functions/imap_general.php

   1 <?php
   2
   3 /**
   4  * imap_general.php
   5  *
   6  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This implements all functions that do general imap functions.
  10  *
  11  * $Id$
  12  */
  13
  14 require_once(SM_PATH . 'functions/page_header.php');
  15 require_once(SM_PATH . 'functions/auth.php');
  16
  17
  18 global $sqimap_session_id;
  19 $sqimap_session_id = 1;
  20
  21 /* Sets an unique session id in order to avoid simultanous sessions crash. */
  22 function sqimap_session_id($unique_id = false) {
  23     global $data_dir, $username, $sqimap_session_id;
  24     if (!$unique_id) {
  25         return( sprintf("A%03d", $sqimap_session_id++) );
  26     } else {
  27         return( sprintf("A%03d", $sqimap_session_id++) . ' UID' );
  28     }
  29 }
  30
  31 /*
  32  * Both send a command and accept the result from the command.
  33  * This is to allow proper session number handling.
  34  */
  35 function sqimap_run_command_list ($imap_stream, $query, $handle_errors, &$response, &$message, $unique_id = false) {
  36     if ($imap_stream) {
  37         $sid = sqimap_session_id($unique_id);
  38         fputs ($imap_stream, $sid . ' ' . $query . "\r\n");
  39         $read = sqimap_read_data_list ($imap_stream, $sid, $handle_errors, $response, $message, $query );
  40         return $read;
  41     } else {
  42         global $squirrelmail_language, $color;
  43         set_up_language($squirrelmail_language);
  44         require_once(SM_PATH . 'functions/display_messages.php');
  45         $string = "<b><font color=$color[2]>\n" .
  46                 _("ERROR : No available imapstream.") .
  47                 "</b></font>\n";
  48         error_box($string,$color);
  49         return false;
  50     }
  51
  52 }
  53
  54 function sqimap_run_command ($imap_stream, $query, $handle_errors, &$response, &$message, $unique_id = false) {
  55     if ($imap_stream) {
  56         $sid = sqimap_session_id($unique_id);
  57         fputs ($imap_stream, $sid . ' ' . $query . "\r\n");
  58         $read = sqimap_read_data ($imap_stream, $sid, $handle_errors, $response, $message, $query);
  59         return $read;
  60     } else {
  61         global $squirrelmail_language, $color;
  62         set_up_language($squirrelmail_language);
  63         require_once(SM_PATH . 'functions/display_messages.php');
  64         $string = "<b><font color=$color[2]>\n" .
  65                 _("ERROR : No available imapstream.") .
  66                 "</b></font>\n";
  67         error_box($string,$color);
  68         return false;
  69     }
  70
  71 }
  72
  73
  74 /*
  75  * custom fgets function. gets a line from IMAP
  76  * no matter how big it may be
  77  */
  78
  79 function sqimap_fgets($imap_stream) {
  80     $read = '';
  81     $buffer = 4096;
  82     $results = '';
  83     $offset = 0;
  84     while (strpos($results, "\r\n", $offset) === false) {
  85         if (!($read = fgets($imap_stream, $buffer))) {
  86             break;
  87         }
  88         if ( $results != '' ) {
  89             $offset = strlen($results) - 1;
  90         }
  91         $results .= $read;
  92     }
  93     return $results;
  94 }
  95
  96 /*
  97  * Reads the output from the IMAP stream.  If handle_errors is set to true,
  98  * this will also handle all errors that are received.  If it is not set,
  99  * the errors will be sent back through $response and $message
 100  */
 101
 102 function sqimap_read_data_list ($imap_stream, $pre, $handle_errors, &$response, &$message, $query = '') {
 103     global $color, $squirrelmail_language;
 104     $read = '';
 105     $pre_a = explode(' ',trim($pre));
 106     $pre = $pre_a[0];
 107     $resultlist = array();
 108     $data = array();
 109     $read = sqimap_fgets($imap_stream);
 110     while (1) {
 111         switch (true) {
 112             case preg_match("/^$pre (OK|BAD|NO)(.*)$/", $read, $regs):
 113             case preg_match('/^\* (BYE \[ALERT\])(.*)$/', $read, $regs):
 114                 $response = $regs[1];
 115                 $message = trim($regs[2]);
 116                 break 2;
 117             case preg_match("/^\* (OK \[PARSE\])(.*)$/", $read):
 118                 $read = sqimap_fgets($imap_stream);
 119                 break 1;
 120             case preg_match('/^\* ([0-9]+) FETCH.*/', $read, $regs):
 121                 $fetch_data = array();
 122                 $fetch_data[] = $read;
 123                 $read = sqimap_fgets($imap_stream);
 124                 while (!preg_match('/^\* [0-9]+ FETCH.*/', $read) &&
 125                        !preg_match("/^$pre (OK|BAD|NO)(.*)$/", $read)) {
 126                     $fetch_data[] = $read;
 127                     $last = $read;
 128                     $read = sqimap_fgets($imap_stream);
 129                 }
 130                 if (isset($last) && preg_match('/^\)/', $last)) {
 131                     array_pop($fetch_data);
 132                 }
 133                 $resultlist[] = $fetch_data;
 134                 break 1;
 135             default:
 136                 $data[] = $read;
 137                 $read = sqimap_fgets($imap_stream);
 138                 break 1;
 139         }
 140     }
 141     if (!empty($data)) {
 142         $resultlist[] = $data;
 143     }
 144     elseif (empty($resultlist)) {
 145         $resultlist[] = array();
 146     }
 147     if ($handle_errors == false) {
 148         return( $resultlist );
 149     }
 150     elseif ($response == 'NO') {
 151     /* ignore this error from M$ exchange, it is not fatal (aka bug) */
 152         if (strstr($message, 'command resulted in') === false) {
 153             set_up_language($squirrelmail_language);
 154             require_once(SM_PATH . 'functions/display_messages.php');
 155             $string = "<b><font color=$color[2]>\n" .
 156                 _("ERROR : Could not complete request.") .
 157                 "</b><br>\n" .
 158                 _("Query:") . ' ' .
 159                 htmlspecialchars($query) . '<br>' .
 160                 _("Reason Given: ") .
 161                 htmlspecialchars($message) . "</font><br>\n";
 162             error_box($string,$color);
 163             exit;
 164         }
 165     }
 166     elseif ($response == 'BAD') {
 167         set_up_language($squirrelmail_language);
 168         require_once(SM_PATH . 'functions/display_messages.php');
 169         $string = "<b><font color=$color[2]>\n" .
 170             _("ERROR : Bad or malformed request.") .
 171             "</b><br>\n" .
 172             _("Query:") . ' '.
 173             htmlspecialchars($query) . '<br>' .
 174             _("Server responded: ") .
 175             htmlspecialchars($message) . "</font><br>\n";
 176         error_box($string,$color);
 177         exit;
 178     }
 179     else {
 180         return $resultlist;
 181     }
 182 }
 183
 184 function sqimap_read_data ($imap_stream, $pre, $handle_errors, &$response, &$message, $query = '') {
 185     $res = sqimap_read_data_list($imap_stream, $pre, $handle_errors, $response, $message, $query);
 186
 187     /* sqimap_read_data should be called for one response
 188        but since it just calls sqimap_read_data_list which
 189        handles multiple responses we need to check for that
 190        and merge the $res array IF they are seperated and
 191        IF it was a FETCH response. */
 192
 193     if (isset($res[1]) && is_array($res[1]) && isset($res[1][0])
 194         && preg_match('/^\* \d+ FETCH/', $res[1][0])) {
 195         $result = array();
 196         foreach($res as $index=>$value) {
 197             $result = array_merge($result, $res["$index"]);
 198         }
 199     }
 200     if (isset($result)) {
 201         return $result;
 202     }
 203     else {
 204         return $res[0];
 205     }
 206
 207 }
 208
 209 /*
 210  * Logs the user into the imap server.  If $hide is set, no error messages
 211  * will be displayed.  This function returns the imap connection handle.
 212  */
 213 function sqimap_login ($username, $password, $imap_server_address, $imap_port, $hide) {
 214     global $color, $squirrelmail_language, $onetimepad, $use_imap_tls, $imap_auth_mech;
 215
 216     if (!isset($onetimepad) || empty($onetimepad)) {
 217         sqgetglobalvar('onetimepad' , $onetimepad , SQ_SESSION );
 218     }
 219     $imap_server_address = sqimap_get_user_server($imap_server_address, $username);
 220         $host=$imap_server_address;
 221
 222         if (($use_imap_tls == true) and (check_php_version(4,3)) and (extension_loaded('openssl'))) {
 223           /* Use TLS by prefixing "tls://" to the hostname */
 224           $imap_server_address = 'tls://' . $imap_server_address;
 225         }
 226
 227     $imap_stream = fsockopen ( $imap_server_address, $imap_port, $error_number, $error_string, 15);
 228
 229     /* Do some error correction */
 230     if (!$imap_stream) {
 231         if (!$hide) {
 232             set_up_language($squirrelmail_language, true);
 233             require_once(SM_PATH . 'functions/display_messages.php');
 234             $string = sprintf (_("Error connecting to IMAP server: %s.") .
 235                               "<br>\r\n", $imap_server_address) .
 236                       "$error_number : $error_string<br>\r\n";
 237             logout_error($string,$color);
 238         }
 239         exit;
 240     }
 241
 242     $server_info = fgets ($imap_stream, 1024);
 243
 244     /* Decrypt the password */
 245     $password = OneTimePadDecrypt($password, $onetimepad);
 246
 247         if (($imap_auth_mech == 'cram-md5') OR ($imap_auth_mech == 'digest-md5')) {
 248       // We're using some sort of authentication OTHER than plain or login
 249           $tag=sqimap_session_id(false);
 250           if ($imap_auth_mech == 'digest-md5') {
 251             $query = $tag . " AUTHENTICATE DIGEST-MD5\r\n";
 252           } elseif ($imap_auth_mech == 'cram-md5') {
 253             $query = $tag . " AUTHENTICATE CRAM-MD5\r\n";
 254           }
 255           fputs($imap_stream,$query);
 256           $answer=sqimap_fgets($imap_stream);
 257           // Trim the "+ " off the front
 258           $response=explode(" ",$answer,3);
 259           if ($response[0] == '+') {
 260             // Got a challenge back
 261                 $challenge=$response[1];
 262                 if ($imap_auth_mech == 'digest-md5') {
 263                   $reply = digest_md5_response($username,$password,$challenge,'imap',$host);
 264                 } elseif ($imap_auth_mech == 'cram-md5') {
 265                   $reply = cram_md5_response($username,$password,$challenge);
 266                 }
 267                 fputs($imap_stream,$reply);
 268                 $read=sqimap_fgets($imap_stream);
 269                 if ($imap_auth_mech == 'digest-md5') {
 270                   // DIGEST-MD5 has an extra step..
 271                   if (substr($read,0,1) == '+') { // OK so far..
 272                     fputs($imap_stream,"\r\n");
 273                     $read=sqimap_fgets($imap_stream);
 274                   }
 275                 }
 276                 $results=explode(" ",$read,3);
 277                 $response=$results[1];
 278                 $message=$results[2];
 279       } else {
 280                 // Fake the response, so the error trap at the bottom will work
 281                 $response="BAD";
 282                 $message='IMAP server does not appear to support the authentication method selected.';
 283                 $message .= '  Please contact your system administrator.';
 284       }
 285     } elseif ($imap_auth_mech == 'login') {
 286           // Original IMAP login code
 287       $query = 'LOGIN "' . quoteimap($username) .  '" "' . quoteimap($password) . '"';
 288       $read = sqimap_run_command ($imap_stream, $query, false, $response, $message);
 289     } elseif ($imap_auth_mech == 'plain') {
 290                 /* Replace this with SASL PLAIN if it ever gets implemented */
 291                 $response="BAD";
 292                 $message='SquirrelMail does not support SASL PLAIN yet. Rerun conf.pl and use login instead.';
 293         } else {
 294                 $response="BAD";
 295                 $message="Internal SquirrelMail error - unknown IMAP authentication method chosen.  Please contact the developers.";
 296         }
 297
 298         /* If the connection was not successful, lets see why */
 299     if ($response != 'OK') {
 300         if (!$hide) {
 301             if ($response != 'NO') {
 302                 /* "BAD" and anything else gets reported here. */
 303                 $message = htmlspecialchars($message);
 304                 set_up_language($squirrelmail_language, true);
 305                 require_once(SM_PATH . 'functions/display_messages.php');
 306                 if ($response == 'BAD') {
 307                    $string = sprintf (_("Bad request: %s")."<br>\r\n", $message);
 308                 } else {
 309                    $string = sprintf (_("Unknown error: %s") . "<br>\n", $message);
 310                 }
 311                 if (isset($read) && is_array($read)) {
 312                         $string .= '<br>' . _("Read data:") . "<br>\n";
 313                     foreach ($read as $line) {
 314                         $string .= htmlspecialchars($line) . "<br>\n";
 315                     }
 316                 }
 317                 error_box($string,$color);
 318                 exit;
 319             } else {
 320                 /*
 321                  * If the user does not log in with the correct
 322                  * username and password it is not possible to get the
 323                  * correct locale from the user's preferences.
 324                  * Therefore, apply the same hack as on the login
 325                  * screen.
 326                  *
 327                  * $squirrelmail_language is set by a cookie when
 328                  * the user selects language and logs out
 329                  */
 330
 331                 set_up_language($squirrelmail_language, true);
 332                 include_once(SM_PATH . 'functions/display_messages.php' );
 333                 sqsession_destroy();
 334                 logout_error( _("Unknown user or password incorrect.") );
 335                 exit;
 336             }
 337         } else {
 338             exit;
 339         }
 340     }
 341     return $imap_stream;
 342 }
 343
 344 /* Simply logs out the IMAP session */
 345 function sqimap_logout ($imap_stream) {
 346     /* Logout is not valid until the server returns 'BYE'
 347      * If we don't have an imap_ stream we're already logged out */
 348     if(isset($imap_stream) && $imap_stream)
 349         sqimap_run_command($imap_stream, 'LOGOUT', false, $response, $message);
 350 }
 351
 352 function sqimap_capability($imap_stream, $capability='') {
 353     global $sqimap_capabilities;
 354     if (!is_array($sqimap_capabilities)) {
 355         $read = sqimap_run_command($imap_stream, 'CAPABILITY', true, $a, $b);
 356
 357         $c = explode(' ', $read[0]);
 358         for ($i=2; $i < count($c); $i++) {
 359             $cap_list = explode('=', $c[$i]);
 360             if (isset($cap_list[1])) {
 361                 $sqimap_capabilities[$cap_list[0]] = $cap_list[1];
 362             } else {
 363                 $sqimap_capabilities[$cap_list[0]] = TRUE;
 364             }
 365         }
 366     }
 367     if ($capability) {
 368         if (isset($sqimap_capabilities[$capability])) {
 369                 return $sqimap_capabilities[$capability];
 370         } else {
 371                 return false;
 372         }
 373     }
 374     return $sqimap_capabilities;
 375 }
 376
 377 /* Returns the delimeter between mailboxes: INBOX/Test, or INBOX.Test */
 378 function sqimap_get_delimiter ($imap_stream = false) {
 379     global $sqimap_delimiter, $optional_delimiter;
 380
 381     /* Use configured delimiter if set */
 382     if((!empty($optional_delimiter)) && $optional_delimiter != 'detect') {
 383         return $optional_delimiter;
 384     }
 385
 386     /* Do some caching here */
 387     if (!$sqimap_delimiter) {
 388         if (sqimap_capability($imap_stream, 'NAMESPACE')) {
 389             /*
 390              * According to something that I can't find, this is supposed to work on all systems
 391              * OS: This won't work in Courier IMAP.
 392              * OS: According to rfc2342 response from NAMESPACE command is:
 393              * OS: * NAMESPACE (PERSONAL NAMESPACES) (OTHER_USERS NAMESPACE) (SHARED NAMESPACES)
 394              * OS: We want to lookup all personal NAMESPACES...
 395              */
 396             $read = sqimap_run_command($imap_stream, 'NAMESPACE', true, $a, $b);
 397             if (eregi('\\* NAMESPACE +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL)', $read[0], $data)) {
 398                 if (eregi('^\\( *\\((.*)\\) *\\)', $data[1], $data2)) {
 399                     $pn = $data2[1];
 400                 }
 401                 $pna = explode(')(', $pn);
 402                 while (list($k, $v) = each($pna)) {
 403                     $lst = explode('"', $v);
 404                     if (isset($lst[3])) {
 405                         $pn[$lst[1]] = $lst[3];
 406                     } else {
 407                         $pn[$lst[1]] = '';
 408                     }
 409                 }
 410             }
 411             $sqimap_delimiter = $pn[0];
 412         } else {
 413             fputs ($imap_stream, ". LIST \"INBOX\" \"\"\r\n");
 414             $read = sqimap_read_data($imap_stream, '.', true, $a, $b);
 415             $quote_position = strpos ($read[0], '"');
 416             $sqimap_delimiter = substr ($read[0], $quote_position+1, 1);
 417         }
 418     }
 419     return $sqimap_delimiter;
 420 }
 421
 422
 423 /* Gets the number of messages in the current mailbox. */
 424 function sqimap_get_num_messages ($imap_stream, $mailbox) {
 425     $read_ary = sqimap_run_command ($imap_stream, "EXAMINE \"$mailbox\"", false, $result, $message);
 426     for ($i = 0; $i < count($read_ary); $i++) {
 427         if (ereg("[^ ]+ +([^ ]+) +EXISTS", $read_ary[$i], $regs)) {
 428             return $regs[1];
 429         }
 430     }
 431     return false; //"BUG! Couldn't get number of messages in $mailbox!";
 432 }
 433
 434
 435 function parseAddress($address, $max=0, $addr_ar = array(), $group = '', $host='') {
 436     $pos = 0;
 437     $j = strlen($address);
 438     $personal = '';
 439     $addr = '';
 440     $comment = '';
 441     if ($max && $max = count($addr_ar)) {
 442         return $addr_ar;
 443     }
 444     while ($pos < $j) {
 445         if ($max && $max = count($addr_ar)) {
 446             return $addr_ar;
 447         }
 448         $char = $address{$pos};
 449         switch ($char) {
 450             case '=':
 451                 if (preg_match('/^(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(.*)/Ui',substr($address,$pos),$reg)) {
 452                     if (!$personal) {
 453                         $personal = substr($address,0,$pos);
 454                     }
 455                     $personal .= $reg[1];
 456                     $pos += strlen($personal);
 457                 }
 458                 ++$pos;
 459                 break;
 460             case '"': /* get the personal name */
 461                 ++$pos;
 462                 if ($address{$pos} == '"') {
 463                     ++$pos;
 464                 } else {
 465                     $personal_start = $personal_end = $pos;
 466                     while ($pos < $j) {
 467                         $personal_end = strpos($address,'"',$pos);
 468                         if (($personal_end-2)>0 && (substr($address,$personal_end-2,2) === '\\"' ||
 469                             substr($address,$personal_end-2,2) === '\\\\')) {
 470                             $pos = $personal_end+1;
 471                         } else {
 472                             $personal = substr($address,$personal_start,$personal_end-$personal_start);
 473                             break;
 474                         }
 475                     }
 476                     if ($personal_end) { /* prohibit endless loops due to very wrong addresses */
 477                          $pos = $personal_end+1;
 478                     } else {
 479                          $pos = $j;
 480                     }
 481                 }
 482                 break;
 483             case '<':  /* get email address */
 484                 $addr_start = $pos;
 485                 $addr_end = strpos($address,'>',$addr_start);
 486                 $addr = substr($address,$addr_start+1,$addr_end-$addr_start-1);
 487                 $pos = $addr_end+1;
 488                 break;
 489             case '(':  /* rip off comments */
 490                 $addr_start = $pos;
 491                 $pos = strpos($address,')');
 492                 if ($pos !== false) {
 493                     $comment = substr($address, $addr_start+1,($pos-$addr_start-1));
 494                     $address_start = substr($address, 0, $addr_start);
 495                     $address_end   = substr($address, $pos + 1);
 496                     $address       = $address_start . $address_end;
 497                 }
 498                 $j = strlen($address);
 499                 $pos = $addr_start + 1;
 500                 break;
 501             case ',':  /* we reached a delimiter */
 502                 if ($addr == '') {
 503                     $addr = substr($address, 0, $pos);
 504                 } else if ($personal == '') {
 505                     $personal = trim(substr($address, 0, $addr_start));
 506                 }
 507                 if (!$personal && $comment) $personal = $comment;
 508                 if ($personal) $personal = decodeHeader($personal);
 509                 $addr_ar[] = array($addr,$personal);
 510                 $address = trim(substr($address, $pos+1));
 511                 $j = strlen($address);
 512                 $pos = 0;
 513                 $personal = '';
 514                 $addr = '';
 515                 break;
 516             case ':':  /* process the group addresses */
 517                 /* group marker */
 518                 $group = substr($address, 0, $pos);
 519                 $address = substr($address, $pos+1);
 520                 $result = parseAddress($address, $max, $addr_ar, $group);
 521                 $addr_ar = array( $result[0] );
 522                 $pos = $result[1];
 523                 $address = substr($address, $pos++);
 524                 $j = strlen($address);
 525                 $group = '';
 526                 break;
 527             case ';':
 528                 if ($group) {
 529                     $address = substr($address, 0, $pos - 1);
 530                 }
 531                 ++$pos;
 532                 break;
 533             default:
 534                 ++$pos;
 535                 break;
 536         }
 537     }
 538     if ($addr == '') {
 539         $addr = substr($address, 0, $pos);
 540     } else if ($personal == '') {
 541         $personal = trim(substr($address, 0, $addr_start));
 542     }
 543     if (!$personal && $comment) $personal = $comment;
 544     $email = $addr;
 545     if ($group && $addr == '') { /* no addresses found in group */
 546         $personal = $group;
 547         $addr_ar[] = array('',$personal);
 548         return (array($addr_ar,$pos+1 ));
 549     } elseif ($group) {
 550         $addr_ar[] = array($addr,$personal);
 551         return (array($addr_ar,$pos+1 ));
 552     } else {
 553         if ($personal || $addr) {
 554             $addr_ar[] = array($addr, $personal);
 555         }
 556     }
 557     return ($addr_ar);
 558 }
 559
 560 /*
 561  * Returns the number of unseen messages in this folder
 562  */
 563 function sqimap_unseen_messages ($imap_stream, $mailbox) {
 564     $read_ary = sqimap_run_command ($imap_stream, "STATUS \"$mailbox\" (UNSEEN)", false, $result, $message);
 565     $i = 0;
 566     $regs = array(false, false);
 567     while (isset($read_ary[$i])) {
 568         if (ereg("UNSEEN ([0-9]+)", $read_ary[$i], $regs)) {
 569             break;
 570         }
 571         $i++;
 572     }
 573     return $regs[1];
 574 }
 575
 576 /*
 577  * Returns the number of unseen/total messages in this folder
 578  */
 579 function sqimap_status_messages ($imap_stream, $mailbox) {
 580     $read_ary = sqimap_run_command ($imap_stream, "STATUS \"$mailbox\" (MESSAGES UNSEEN RECENT)", false, $result, $message);
 581     $i = 0;
 582     $messages = $unseen = $recent = false;
 583     $regs = array(false,false);
 584     while (isset($read_ary[$i])) {
 585         if (preg_match('/UNSEEN\s+([0-9]+)/i', $read_ary[$i], $regs)) {
 586             $unseen = $regs[1];
 587         }
 588         if (preg_match('/MESSAGES\s+([0-9]+)/i', $read_ary[$i], $regs)) {
 589             $messages = $regs[1];
 590         }
 591         if (preg_match('/RECENT\s+([0-9]+)/i', $read_ary[$i], $regs)) {
 592             $recent = $regs[1];
 593         }
 594         $i++;
 595     }
 596     return array('MESSAGES' => $messages, 'UNSEEN'=>$unseen, 'RECENT' => $recent);
 597 }
 598
 599
 600 /*
 601  *  Saves a message to a given folder -- used for saving sent messages
 602  */
 603 function sqimap_append ($imap_stream, $sent_folder, $length) {
 604     fputs ($imap_stream, sqimap_session_id() . " APPEND \"$sent_folder\" (\\Seen) \{$length}\r\n");
 605     $tmp = fgets ($imap_stream, 1024);
 606 }
 607
 608 function sqimap_append_done ($imap_stream, $folder='') {
 609     global $squirrelmail_language, $color;
 610     fputs ($imap_stream, "\r\n");
 611     $tmp = fgets ($imap_stream, 1024);
 612     if (preg_match("/(.*)(BAD|NO)(.*)$/", $tmp, $regs)) {
 613         set_up_language($squirrelmail_language);
 614         require_once(SM_PATH . 'functions/display_messages.php');
 615         $reason = $regs[3];
 616         if ($regs[2] == 'NO') {
 617            $string = "<b><font color=$color[2]>\n" .
 618                   _("ERROR : Could not append message to") ." $folder." .
 619                   "</b><br>\n" .
 620                   _("Server responded: ") .
 621                   $reason . "<br>\n";
 622            if (preg_match("/(.*)(quota)(.*)$/i", $reason, $regs)) {
 623               $string .= _("Solution: ") .
 624             _("Remove unneccessary messages from your folder and start with your Trash folder.")
 625               ."<br>\n";
 626            }
 627            $string .= "</font>\n";
 628            error_box($string,$color);
 629         } else {
 630            $string = "<b><font color=$color[2]>\n" .
 631                   _("ERROR : Bad or malformed request.") .
 632                   "</b><br>\n" .
 633                   _("Server responded: ") .
 634                   $tmp . "</font><br>\n";
 635            error_box($string,$color);
 636            exit;
 637         }
 638     }
 639 }
 640
 641 function sqimap_get_user_server ($imap_server, $username) {
 642    if (substr($imap_server, 0, 4) != "map:") {
 643        return $imap_server;
 644    }
 645    $function = substr($imap_server, 4);
 646    return $function($username);
 647 }
 648
 649 /* This is an example that gets imapservers from yellowpages (NIS).
 650  * you can simple put map:map_yp_alias in your $imap_server_address
 651  * in config.php use your own function instead map_yp_alias to map your
 652  * LDAP whatever way to find the users imapserver. */
 653
 654 function map_yp_alias($username) {
 655    $yp = `ypmatch $username aliases`;
 656    return chop(substr($yp, strlen($username)+1));
 657 }
 658
 659 ?>