inc/main/classes/listener/class_BaseListener.php

   1 <?php
   2 // Own namespace
   3 namespace CoreFramework\Listener;
   4
   5 // Import framework stuff
   6 use CoreFramework\Factory\ObjectFactory;
   7 use CoreFramework\Object\BaseFrameworkSystem;
   8
   9 /**
  10  * A general listener class
  11  *
  12  * @author              Roland Haeder <webmaster@shipsimu.org>
  13  * @version             0.0.0
  14  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
  15  * @license             GNU GPL 3.0 or any newer version
  16  * @link                http://www.shipsimu.org
  17  *
  18  * This program is free software: you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation, either version 3 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31 class BaseListener extends BaseFrameworkSystem implements Visitable {
  32         // Exception code constants
  33         const EXCEPTION_INVALID_SOCKET                   = 0xa00;
  34         const EXCEPTION_SOCKET_ALREADY_REGISTERED        = 0xa01;
  35         const EXCEPTION_SOCKET_CREATION_FAILED           = 0xa02;
  36         const EXCEPTION_NO_SOCKET_ERROR                  = 0xa03;
  37         const EXCEPTION_CONNECTION_ALREADY_REGISTERED    = 0xa04;
  38         const EXCEPTION_UNEXPECTED_PACKAGE_STATUS        = 0xa05;
  39         const EXCEPTION_UNSUPPORTED_PACKAGE_CODE_HANDLER = 0xa06;
  40         const EXCEPTION_FINAL_CHUNK_VERIFICATION         = 0xa07;
  41         const EXCEPTION_INVALID_DATA_CHECKSUM            = 0xa08;
  42
  43         /**
  44          * Address (IP mostly) we shall listen on
  45          */
  46         private $listenAddress = '0.0.0.0'; // This is the default and listens on all interfaces
  47
  48         /**
  49          * Port we shall listen on (or wait for incoming data)
  50          */
  51         private $listenPort = 0; // This port MUST be changed by your application
  52
  53         /**
  54          * Whether we are in blocking or non-blocking mode (default: non-blocking
  55          */
  56         private $blockingMode = FALSE;
  57
  58         /**
  59          * A peer pool instance
  60          */
  61         private $poolInstance = NULL;
  62
  63         /**
  64          * Protected constructor
  65          *
  66          * @param       $className      Name of the class
  67          * @return      void
  68          */
  69         protected function __construct ($className) {
  70                 // Call parent constructor
  71                 parent::__construct($className);
  72         }
  73
  74         /**
  75          * Checks whether the given socket resource is a server socket
  76          *
  77          * @param       $socketResource         A valid socket resource
  78          * @return      $isServerSocket         Whether the socket resource is a server socket
  79          */
  80         protected function isServerSocketResource ($socketResource) {
  81                 // Check it
  82                 $isServerSocket = ((is_resource($socketResource)) && (!@socket_getpeername($socketResource, $peerName)));
  83
  84                 // We need to clear the error here if it is a resource
  85                 if ($isServerSocket === TRUE) {
  86                         // Clear the error
  87                         //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('socketResource[]=' . gettype($socketResource));
  88                         socket_clear_error($socketResource);
  89                 } // END - if
  90
  91                 // Check peer name, it must be empty
  92                 $isServerSocket = (($isServerSocket) && (empty($peerName)));
  93
  94                 // Return result
  95                 return $isServerSocket;
  96         }
  97
  98         /**
  99          * Setter for listen address
 100          *
 101          * @param       $listenAddress  The address this listener should listen on
 102          * @return      void
 103          */
 104         protected final function setListenAddress ($listenAddress) {
 105                 $this->listenAddress = (string) $listenAddress;
 106         }
 107
 108         /**
 109          * Getter for listen address
 110          *
 111          * @return      $listenAddress  The address this listener should listen on
 112          */
 113         public final function getListenAddress () {
 114                 return $this->listenAddress;
 115         }
 116
 117         /**
 118          * Setter for listen port
 119          *
 120          * @param       $listenPort             The port this listener should listen on
 121          * @return      void
 122          */
 123         protected final function setListenPort ($listenPort) {
 124                 $this->listenPort = (int) $listenPort;
 125         }
 126
 127         /**
 128          * Getter for listen port
 129          *
 130          * @return      $listenPort             The port this listener should listen on
 131          */
 132         public final function getListenPort () {
 133                 return $this->listenPort;
 134         }
 135
 136         /**
 137          * "Setter" to set listen address from configuration entry
 138          *
 139          * @param       $configEntry    The configuration entry holding our listen address
 140          * @return      void
 141          */
 142         public final function setListenAddressByConfiguration ($configEntry) {
 143                 $this->setListenAddress($this->getConfigInstance()->getConfigEntry($configEntry));
 144         }
 145
 146         /**
 147          * "Setter" to set listen port from configuration entry
 148          *
 149          * @param       $configEntry    The configuration entry holding our listen port
 150          * @return      void
 151          */
 152         public final function setListenPortByConfiguration ($configEntry) {
 153                 $this->setListenPort($this->getConfigInstance()->getConfigEntry($configEntry));
 154         }
 155
 156         /**
 157          * Setter for blocking-mode
 158          *
 159          * @param       $blockingMode   Whether blocking-mode is disabled (default) or enabled
 160          * @return      void
 161          */
 162         protected final function setBlockingMode ($blockingMode) {
 163                 $this->blockingMode = (boolean) $blockingMode;
 164         }
 165
 166         /**
 167          * Checks whether blocking-mode is enabled or disabled
 168          *
 169          * @return      $blockingMode   Whether blocking mode is disabled or enabled
 170          */
 171         public final function isBlockingModeEnabled () {
 172                 return $this->blockingMode;
 173         }
 174
 175         /**
 176          * Setter for peer pool instance
 177          *
 178          * @param       $poolInstance   The peer pool instance we shall set
 179          * @return      void
 180          */
 181         protected final function setPoolInstance (PoolablePeer $poolInstance) {
 182                 $this->poolInstance = $poolInstance;
 183         }
 184
 185         /**
 186          * Getter for peer pool instance
 187          *
 188          * @return      $poolInstance   The peer pool instance we shall set
 189          */
 190         public final function getPoolInstance () {
 191                 return $this->poolInstance;
 192         }
 193
 194         /**
 195          * Getter for connection type
 196          *
 197          * @return      $connectionType         Connection type for this listener
 198          */
 199         public final function getConnectionType () {
 200                 // Wrap the real getter
 201                 return $this->getProtocolName();
 202         }
 203
 204         /**
 205          * Registeres the given socket resource for "this" listener instance. This
 206          * will be done in a seperate class to allow package writers to use it
 207          * again.
 208          *
 209          * @param       $socketResource         A valid server socket resource
 210          * @return      void
 211          * @throws      InvalidServerSocketException            If the given resource is no server socket
 212          * @throws      SocketAlreadyRegisteredException        If the given resource is already registered
 213          */
 214         protected function registerServerSocketResource ($socketResource) {
 215                 // First check if it is valid
 216                 if (!$this->isServerSocketResource($socketResource)) {
 217                         // No server socket
 218                         throw new InvalidServerSocketException(array($this, $socketResource), self::EXCEPTION_INVALID_SOCKET);
 219                 } elseif ($this->isServerSocketRegistered($socketResource)) {
 220                         // Already registered
 221                         throw new SocketAlreadyRegisteredException($this, self::EXCEPTION_SOCKET_ALREADY_REGISTERED);
 222                 }
 223
 224                 // Get a socket registry instance (singleton)
 225                 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
 226
 227                 // Get a connection info instance
 228                 $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($this->getProtocolName(), 'listener');
 229
 230                 // Will the info instance with listener data
 231                 $infoInstance->fillWithListenerInformation($this);
 232
 233                 // Register the socket
 234                 $registryInstance->registerSocket($infoInstance, $socketResource);
 235
 236                 // And set it here
 237                 $this->setSocketResource($socketResource);
 238         }
 239
 240         /**
 241          * Checks whether given socket resource is registered in socket registry
 242          *
 243          * @param       $socketResource         A valid server socket resource
 244          * @return      $isRegistered           Whether given server socket is registered
 245          */
 246         protected function isServerSocketRegistered ($socketResource) {
 247                 // Get a socket registry instance (singleton)
 248                 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
 249
 250                 // Get a connection info instance
 251                 $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($this->getProtocolName(), 'listener');
 252
 253                 // Will the info instance with listener data
 254                 $infoInstance->fillWithListenerInformation($this);
 255
 256                 // Check it
 257                 $isRegistered = $registryInstance->isSocketRegistered($infoInstance, $socketResource);
 258
 259                 // Return result
 260                 return $isRegistered;
 261         }
 262
 263         /**
 264          * Accepts the visitor to process the visit "request"
 265          *
 266          * @param       $visitorInstance        An instance of a Visitor class
 267          * @return      void
 268          */
 269         public function accept (Visitor $visitorInstance) {
 270                 // Debug message
 271                 //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(strtoupper($this->getProtocolName()) . '-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - CALLED!');
 272
 273                 // Visit this listener
 274                 $visitorInstance->visitListener($this);
 275
 276                 // Visit the pool if set
 277                 if ($this->getPoolInstance() instanceof Poolable) {
 278                         $this->getPoolInstance()->accept($visitorInstance);
 279                 } // END - if
 280
 281                 // Debug message
 282                 //* DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(strtoupper($this->getProtocolName()) . '-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - EXIT!');
 283         }
 284
 285         /**
 286          * Monitors incoming raw data from the handler and transfers it to the
 287          * given receiver instance. This method should not be called, please call
 288          * the decorator's version instead to separator node/client traffic.
 289          *
 290          * @return      void
 291          * @throws      UnsupportedOperatorException    If this method is called by a mistake
 292          */
 293         public function monitorIncomingRawData () {
 294                 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
 295         }
 296
 297         /**
 298          * Constructs a callable method name from given socket error code. If the
 299          * method is not found, a generic one is used.
 300          *
 301          * @param       $errorCode              Error code from socket_last_error()
 302          * @return      $handlerName    Call-back method name for the error handler
 303          * @throws      UnsupportedSocketErrorHandlerException If the error handler is not implemented
 304          */
 305         protected function getSocketErrorHandlerFromCode ($errorCode) {
 306                 // Create a name from translated error code
 307                 $handlerName = 'socketError' . self::convertToClassName($this->translateSocketErrorCodeToName($errorCode)) . 'Handler';
 308
 309                 // Is the call-back method there?
 310                 if (!method_exists($this, $handlerName)) {
 311                         // Please implement this
 312                         throw new UnsupportedSocketErrorHandlerException(array($this, $handlerName, $errorCode), BaseConnectionHelper::EXCEPTION_UNSUPPORTED_ERROR_HANDLER);
 313                 } // END - if
 314
 315                 // Return it
 316                 return $handlerName;
 317         }
 318
 319         /**
 320          * Translates socket error codes into our own internal names which can be
 321          * used for call-backs.
 322          *
 323          * @param       $errorCode      The error code from socket_last_error() to be translated
 324          * @return      $errorName      The translated name (all lower-case, with underlines)
 325          */
 326         public function translateSocketErrorCodeToName ($errorCode) {
 327                 // Nothing bad happened by default
 328                 $errorName = BaseRawDataHandler::SOCKET_CONNECTED;
 329
 330                 // Is the code a number, then we have to change it
 331                 switch ($errorCode) {
 332                         case 0: // Silently ignored, the socket is connected
 333                                 break;
 334
 335                         case 11:  // "Resource temporary unavailable"
 336                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_RESOURCE_UNAVAILABLE;
 337                                 break;
 338
 339                         case 13:  // "Permission denied"
 340                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_PERMISSION_DENIED;
 341                                 break;
 342
 343                         case 32:  // "Broken pipe"
 344                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_BROKEN_PIPE;
 345                                 break;
 346
 347                         case 104: // "Connection reset by peer"
 348                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_RESET_BY_PEER;
 349                                 break;
 350
 351                         case 107: // "Transport end-point not connected"
 352                         case 134: // On some (?) systems for 'transport end-point not connected'
 353                                 // @TODO On some systems it is 134, on some 107?
 354                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_TRANSPORT_ENDPOINT;
 355                                 break;
 356
 357                         case 110: // "Connection timed out"
 358                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_TIMED_OUT;
 359                                 break;
 360
 361                         case 111: // "Connection refused"
 362                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_REFUSED;
 363                                 break;
 364
 365                         case 113: // "No route to host"
 366                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_NO_ROUTE_TO_HOST;
 367                                 break;
 368
 369                         case 114: // "Operation already in progress"
 370                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_ALREADY_PROGRESS;
 371                                 break;
 372
 373                         case 115: // "Operation now in progress"
 374                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_IN_PROGRESS;
 375                                 break;
 376
 377                         default: // Everything else <> 0
 378                                 // Unhandled error code detected, so first debug it because we may want to handle it like the others
 379                                 self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-HUB[' . __METHOD__ . ':' . __LINE__ . '] UNKNOWN ERROR CODE = ' . $errorCode . ', MESSAGE = ' . socket_strerror($errorCode));
 380
 381                                 // Change it only in this class
 382                                 $errorName = BaseRawDataHandler::SOCKET_ERROR_UNKNOWN;
 383                                 break;
 384                 }
 385
 386                 // Return translated name
 387                 return $errorName;
 388         }
 389
 390         /**
 391          * Shuts down a given socket resource. This method does only ease calling
 392          * the right visitor.
 393          *
 394          * @param       $socketResource         A valid socket resource
 395          * @return      void
 396          */
 397         public function shutdownSocket ($socketResource) {
 398                 // Debug message
 399                 self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('HUB-SYSTEM: Shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...');
 400
 401                 // Set socket resource
 402                 $this->setSocketResource($socketResource);
 403
 404                 // Get a visitor instance
 405                 $visitorInstance = ObjectFactory::createObjectByConfiguredName('shutdown_socket_visitor_class');
 406
 407                 // Debug output
 408                 self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString());
 409
 410                 // Call the visitor
 411                 $this->accept($visitorInstance);
 412         }
 413
 414         /**
 415          * Half-shuts down a given socket resource. This method does only ease calling
 416          * an other visitor than shutdownSocket() does.
 417          *
 418          * @param       $socketResource         A valid socket resource
 419          * @return      void
 420          */
 421         public function halfShutdownSocket ($socketResource) {
 422                 // Debug message
 423                 self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('HUB-SYSTEM: Half-shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...');
 424
 425                 // Set socket resource
 426                 $this->setSocketResource($socketResource);
 427
 428                 // Get a visitor instance
 429                 $visitorInstance = ObjectFactory::createObjectByConfiguredName('half_shutdown_socket_visitor_class');
 430
 431                 // Debug output
 432                 self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString());
 433
 434                 // Call the visitor
 435                 $this->accept($visitorInstance);
 436         }
 437
 438         // ************************************************************************
 439         //                 Socket error handler call-back methods
 440         // ************************************************************************
 441
 442         /**
 443          * Handles socket error 'permission denied', but does not clear it for
 444          * later debugging purposes.
 445          *
 446          * @param       $socketResource         A valid socket resource
 447          * @param       $socketData                     A valid socket data array (0 = IP/file name, 1 = port)
 448          * @return      void
 449          * @throws      SocketBindingException  The socket could not be bind to
 450          */
 451         protected function socketErrorPermissionDeniedHandler ($socketResource, array $socketData) {
 452                 // Get socket error code for verification
 453                 $socketError = socket_last_error($socketResource);
 454
 455                 // Get error message
 456                 $errorMessage = socket_strerror($socketError);
 457
 458                 // Shutdown this socket
 459                 $this->shutdownSocket($socketResource);
 460
 461                 // Throw it again
 462                 throw new SocketBindingException(array($this, $socketData, $socketResource, $socketError, $errorMessage), BaseListener::EXCEPTION_INVALID_SOCKET);
 463         }
 464
 465         /**
 466          * "Listens" for incoming network packages
 467          *
 468          * @param       $peerSuffix             Suffix for peer name (e.g. :0 for TCP(/UDP?) connections)
 469          * @return      void
 470          * @throws      InvalidSocketException  If an invalid socket resource has been found
 471          */
 472         protected function doListenSocketSelect ($peerSuffix) {
 473                 // Check on all instances
 474                 assert($this->getPoolInstance() instanceof Poolable);
 475                 assert(is_resource($this->getSocketResource()));
 476
 477                 // Get all readers
 478                 $readers = $this->getPoolInstance()->getAllSingleSockets();
 479                 $writers = array();
 480                 $excepts = array();
 481
 482                 // Check if we have some peers left
 483                 $left = socket_select(
 484                         $readers,
 485                         $writers,
 486                         $excepts,
 487                         0,
 488                         150
 489                 );
 490
 491                 // Some new peers found?
 492                 if ($left < 1) {
 493                         // Debug message
 494                         //* EXTREME-NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: left=' . $left . ',serverSocket=' . $this->getSocketResource() . ',readers=' . print_r($readers, TRUE));
 495
 496                         // Nothing new found
 497                         return;
 498                 } // END - if
 499
 500                 // Debug message
 501                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: serverSocket=' . $this->getSocketResource() . ',readers=' . print_r($readers, TRUE));
 502
 503                 // Do we have changed peers?
 504                 if (in_array($this->getSocketResource(), $readers)) {
 505                         /*
 506                          * Then accept it, if this socket is set to non-blocking IO and the
 507                          * connection is NOT sending any data, socket_read() may throw
 508                          * error 11 (Resource temporary unavailable). This really nasty
 509                          * because if you have blocking IO socket_read() will wait and wait
 510                          * and wait ...
 511                          */
 512                         $newSocket = socket_accept($this->getSocketResource());
 513
 514                         // Debug message
 515                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: newSocket=' . $newSocket . ',serverSocket=' .$this->getSocketResource());
 516
 517                         // Array for timeout settings
 518                         $options  = array(
 519                                 // Seconds
 520                                 'sec'  => $this->getConfigInstance()->getConfigEntry('tcp_socket_accept_wait_sec'),
 521                                 // Milliseconds
 522                                 'usec' => $this->getConfigInstance()->getConfigEntry('tcp_socket_accept_wait_usec')
 523                         );
 524
 525                         // Set timeout to configured seconds
 526                         // @TODO Does this work on Windozer boxes???
 527                         if (!socket_set_option($newSocket, SOL_SOCKET, SO_RCVTIMEO, $options)) {
 528                                 // Handle this socket error with a faked recipientData array
 529                                 $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0'));
 530                         } // END - if
 531
 532                         // Output result (only for debugging!)
 533                         /*
 534                         $option = socket_get_option($newSocket, SOL_SOCKET, SO_RCVTIMEO);
 535                         self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('SO_RCVTIMEO[' . gettype($option) . ']=' . print_r($option, TRUE));
 536                         */
 537
 538                         // Enable SO_OOBINLINE
 539                         if (!socket_set_option($newSocket, SOL_SOCKET, SO_OOBINLINE ,1)) {
 540                                 // Handle this socket error with a faked recipientData array
 541                                 $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0'));
 542                         } // END - if
 543
 544                         // Set non-blocking
 545                         if (!socket_set_nonblock($newSocket)) {
 546                                 // Handle this socket error with a faked recipientData array
 547                                 $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0'));
 548                         } // END - if
 549
 550                         // Add it to the peers
 551                         $this->getPoolInstance()->addPeer($newSocket, BaseConnectionHelper::CONNECTION_TYPE_INCOMING);
 552
 553                         // Get peer name
 554                         if (!socket_getpeername($newSocket, $peerName)) {
 555                                 // Handle this socket error with a faked recipientData array
 556                                 $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0'));
 557                         } // END - if
 558
 559                         // Get node instance
 560                         $nodeInstance = NodeObjectFactory::createNodeInstance();
 561
 562                         // Create a faked package data array
 563                         $packageData = array(
 564                                 NetworkPackage::PACKAGE_DATA_SENDER    => $peerName . $peerSuffix,
 565                                 NetworkPackage::PACKAGE_DATA_RECIPIENT => $nodeInstance->getSessionId(),
 566                                 NetworkPackage::PACKAGE_DATA_STATUS    => NetworkPackage::PACKAGE_STATUS_FAKED
 567                         );
 568
 569                         // Get a connection info instance
 570                         $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($this->getProtocolName(), 'listener');
 571
 572                         // Will the info instance with listener data
 573                         $infoInstance->fillWithListenerInformation($this);
 574
 575                         // Get a socket registry
 576                         $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
 577
 578                         // Register the socket with the registry and with the faked array
 579                         $registryInstance->registerSocket($infoInstance, $newSocket, $packageData);
 580                 } // END - if
 581
 582                 // Do we have to rewind?
 583                 if (!$this->getIteratorInstance()->valid()) {
 584                         // Rewind the list
 585                         $this->getIteratorInstance()->rewind();
 586                 } // END - if
 587
 588                 // Get the current value
 589                 $currentSocket = $this->getIteratorInstance()->current();
 590
 591                 // Handle it here, if not main server socket
 592                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: currentSocket=' . $currentSocket[BasePool::SOCKET_ARRAY_RESOURCE] . ',type=' . $currentSocket[BasePool::SOCKET_ARRAY_CONN_TYPE] . ',serverSocket=' . $this->getSocketResource());
 593                 if (($currentSocket[BasePool::SOCKET_ARRAY_CONN_TYPE] != BaseConnectionHelper::CONNECTION_TYPE_SERVER) && ($currentSocket[BasePool::SOCKET_ARRAY_RESOURCE] != $this->getSocketResource())) {
 594                         // ... or else it will raise warnings like 'Transport endpoint is not connected'
 595                         $this->getHandlerInstance()->processRawDataFromResource($currentSocket);
 596                 } // END - if
 597
 598                 // Advance to next entry. This should be the last line.
 599                 $this->getIteratorInstance()->next();
 600         }
 601
 602 }