mod/dfrn_poll.php

   1 <?php
   2 /**
   3  * @file mod/dfrn_poll.php
   4  */
   5 use Friendica\App;
   6 use Friendica\Core\Config;
   7 use Friendica\Core\System;
   8 use Friendica\Database\DBM;
   9 use Friendica\Protocol\DFRN;
  10 use Friendica\Protocol\OStatus;
  11
  12 require_once 'include/items.php';
  13 require_once 'include/auth.php';
  14
  15 function dfrn_poll_init(App $a) {
  16         $dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
  17         $type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
  18         $last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
  19         $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
  20         $challenge       = ((x($_GET,'challenge'))       ? $_GET['challenge']            : '');
  21         $sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
  22         $dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
  23         $perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
  24         $quiet                   = ((x($_GET,'quiet'))                   ? true                                                  : false);
  25
  26         // Possibly it is an OStatus compatible server that requests a user feed
  27         if (($a->argc > 1) && ($dfrn_id == '') && !strstr($_SERVER["HTTP_USER_AGENT"], 'Friendica')) {
  28                 $nickname = $a->argv[1];
  29                 header("Content-type: application/atom+xml");
  30                 echo OStatus::feed($a, $nickname, $last_update, 10);
  31                 killme();
  32         }
  33
  34         $direction = (-1);
  35
  36
  37         if(strpos($dfrn_id,':') == 1) {
  38                 $direction = intval(substr($dfrn_id,0,1));
  39                 $dfrn_id   = substr($dfrn_id,2);
  40         }
  41
  42         $hidewall = false;
  43
  44         if(($dfrn_id === '') && (! x($_POST,'dfrn_id'))) {
  45                 if((Config::get('system','block_public')) && (! local_user()) && (! remote_user())) {
  46                         http_status_exit(403);
  47                 }
  48
  49                 $user = '';
  50                 if($a->argc > 1) {
  51                         $r = q("SELECT `hidewall`,`nickname` FROM `user` WHERE `user`.`nickname` = '%s' LIMIT 1",
  52                                 dbesc($a->argv[1])
  53                         );
  54                         if (!$r)
  55                                 http_status_exit(404);
  56
  57                         $hidewall = ($r[0]['hidewall'] && !local_user());
  58
  59                         $user = $r[0]['nickname'];
  60                 }
  61
  62                 logger('dfrn_poll: public feed request from ' . $_SERVER['REMOTE_ADDR'] . ' for ' . $user);
  63                 header("Content-type: application/atom+xml");
  64                 echo DFRN::feed('', $user,$last_update, 0, $hidewall);
  65                 killme();
  66         }
  67
  68         if(($type === 'profile') && (! strlen($sec))) {
  69
  70                 $sql_extra = '';
  71                 switch($direction) {
  72                         case (-1):
  73                                 $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
  74                                 $my_id = $dfrn_id;
  75                                 break;
  76                         case 0:
  77                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  78                                 $my_id = '1:' . $dfrn_id;
  79                                 break;
  80                         case 1:
  81                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
  82                                 $my_id = '0:' . $dfrn_id;
  83                                 break;
  84                         default:
  85                                 goaway(System::baseUrl());
  86                                 break; // NOTREACHED
  87                 }
  88
  89                 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
  90                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
  91                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
  92                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
  93                         dbesc($a->argv[1])
  94                 );
  95
  96                 if (DBM::is_result($r)) {
  97
  98                         $s = fetch_url($r[0]['poll'] . '?dfrn_id=' . $my_id . '&type=profile-check');
  99
 100                         logger("dfrn_poll: old profile returns " . $s, LOGGER_DATA);
 101
 102                         if(strlen($s)) {
 103
 104                                 $xml = parse_xml_string($s);
 105
 106                                 if((int) $xml->status == 1) {
 107                                         $_SESSION['authenticated'] = 1;
 108                                         if(! x($_SESSION,'remote'))
 109                                                 $_SESSION['remote'] = array();
 110
 111                                         $_SESSION['remote'][] = array('cid' => $r[0]['id'],'uid' => $r[0]['uid'],'url' => $r[0]['url']);
 112
 113                                         $_SESSION['visitor_id'] = $r[0]['id'];
 114                                         $_SESSION['visitor_home'] = $r[0]['url'];
 115                                         $_SESSION['visitor_handle'] = $r[0]['addr'];
 116                                         $_SESSION['visitor_visiting'] = $r[0]['uid'];
 117                                         if(!$quiet)
 118                                                 info( sprintf(t('%1$s welcomes %2$s'), $r[0]['username'] , $r[0]['name']) . EOL);
 119                                         // Visitors get 1 day session.
 120                                         $session_id = session_id();
 121                                         $expire = time() + 86400;
 122                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s'",
 123                                                 dbesc($expire),
 124                                                 dbesc($session_id)
 125                                         );
 126                                 }
 127                         }
 128                         $profile = $r[0]['nickname'];
 129                         goaway((strlen($destination_url)) ? $destination_url : System::baseUrl() . '/profile/' . $profile);
 130                 }
 131                 goaway(System::baseUrl());
 132
 133         }
 134
 135         if($type === 'profile-check' && $dfrn_version < 2.2 ) {
 136
 137                 if((strlen($challenge)) && (strlen($sec))) {
 138
 139                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 140                         $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 141                                 dbesc($sec)
 142                         );
 143                         if (! DBM::is_result($r)) {
 144                                 xml_status(3, 'No ticket');
 145                                 // NOTREACHED
 146                         }
 147                         $orig_id = $r[0]['dfrn_id'];
 148                         if(strpos($orig_id, ':'))
 149                                 $orig_id = substr($orig_id,2);
 150
 151                         $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 152                                 intval($r[0]['cid'])
 153                         );
 154                         if (! DBM::is_result($c)) {
 155                                 xml_status(3, 'No profile');
 156                         }
 157                         $contact = $c[0];
 158
 159                         $sent_dfrn_id = hex2bin($dfrn_id);
 160                         $challenge    = hex2bin($challenge);
 161
 162                         $final_dfrn_id = '';
 163
 164                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 165                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 166                                 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
 167                         }
 168                         else {
 169                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 170                                 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
 171                         }
 172
 173                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 174
 175                         if(strpos($final_dfrn_id,':') == 1)
 176                                 $final_dfrn_id = substr($final_dfrn_id,2);
 177
 178                         if($final_dfrn_id != $orig_id) {
 179                                 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 180                                 // did not decode properly - cannot trust this site
 181                                 xml_status(3, 'Bad decryption');
 182                         }
 183
 184                         header("Content-type: text/xml");
 185                         echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 186                         killme();
 187                         // NOTREACHED
 188                 }
 189                 else {
 190                                 // old protocol
 191
 192                         switch($direction) {
 193                                 case 1:
 194                                         $dfrn_id = '0:' . $dfrn_id;
 195                                         break;
 196                                 case 0:
 197                                         $dfrn_id = '1:' . $dfrn_id;
 198                                         break;
 199                                 default:
 200                                         break;
 201                         }
 202
 203
 204                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 205                         $r = q("SELECT * FROM `profile_check` WHERE `dfrn_id` = '%s' ORDER BY `expire` DESC",
 206                                 dbesc($dfrn_id));
 207                         if (DBM::is_result($r)) {
 208                                 xml_status(1);
 209                                 return; // NOTREACHED
 210                         }
 211                         xml_status(0);
 212                         return; // NOTREACHED
 213                 }
 214         }
 215
 216 }
 217
 218
 219
 220 function dfrn_poll_post(App $a) {
 221
 222         $dfrn_id      = ((x($_POST,'dfrn_id'))      ? $_POST['dfrn_id']              : '');
 223         $challenge    = ((x($_POST,'challenge'))    ? $_POST['challenge']            : '');
 224         $url          = ((x($_POST,'url'))          ? $_POST['url']                  : '');
 225         $sec          = ((x($_POST,'sec'))          ? $_POST['sec']                  : '');
 226         $ptype        = ((x($_POST,'type'))         ? $_POST['type']                 : '');
 227         $dfrn_version = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 228         $perm         = ((x($_POST,'perm'))         ? $_POST['perm']                 : 'r');
 229
 230         if($ptype === 'profile-check') {
 231
 232                 if((strlen($challenge)) && (strlen($sec))) {
 233
 234                         logger('dfrn_poll: POST: profile-check');
 235
 236                         q("DELETE FROM `profile_check` WHERE `expire` < " . intval(time()));
 237                         $r = q("SELECT * FROM `profile_check` WHERE `sec` = '%s' ORDER BY `expire` DESC LIMIT 1",
 238                                 dbesc($sec)
 239                         );
 240                         if (! DBM::is_result($r)) {
 241                                 xml_status(3, 'No ticket');
 242                                 // NOTREACHED
 243                         }
 244                         $orig_id = $r[0]['dfrn_id'];
 245                         if(strpos($orig_id, ':'))
 246                                 $orig_id = substr($orig_id,2);
 247
 248                         $c = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 249                                 intval($r[0]['cid'])
 250                         );
 251                         if (! DBM::is_result($c)) {
 252                                 xml_status(3, 'No profile');
 253                         }
 254                         $contact = $c[0];
 255
 256                         $sent_dfrn_id = hex2bin($dfrn_id);
 257                         $challenge    = hex2bin($challenge);
 258
 259                         $final_dfrn_id = '';
 260
 261                         if(($contact['duplex']) && strlen($contact['prvkey'])) {
 262                                 openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
 263                                 openssl_private_decrypt($challenge,$decoded_challenge,$contact['prvkey']);
 264                         }
 265                         else {
 266                                 openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
 267                                 openssl_public_decrypt($challenge,$decoded_challenge,$contact['pubkey']);
 268                         }
 269
 270                         $final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
 271
 272                         if(strpos($final_dfrn_id,':') == 1)
 273                                 $final_dfrn_id = substr($final_dfrn_id,2);
 274
 275                         if($final_dfrn_id != $orig_id) {
 276                                 logger('profile_check: ' . $final_dfrn_id . ' != ' . $orig_id, LOGGER_DEBUG);
 277                                 // did not decode properly - cannot trust this site
 278                                 xml_status(3, 'Bad decryption');
 279                         }
 280
 281                         header("Content-type: text/xml");
 282                         echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?><dfrn_poll><status>0</status><challenge>$decoded_challenge</challenge><sec>$sec</sec></dfrn_poll>";
 283                         killme();
 284                         // NOTREACHED
 285                 }
 286
 287         }
 288
 289         $direction    = (-1);
 290         if(strpos($dfrn_id,':') == 1) {
 291                 $direction = intval(substr($dfrn_id,0,1));
 292                 $dfrn_id   = substr($dfrn_id,2);
 293         }
 294
 295
 296         $r = q("SELECT * FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s' LIMIT 1",
 297                 dbesc($dfrn_id),
 298                 dbesc($challenge)
 299         );
 300
 301         if (! DBM::is_result($r)) {
 302                 killme();
 303         }
 304
 305         $type = $r[0]['type'];
 306         $last_update = $r[0]['last_update'];
 307
 308         $r = q("DELETE FROM `challenge` WHERE `dfrn-id` = '%s' AND `challenge` = '%s'",
 309                 dbesc($dfrn_id),
 310                 dbesc($challenge)
 311         );
 312
 313
 314         $sql_extra = '';
 315         switch($direction) {
 316                 case (-1):
 317                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 318                         $my_id = $dfrn_id;
 319                         break;
 320                 case 0:
 321                         $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 322                         $my_id = '1:' . $dfrn_id;
 323                         break;
 324                 case 1:
 325                         $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 326                         $my_id = '0:' . $dfrn_id;
 327                         break;
 328                 default:
 329                         goaway(System::baseUrl());
 330                         break; // NOTREACHED
 331         }
 332
 333
 334         $r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 $sql_extra LIMIT 1");
 335
 336
 337         if (! DBM::is_result($r)) {
 338                 killme();
 339         }
 340
 341         $contact = $r[0];
 342         $owner_uid = $r[0]['uid'];
 343         $contact_id = $r[0]['id'];
 344
 345
 346         if($type === 'reputation' && strlen($url)) {
 347                 $r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 348                         dbesc($url),
 349                         intval($owner_uid)
 350                 );
 351                 $reputation = 0;
 352                 $text = '';
 353
 354                 if (DBM::is_result($r)) {
 355                         $reputation = $r[0]['rating'];
 356                         $text = $r[0]['reason'];
 357
 358                         if($r[0]['id'] == $contact_id) {        // inquiring about own reputation not allowed
 359                                 $reputation = 0;
 360                                 $text = '';
 361                         }
 362                 }
 363
 364                 echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
 365                 <reputation>
 366                         <url>$url</url>
 367                         <rating>$reputation</rating>
 368                         <description>$text</description>
 369                 </reputation>
 370                 ";
 371                 killme();
 372                 // NOTREACHED
 373         }
 374         else {
 375
 376                 // Update the writable flag if it changed
 377                 logger('dfrn_poll: post request feed: ' . print_r($_POST,true),LOGGER_DATA);
 378                 if($dfrn_version >= 2.21) {
 379                         if($perm === 'rw')
 380                                 $writable = 1;
 381                         else
 382                                 $writable = 0;
 383
 384                         if($writable !=  $contact['writable']) {
 385                                 q("UPDATE `contact` SET `writable` = %d WHERE `id` = %d",
 386                                         intval($writable),
 387                                         intval($contact_id)
 388                                 );
 389                         }
 390                 }
 391
 392                 header("Content-type: application/atom+xml");
 393                 $o = DFRN::feed($dfrn_id, $a->argv[1], $last_update, $direction);
 394                 echo $o;
 395                 killme();
 396
 397         }
 398 }
 399
 400 function dfrn_poll_content(App $a) {
 401
 402         $dfrn_id         = ((x($_GET,'dfrn_id'))         ? $_GET['dfrn_id']              : '');
 403         $type            = ((x($_GET,'type'))            ? $_GET['type']                 : 'data');
 404         $last_update     = ((x($_GET,'last_update'))     ? $_GET['last_update']          : '');
 405         $destination_url = ((x($_GET,'destination_url')) ? $_GET['destination_url']      : '');
 406         $sec             = ((x($_GET,'sec'))             ? $_GET['sec']                  : '');
 407         $dfrn_version    = ((x($_GET,'dfrn_version'))    ? (float) $_GET['dfrn_version'] : 2.0);
 408         $perm            = ((x($_GET,'perm'))            ? $_GET['perm']                 : 'r');
 409         $quiet           = ((x($_GET,'quiet'))           ? true                          : false);
 410
 411         $direction = (-1);
 412         if(strpos($dfrn_id,':') == 1) {
 413                 $direction = intval(substr($dfrn_id,0,1));
 414                 $dfrn_id = substr($dfrn_id,2);
 415         }
 416
 417
 418         if($dfrn_id != '') {
 419                 // initial communication from external contact
 420                 $hash = random_string();
 421
 422                 $status = 0;
 423
 424                 $r = q("DELETE FROM `challenge` WHERE `expire` < " . intval(time()));
 425
 426                 if($type !== 'profile') {
 427                         $r = q("INSERT INTO `challenge` ( `challenge`, `dfrn-id`, `expire` , `type`, `last_update` )
 428                                 VALUES( '%s', '%s', '%s', '%s', '%s' ) ",
 429                                 dbesc($hash),
 430                                 dbesc($dfrn_id),
 431                                 intval(time() + 60 ),
 432                                 dbesc($type),
 433                                 dbesc($last_update)
 434                         );
 435                 }
 436                 $sql_extra = '';
 437                 switch($direction) {
 438                         case (-1):
 439                                 if($type === 'profile')
 440                                         $sql_extra = sprintf(" AND ( `dfrn-id` = '%s' OR `issued-id` = '%s' ) ", dbesc($dfrn_id),dbesc($dfrn_id));
 441                                 else
 442                                         $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
 443                                 $my_id = $dfrn_id;
 444                                 break;
 445                         case 0:
 446                                 $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 447                                 $my_id = '1:' . $dfrn_id;
 448                                 break;
 449                         case 1:
 450                                 $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
 451                                 $my_id = '0:' . $dfrn_id;
 452                                 break;
 453                         default:
 454                                 goaway(System::baseUrl());
 455                                 break; // NOTREACHED
 456                 }
 457
 458                 $nickname = $a->argv[1];
 459
 460                 $r = q("SELECT `contact`.*, `user`.`username`, `user`.`nickname`
 461                         FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 462                         WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
 463                         AND `user`.`nickname` = '%s' $sql_extra LIMIT 1",
 464                         dbesc($nickname)
 465                 );
 466
 467                 if (DBM::is_result($r)) {
 468
 469                         $challenge = '';
 470                         $encrypted_id = '';
 471                         $id_str = $my_id . '.' . mt_rand(1000,9999);
 472
 473                         if(($r[0]['duplex'] && strlen($r[0]['pubkey'])) || (! strlen($r[0]['prvkey']))) {
 474                                 openssl_public_encrypt($hash,$challenge,$r[0]['pubkey']);
 475                                 openssl_public_encrypt($id_str,$encrypted_id,$r[0]['pubkey']);
 476                         }
 477                         else {
 478                                 openssl_private_encrypt($hash,$challenge,$r[0]['prvkey']);
 479                                 openssl_private_encrypt($id_str,$encrypted_id,$r[0]['prvkey']);
 480                         }
 481
 482                         $challenge = bin2hex($challenge);
 483                         $encrypted_id = bin2hex($encrypted_id);
 484                 }
 485                 else {
 486                         $status = 1;
 487                         $challenge = '';
 488                         $encrypted_id = '';
 489                 }
 490
 491                 if(($type === 'profile') && (strlen($sec))) {
 492
 493                         // URL reply
 494
 495                         if($dfrn_version < 2.2) {
 496                                 $s = fetch_url($r[0]['poll']
 497                                         . '?dfrn_id=' . $encrypted_id
 498                                         . '&type=profile-check'
 499                                         . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 500                                         . '&challenge=' . $challenge
 501                                         . '&sec=' . $sec
 502                                 );
 503                         }
 504                         else {
 505                                 $s = post_url($r[0]['poll'], array(
 506                                         'dfrn_id' => $encrypted_id,
 507                                         'type' => 'profile-check',
 508                                         'dfrn_version' => DFRN_PROTOCOL_VERSION,
 509                                         'challenge' => $challenge,
 510                                         'sec' => $sec
 511                                 ));
 512                         }
 513
 514                         $profile = ((DBM::is_result($r) && $r[0]['nickname']) ? $r[0]['nickname'] : $nickname);
 515
 516                         switch($destination_url) {
 517                                 case 'profile':
 518                                         $dest = System::baseUrl() . '/profile/' . $profile . '?f=&tab=profile';
 519                                         break;
 520                                 case 'photos':
 521                                         $dest = System::baseUrl() . '/photos/' . $profile;
 522                                         break;
 523                                 case 'status':
 524                                 case '':
 525                                         $dest = System::baseUrl() . '/profile/' . $profile;
 526                                         break;
 527                                 default:
 528                                         $appendix = (strstr($destination_url, '?') ? '&f=&redir=1' : '?f=&redir=1');
 529                                         $dest = $destination_url . $appendix;
 530                                         break;
 531                         }
 532
 533                         logger("dfrn_poll: sec profile: " . $s, LOGGER_DATA);
 534
 535                         if(strlen($s) && strstr($s,'<?xml')) {
 536
 537                                 $xml = parse_xml_string($s);
 538
 539                                 logger('dfrn_poll: profile: parsed xml: ' . print_r($xml,true), LOGGER_DATA);
 540
 541                                 logger('dfrn_poll: secure profile: challenge: ' . $xml->challenge . ' expecting ' . $hash);
 542                                 logger('dfrn_poll: secure profile: sec: ' . $xml->sec . ' expecting ' . $sec);
 543
 544
 545                                 if(((int) $xml->status == 0) && ($xml->challenge == $hash)  && ($xml->sec == $sec)) {
 546                                         $_SESSION['authenticated'] = 1;
 547                                         if(! x($_SESSION,'remote'))
 548                                                 $_SESSION['remote'] = array();
 549                                         $_SESSION['remote'][] = array('cid' => $r[0]['id'],'uid' => $r[0]['uid'],'url' => $r[0]['url']);
 550                                         $_SESSION['visitor_id'] = $r[0]['id'];
 551                                         $_SESSION['visitor_home'] = $r[0]['url'];
 552                                         $_SESSION['visitor_visiting'] = $r[0]['uid'];
 553                                         if(!$quiet)
 554                                                 info( sprintf(t('%1$s welcomes %2$s'), $r[0]['username'] , $r[0]['name']) . EOL);
 555                                         // Visitors get 1 day session.
 556                                         $session_id = session_id();
 557                                         $expire = time() + 86400;
 558                                         q("UPDATE `session` SET `expire` = '%s' WHERE `sid` = '%s'",
 559                                                 dbesc($expire),
 560                                                 dbesc($session_id)
 561                                         );
 562                                 }
 563
 564                                 goaway($dest);
 565                         }
 566                         goaway($dest);
 567                         // NOTREACHED
 568
 569                 }
 570                 else {
 571                         // XML reply
 572                         header("Content-type: text/xml");
 573                         echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n"
 574                                 . '<dfrn_poll>' . "\r\n"
 575                                 . "\t" . '<status>' . $status . '</status>' . "\r\n"
 576                                 . "\t" . '<dfrn_version>' . DFRN_PROTOCOL_VERSION . '</dfrn_version>' . "\r\n"
 577                                 . "\t" . '<dfrn_id>' . $encrypted_id . '</dfrn_id>' . "\r\n"
 578                                 . "\t" . '<challenge>' . $challenge . '</challenge>' . "\r\n"
 579                                 . '</dfrn_poll>' . "\r\n" ;
 580                         killme();
 581                         // NOTREACHED
 582                 }
 583         }
 584 }