
| | 493 | } |
| | 494 | |
| | 495 | /* Send mail using the sendmail command |
| | 496 | */ |
| | 497 | function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) { |
| | 498 | global $sendmail_path, $popuser, $username, $domain; |
| | 499 | |
| | 500 | /* Build envelope sender address. Make sure it doesn't contain |
| | 501 | * spaces or other "weird" chars that would allow a user to |
| | 502 | * exploit the shell/pipe it is used in. |
| | 503 | */ |
| | 504 | $envelopefrom = getFrom(); |
| | 505 | $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom); |
| | 506 | $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom); |
| | 507 | $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom); |
| | 508 | |
| | 509 | /** |
| | 510 | * open pipe to sendmail or qmail-inject |
| | 511 | * (qmail-inject doesn't accept -t param) |
| | 512 | */ |
| | 513 | if (strstr($sendmail_path, "qmail-inject")) { |
| | 514 | $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w"); |
| | 515 | } else { |
| | 516 | $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w"); |
| | 517 | } |
| | 518 | |
| | 519 | $headerlength = write822Header ($fp, $t, $c, $b, $subject, $body, |
| | 520 | $more_headers, $session, "\n"); |
| | 521 | $bodylength = writeBody($fp, $body, $session, "\n", true); |
| | 522 | |
| | 523 | pclose($fp); |
| | 524 | |
| | 525 | return ($headerlength + $bodylength); |
| | 526 | } |
| | 527 | |
| | 528 | function smtpReadData($smtpConnection) { |
| | 529 | $read = fgets($smtpConnection, 1024); |
| | 530 | $counter = 0; |
| | 531 | while ($read) { |
| | 532 | echo $read . '<BR>'; |
| | 533 | $data[$counter] = $read; |
| | 534 | $read = fgets($smtpConnection, 1024); |
| | 535 | $counter++; |
| | 536 | } |
| | 537 | } |
| | 538 | |
| | 539 | function sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session) { |
| | 540 | global $username, $popuser, $domain, $version, $smtpServerAddress, |
| | 541 | $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity, |
| | 542 | $key, $onetimepad; |
| | 543 | |
| | 544 | $to = expandRcptAddrs(parseAddrs($t)); |
| | 545 | $cc = expandRcptAddrs(parseAddrs($c)); |
| | 546 | $bcc = expandRcptAddrs(parseAddrs($b)); |
| | 547 | if (isset($identity) && $identity != 'default') { |
| | 548 | $from_addr = getPref($data_dir, $username, |
| | 549 | 'email_address' . $identity); |
| | 550 | } |
| | 551 | else { |
| | 552 | $from_addr = getPref($data_dir, $username, 'email_address'); |
| | 553 | } |
| | 554 | |
| | 555 | if (!$from_addr) { |
| | 556 | $from_addr = "$popuser@$domain"; |
| | 557 | } |
| | 558 | |
| | 559 | /* POP3 BEFORE SMTP CODE HERE */ |
| | 560 | global $pop_before_smtp; |
| | 561 | if (isset($pop_before_smtp) && $pop_before_smtp === true) { |
| | 562 | if (!isset($pop_port)) { |
| | 563 | $pop_port = 110; |
| | 564 | } |
| | 565 | if (!isset($pop_server)) { |
| | 566 | $pop_server = $smtpServerAddress; /* usually the same host! */ |
| | 567 | } |
| | 568 | $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str); |
| | 569 | if (!$popConnection) { |
| | 570 | error_log("Error connecting to POP Server ($pop_server:$pop_port)" |
| | 571 | . " $err_no : $err_str"); |
| | 572 | } else { |
| | 573 | $tmp = fgets($popConnection, 1024); /* banner */ |
| | 574 | if (!eregi("^\+OK", $tmp, $regs)) { |
| | 575 | return(0); |
| | 576 | } |
| | 577 | fputs($popConnection, "USER $username\r\n"); |
| | 578 | $tmp = fgets($popConnection, 1024); |
| | 579 | if (!eregi("^\+OK", $tmp, $regs)) { |
| | 580 | return(0); |
| | 581 | } |
| | 582 | fputs($popConnection, 'PASS ' . OneTimePadDecrypt($key, $onetimepad) . "\r\n"); |
| | 583 | $tmp = fgets($popConnection, 1024); |
| | 584 | if (!eregi("^\+OK", $tmp, $regs)) { |
| | 585 | return(0); |
| | 586 | } |
| | 587 | fputs($popConnection, "QUIT\r\n"); /* log off */ |
| | 588 | fclose($popConnection); |
| | 589 | } |
| | 590 | } |
| | 591 | |
| | 592 | $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, |
| | 593 | $errorNumber, $errorString); |
| | 594 | if (!$smtpConnection) { |
| | 595 | echo 'Error connecting to SMTP Server.<br>'; |
| | 596 | echo "$errorNumber : $errorString<br>"; |
| | 597 | exit; |
| | 598 | } |
| | 599 | $tmp = fgets($smtpConnection, 1024); |
| | 600 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 601 | return(0); |
| | 602 | } |
| | 603 | |
| | 604 | $to_list = getLineOfAddrs($to); |
| | 605 | $cc_list = getLineOfAddrs($cc); |
| | 606 | |
| | 607 | /* Lets introduce ourselves */ |
| | 608 | if (! isset ($use_authenticated_smtp) |
| | 609 | || $use_authenticated_smtp == false) { |
| | 610 | fputs($smtpConnection, "HELO $domain\r\n"); |
| | 611 | $tmp = fgets($smtpConnection, 1024); |
| | 612 | if (errorCheck($tmp, $smtpConnection)!=5) return(0); |
| | 613 | } else { |
| | 614 | fputs($smtpConnection, "EHLO $domain\r\n"); |
| | 615 | $tmp = fgets($smtpConnection, 1024); |
| | 616 | if (errorCheck($tmp, $smtpConnection)!=5) return(0); |
| | 617 | |
| | 618 | fputs($smtpConnection, "AUTH LOGIN\r\n"); |
| | 619 | $tmp = fgets($smtpConnection, 1024); |
| | 620 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 621 | return(0); |
| | 622 | } |
| | 623 | |
| | 624 | fputs($smtpConnection, base64_encode ($username) . "\r\n"); |
| | 625 | $tmp = fgets($smtpConnection, 1024); |
| | 626 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 627 | return(0); |
| | 628 | } |
| | 629 | |
| | 630 | fputs($smtpConnection, base64_encode |
| | 631 | (OneTimePadDecrypt($key, $onetimepad)) . "\r\n"); |
| | 632 | $tmp = fgets($smtpConnection, 1024); |
| | 633 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 634 | return(0); |
| | 635 | } |
| | 636 | } |
| | 637 | |
| | 638 | /* Ok, who is sending the message? */ |
| | 639 | fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n"); |
| | 640 | $tmp = fgets($smtpConnection, 1024); |
| | 641 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 642 | return(0); |
| | 643 | } |
| | 644 | |
| | 645 | /* send who the recipients are */ |
| | 646 | for ($i = 0; $i < count($to); $i++) { |
| | 647 | fputs($smtpConnection, "RCPT TO: $to[$i]\r\n"); |
| | 648 | $tmp = fgets($smtpConnection, 1024); |
| | 649 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 650 | return(0); |
| | 651 | } |
| | 652 | } |
| | 653 | for ($i = 0; $i < count($cc); $i++) { |
| | 654 | fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n"); |
| | 655 | $tmp = fgets($smtpConnection, 1024); |
| | 656 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 657 | return(0); |
| | 658 | } |
| | 659 | } |
| | 660 | for ($i = 0; $i < count($bcc); $i++) { |
| | 661 | fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n"); |
| | 662 | $tmp = fgets($smtpConnection, 1024); |
| | 663 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 664 | return(0); |
| | 665 | } |
| | 666 | } |
| | 667 | |
| | 668 | /* Lets start sending the actual message */ |
| | 669 | fputs($smtpConnection, "DATA\r\n"); |
| | 670 | $tmp = fgets($smtpConnection, 1024); |
| | 671 | if (errorCheck($tmp, $smtpConnection)!=5) { |
| | 672 | return(0); |
| | 673 | } |
| | 674 | |
| | 675 | /* Send the message */ |
| | 676 | $headerlength = write822Header ($smtpConnection, $t, $c, $b, |
| | 677 | $subject, $body, $more_headers, $session); |
| | 678 | $bodylength = writeBody($smtpConnection, $body, $session, "\r\n", true); |
| | 679 | |
| | 680 | fputs($smtpConnection, ".\r\n"); /* end the DATA part */ |
| | 681 | $tmp = fgets($smtpConnection, 1024); |
| | 682 | $num = errorCheck($tmp, $smtpConnection, true); |
| | 683 | if ($num != 250) { |
| | 684 | return(0); |
| | 685 | } |
| | 686 | |
| | 687 | fputs($smtpConnection, "QUIT\r\n"); /* log off */ |
| | 688 | |
| | 689 | fclose($smtpConnection); |
| | 690 | |
| | 691 | return ($headerlength + $bodylength); |
| | 692 | } |
| | 693 | |
| | 694 | |
| | 695 | function errorCheck($line, $smtpConnection, $verbose = false) { |
| | 696 | global $color, $compose_new_win; |
| | 697 | |
| | 698 | /* Read new lines on a multiline response */ |
| | 699 | $lines = $line; |
| | 700 | while(ereg("^[0-9]+-", $line)) { |
| | 701 | $line = fgets($smtpConnection, 1024); |
| | 702 | $lines .= $line; |
| | 703 | } |
| | 704 | |
| | 705 | /* Status: 0 = fatal |
| | 706 | * 5 = ok |
| | 707 | */ |
| | 708 | $err_num = substr($line, 0, strpos($line, " ")); |
| | 709 | switch ($err_num) { |
| | 710 | case 500: $message = 'Syntax error; command not recognized'; |
| | 711 | $status = 0; |
| | 712 | break; |
| | 713 | case 501: $message = 'Syntax error in parameters or arguments'; |
| | 714 | $status = 0; |
| | 715 | break; |
| | 716 | case 502: $message = 'Command not implemented'; |
| | 717 | $status = 0; |
| | 718 | break; |
| | 719 | case 503: $message = 'Bad sequence of commands'; |
| | 720 | $status = 0; |
| | 721 | break; |
| | 722 | case 504: $message = 'Command parameter not implemented'; |
| | 723 | $status = 0; |
| | 724 | break; |
| | 725 | |
| | 726 | case 211: $message = 'System status, or system help reply'; |
| | 727 | $status = 5; |
| | 728 | break; |
| | 729 | case 214: $message = 'Help message'; |
| | 730 | $status = 5; |
| | 731 | break; |
| | 732 | |
| | 733 | case 220: $message = 'Service ready'; |
| | 734 | $status = 5; |
| | 735 | break; |
| | 736 | case 221: $message = 'Service closing transmission channel'; |
| | 737 | $status = 5; |
| | 738 | break; |
| | 739 | |
| | 740 | case 421: $message = 'Service not available, closing chanel'; |
| | 741 | $status = 0; |
| | 742 | break; |
| | 743 | |
| | 744 | case 235: return(5); |
| | 745 | break; |
| | 746 | case 250: $message = 'Requested mail action okay, completed'; |
| | 747 | $status = 5; |
| | 748 | break; |
| | 749 | case 251: $message = 'User not local; will forward'; |
| | 750 | $status = 5; |
| | 751 | break; |
| | 752 | case 334: return(5); break; |
| | 753 | case 450: $message = 'Requested mail action not taken: mailbox unavailable'; |
| | 754 | $status = 0; |
| | 755 | break; |
| | 756 | case 550: $message = 'Requested action not taken: mailbox unavailable'; |
| | 757 | $status = 0; |
| | 758 | break; |
| | 759 | case 451: $message = 'Requested action aborted: error in processing'; |
| | 760 | $status = 0; |
| | 761 | break; |
| | 762 | case 551: $message = 'User not local; please try forwarding'; |
| | 763 | $status = 0; |
| | 764 | break; |
| | 765 | case 452: $message = 'Requested action not taken: insufficient system storage'; |
| | 766 | $status = 0; |
| | 767 | break; |
| | 768 | case 552: $message = 'Requested mail action aborted: exceeding storage allocation'; |
| | 769 | $status = 0; |
| | 770 | break; |
| | 771 | case 553: $message = 'Requested action not taken: mailbox name not allowed'; |
| | 772 | $status = 0; |
| | 773 | break; |
| | 774 | case 354: $message = 'Start mail input; end with .'; |
| | 775 | $status = 5; |
| | 776 | break; |
| | 777 | case 554: $message = 'Transaction failed'; |
| | 778 | $status = 0; |
| | 779 | break; |
| | 780 | default: $message = 'Unknown response: '. nl2br(htmlspecialchars($lines)); |
| | 781 | $status = 0; |
| | 782 | $error_num = '001'; |
| | 783 | break; |
| | 784 | } |
| | 785 | |
| | 786 | if ($status == 0) { |
| | 787 | include_once('../functions/page_header.php'); |
| | 788 | if ($compose_new_win == '1') { |
| | 789 | compose_Header($color, 'None'); |
| | 790 | } |
| | 791 | else { |
| | 792 | displayPageHeader($color, 'None'); |
| | 793 | } |
| | 794 | include_once('../functions/display_messages.php'); |
| | 795 | $lines = nl2br(htmlspecialchars($lines)); |
| | 796 | $msg = $message . "<br>\nServer replied: $lines"; |
| | 797 | plain_error_message($msg, $color); |
| | 798 | } |
| | 799 | if (! $verbose) return $status; |
| | 800 | return $err_num; |
| | 801 | } |
| | 802 | |
| | 803 | /* create new reference header per rfc2822 */ |
| | 804 | |
| | 805 | function calculate_references($refs, $inreplyto, $old_reply_to) { |
| | 806 | |
| | 807 | $refer = ""; |
| | 808 | for ($i=1;$i<count($refs[0]);$i++) { |
| | 809 | if (!empty($refs[0][$i])) { |
| | 810 | if (preg_match("/^References:(.+)$/UA", $refs[0][$i], $regs)) { |
| | 811 | $refer = trim($regs[1]); |
| | 812 | } |
| | 813 | else { |
| | 814 | $refer .= ' ' . trim($refs[0][$i]); |
| | 815 | } |
| | 816 | |
| | 817 | } |
| | 818 | } |
| | 819 | $refer_a = explode(' ', $refer); |
| | 820 | $refer = ''; |
| | 821 | foreach ($refer_a as $ref) { |
| | 822 | $ref = trim($ref); |
| | 823 | if ($ref{0} == '<' && $ref{(strlen($ref)-1)} == '>') { |
| | 824 | $refer .= $ref . ' '; |
| | 825 | } |
| | 826 | } |
| | 827 | $refer = trim($refer); |
| | 828 | if (strlen($refer) > 2) { |
| | 829 | $refer .= ' ' . $inreplyto; |
| | 830 | } |
| | 831 | else { |
| | 832 | if (!empty($old_reply_to)) { |
| | 833 | $refer .= $old_reply_to . ' ' . $inreplyto; |
| | 834 | } |
| | 835 | else { |
| | 836 | $refer .= $inreplyto; |
| | 837 | } |
| | 838 | } |
| | 839 | trim($refer); |
| | 840 | return $refer; |
| | 841 | } |
| | 842 | |
| | 843 | function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN, |
| | 844 | $prio = 3, $session) { |
| | 845 | global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad, |
| | 846 | $data_dir, $username, $domain, $key, $version, $sent_folder, |
| | 847 | $imapServerAddress, $imapPort, $default_use_priority, $more_headers, |
| | 848 | $request_mdn, $request_dr, $uid_support; |
| | 849 | |
| | 850 | $more_headers = Array(); |
| | 851 | |
| | 852 | do_hook('smtp_send'); |
| | 853 | |
| | 854 | $imap_stream = sqimap_login($username, $key, $imapServerAddress, |
| | 855 | $imapPort, 1); |
| | 856 | |
| | 857 | if (isset($reply_id) && $reply_id) { |
| | 858 | sqimap_mailbox_select ($imap_stream, $mailbox); |
| | 859 | sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered', false); |
| | 860 | |
| | 861 | /* Insert In-Reply-To and References headers if the |
| | 862 | * message-id of the message we reply to is set (longer than "<>") |
| | 863 | * The References header should really be the old Referenced header |
| | 864 | * with the message ID appended, and now it is (jmunro) |
| | 865 | */ |
| | 866 | $sid = sqimap_session_id($uid_support); |
| | 867 | $query = "$sid FETCH $reply_id (BODY.PEEK[HEADER.FIELDS (Message-Id In-Reply-To)])\r\n"; |
| | 868 | fputs ($imap_stream, $query); |
| | 869 | $read = sqimap_read_data($imap_stream, $sid, true, $response, $message); |
| | 870 | $message_id = ''; |
| | 871 | $in_reply_to = ''; |
| | 872 | |
| | 873 | foreach ($read as $r) { |
| | 874 | if (preg_match("/^message-id:(.*)/iA", $r, $regs)) { |
| | 875 | $message_id = trim($regs[1]); |
| | 876 | } |
| | 877 | if (preg_match("/^in-reply-to:(.*)/iA", $r, $regs)) { |
| | 878 | $in_reply_to = trim($regs[1]); |
| | 879 | } |
| | 880 | } |
| | 881 | |
| | 882 | if(strlen($message_id) > 2) { |
| | 883 | $refs = get_reference_header ($imap_stream, $reply_id); |
| | 884 | $inreplyto = $message_id; |
| | 885 | $old_reply_to = $in_reply_to; |
| | 886 | $refer = calculate_references ($refs, $inreplyto, $old_reply_to); |
| | 887 | $more_headers['In-Reply-To'] = $inreplyto; |
| | 888 | $more_headers['References'] = $refer; |
| | 889 | } |
| | 890 | |
| | 891 | } |
| | 892 | if ($default_use_priority) { |
| | 893 | $more_headers = array_merge($more_headers, createPriorityHeaders($prio)); |
| | 894 | } |
| | 895 | |
| | 896 | $requestRecipt = 0; |
| | 897 | if (isset($request_dr)) { |
| | 898 | $requestRecipt += 1; |
| | 899 | } |
| | 900 | if (isset($request_mdn)) { |
| | 901 | $requestRecipt += 2; |
| | 902 | } |
| | 903 | if ( $requestRecipt > 0) { |
| | 904 | $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt)); |
| | 905 | } |
| | 906 | |
| | 907 | /* this is to catch all plain \n instances and |
| | 908 | * replace them with \r\n. All newlines were converted |
| | 909 | * into just \n inside the compose.php file. |
| | 910 | * But only if delimiter is, in fact, \r\n. |
| | 911 | */ |
| | 912 | |
| | 913 | if ($MDN) { |
| | 914 | $more_headers["Content-Type"] = "multipart/report; ". |
| | 915 | "report-type=disposition-notification;"; |
| | 916 | } |
| | 917 | |
| | 918 | if ($useSendmail) { |
| | 919 | /* In order to remove the problem of users not able to create |
| | 920 | * messages with "." on a blank line, RFC821 has made provision |
| | 921 | * in section 4.5.2 (Transparency). |
| | 922 | */ |
| | 923 | $body_sendmail = $body; |
| | 924 | if (($body_sendmail{0} == '.')) { |
| | 925 | $body_sendmail = '.' . $body_sendmail; |
| | 926 | } |
| | 927 | $body_sendmail = str_replace("\n.","\n..",$body_sendmail); |
| | 928 | |
| | 929 | $length = sendSendmail($t, $c, $b, $subject, $body_sendmail, $more_headers, |
| | 930 | $session); |
| | 931 | $body = ereg_replace("\n", "\r\n", $body); |
| | 932 | } else { |
| | 933 | $body = ereg_replace("\n", "\r\n", $body); |
| | 934 | /* In order to remove the problem of users not able to create |
| | 935 | * messages with "." on a blank line, RFC821 has made provision |
| | 936 | * in section 4.5.2 (Transparency). |
| | 937 | */ |
| | 938 | $body_smtp = $body; |
| | 939 | if (($body_smtp{0} == '.')) { |
| | 940 | $body_smtp = '.' . $body_smtp; |
| | 941 | } |
| | 942 | $body_smtp = str_replace("\n.","\n..",$body_smtp); |
| | 943 | |
| | 944 | |
| | 945 | $length = sendSMTP($t, $c, $b, $subject, $body_smtp, $more_headers, |
| | 946 | $session); |
| | 947 | } |
| | 948 | if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) { |
| | 949 | $headerlength = write822Header (false, $t, $c, $b, $subject, $more_headers, $session, "\r\n"); |
| | 950 | $bodylength = writeBody(false, $body, $session, "\r\n"); |
| | 951 | $length = $headerlength + $bodylength; |
| | 952 | |
| | 953 | sqimap_append ($imap_stream, $sent_folder, $length); |
| | 954 | write822Header ($imap_stream, $t, $c, $b, $subject, $body, $more_headers, |
| | 955 | $session); |
| | 956 | writeBody ($imap_stream, $body, $session); |
| | 957 | sqimap_append_done ($imap_stream); |
| | 958 | } |
| | 959 | sqimap_logout($imap_stream); |
| | 960 | /* Delete the files uploaded for attaching (if any). |
| | 961 | * only if $length != 0 (if there was no error) |
| | 962 | */ |
| | 963 | if ($length) { |
| | 964 | ClearAttachments($session); |
| | 965 | } |
| | 966 | |
| | 967 | return $length; |
| | 968 | } |
| | 969 | |
| | 970 | function createPriorityHeaders($prio) { |
| | 971 | $prio_headers = Array(); |
| | 972 | $prio_headers['X-Priority'] = $prio; |
| | 973 | |
| | 974 | switch($prio) { |
| | 975 | case 1: $prio_headers['Importance'] = 'High'; |
| | 976 | $prio_headers['X-MSMail-Priority'] = 'High'; |
| | 977 | break; |
| | 978 | |
| | 979 | case 3: $prio_headers['Importance'] = 'Normal'; |
| | 980 | $prio_headers['X-MSMail-Priority'] = 'Normal'; |
| | 981 | break; |
| | 982 | |
| | 983 | case 5: |
| | 984 | $prio_headers['Importance'] = 'Low'; |
| | 985 | $prio_headers['X-MSMail-Priority'] = 'Low'; |
| | 986 | break; |
| | 987 | } |
| | 988 | return $prio_headers; |
| | 989 | } |
| | 990 | |
| | 991 | function createReceiptHeaders($receipt) { |
| | 992 | |
| | 993 | GLOBAL $data_dir, $username, $identity, $popuser, $domain; |
| | 994 | |
| | 995 | $receipt_headers = Array(); |
| | 996 | if (isset($identity) && $identity != 'default') { |
| | 997 | $from = getPref($data_dir, $username, 'full_name' . $identity); |
| | 998 | $from_addr = getPref($data_dir, $username, 'email_address' . $identity); |
| | 999 | } else { |
| | 1000 | $from = getPref($data_dir, $username, 'full_name'); |
| | 1001 | $from_addr = getPref($data_dir, $username, 'email_address'); |
| | 1002 | } |
| | 1003 | if ($from_addr == '') { |
| | 1004 | $from_addr = $popuser.'@'.$domain; |
| | 1005 | } |
| | 1006 | |
| | 1007 | if ($from == '') { |
| | 1008 | $from = "<$from_addr>"; |
| | 1009 | } |
| | 1010 | else { |
| | 1011 | $from = '"' . encodeHeader($from) . "\" <$from_addr>"; |
| | 1012 | } |
| | 1013 | |
| | 1014 | /* On Delivery */ |
| | 1015 | if ( $receipt == 1 |
| | 1016 | || $receipt == 3 ) { |
| | 1017 | $receipt_headers["Return-Receipt-To"] = $from; |
| | 1018 | } |
| | 1019 | /* On Read */ |
| | 1020 | if ($receipt == 2 |
| | 1021 | || $receipt == 3 ) { |
| | 1022 | /* Pegasus Mail */ |
| | 1023 | $receipt_headers["X-Confirm-Reading-To"] = $from; |
| | 1024 | /* RFC 2298 */ |
| | 1025 | $receipt_headers["Disposition-Notification-To"] = $from; |
| | 1026 | } |
| | 1027 | return $receipt_headers; |
| | 1028 | } |
| | 1029 | |
| | 1030 | /* Figure out what the 'From:' address is |
| | 1031 | */ |
| | 1032 | |
| | 1033 | function getFrom() { |
| | 1034 | global $username, $popuser, $domain, $data_dir, $identity; |
| | 1035 | if (isset($identity) && $identity != 'default') { |
| | 1036 | $from_addr = getPref($data_dir, $username, |
| | 1037 | 'email_address' . $identity); |
| | 1038 | } |
| | 1039 | else { |
| | 1040 | $from_addr = getPref($data_dir, $username, 'email_address'); |
| | 1041 | } |
| | 1042 | |
| | 1043 | if (!$from_addr) { |
| | 1044 | $from_addr = "$popuser@$domain"; |
| | 1045 | } |
| | 1046 | return $from_addr; |
| | 1047 | } |
| | 1048 | |
| | 1049 | |
| | 1050 | ?> |
projects / squirrelmail.git / blame_incremental