application/hub/main/nodes/class_BaseHubNode.php

   1 <?php
   2 /**
   3  * A general hub node class
   4  *
   5  * @author              Roland Haeder <webmaster@ship-simu.org>
   6  * @version             0.0.0
   7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub Developer Team
   8  * @license             GNU GPL 3.0 or any newer version
   9  * @link                http://www.ship-simu.org
  10  *
  11  * This program is free software: you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 3 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24 class BaseHubNode extends BaseHubSystem implements Updateable {
  25         /**
  26          * Node types
  27          */
  28         const NODE_TYPE_BOOT    = 'boot';
  29         const NODE_TYPE_MASTER  = 'master';
  30         const NODE_TYPE_LIST    = 'list';
  31         const NODE_TYPE_REGULAR = 'regular';
  32
  33         // Exception constants
  34         const EXCEPTION_HUB_ALREADY_ANNOUNCED = 0xe00;
  35
  36         // Other constants
  37         const OBJECT_LIST_SEPARATOR = ',';
  38
  39         /**
  40          * IP/port number of bootstrapping node
  41          */
  42         private $bootIpPort = '';
  43
  44         /**
  45          * Query connector instance
  46          */
  47         private $queryConnectorInstance = NULL;
  48
  49         /**
  50          * Queue connector instance
  51          */
  52         private $queueConnectorInstance = NULL;
  53
  54         /**
  55          * Whether this node is anncounced (KEEP ON false!)
  56          * @deprecated
  57          */
  58         private $hubIsAnnounced = false;
  59
  60         /**
  61          * Whether this hub is active (default: false)
  62          */
  63         private $isActive = false;
  64
  65         /**
  66          * Whether this node accepts announcements (default: false)
  67          */
  68         private $acceptAnnouncements = false;
  69
  70         /**
  71          * Protected constructor
  72          *
  73          * @param       $className      Name of the class
  74          * @return      void
  75          */
  76         protected function __construct ($className) {
  77                 // Call parent constructor
  78                 parent::__construct($className);
  79
  80                 // Get a crypto instance
  81                 $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
  82
  83                 // Set it here
  84                 $this->setCryptoInstance($cryptoInstance);
  85
  86                 // Init state which sets the state to 'init'
  87                 $this->initState();
  88         }
  89
  90         /**
  91          * Initializes the node's state which sets it to 'init'
  92          *
  93          * @return      void
  94          */
  95         private function initState() {
  96                 /*
  97                  * Get the state factory and create the initial state, we don't need
  98                  * the state instance here
  99                  */
 100                 NodeStateFactory::createNodeStateInstanceByName('init', $this);
 101         }
 102
 103         /**
 104          * Generates a random string from various data inluding UUID if PECL
 105          * extension uuid is installed.
 106          *
 107          * @param       $length                 Length of the random part
 108          * @return      $randomString   Random string
 109          * @todo        Make this code more generic and move it to CryptoHelper or
 110          */
 111         protected function generateRamdomString ($length) {
 112                 // Get an RNG instance
 113                 $rngInstance = ObjectFactory::createObjectByConfiguredName('rng_class');
 114
 115                 // Generate a pseudo-random string
 116                 $randomString = $rngInstance->randomString($length) . ':' . $this->getBootIpPort() . ':' . $this->getRequestInstance()->getRequestElement('mode');
 117
 118                 // Add UUID for even more entropy for the hasher
 119                 $randomString .= $this->getCryptoInstance()->createUuid();
 120
 121                 // Return it
 122                 return $randomString;
 123         }
 124
 125         /**
 126          * Generates a private key and hashes it (for speeding up things)
 127          *
 128          * @param       $searchInstance         An instance of a LocalSearchCriteria class
 129          * @return void
 130          */
 131         private function generatePrivateKeyAndHash (LocalSearchCriteria $searchInstance) {
 132                 // Generate a pseudo-random string
 133                 $randomString = $this->generateRandomString(255);
 134
 135                 // Hash and encrypt the string so we become a node id (also documented as "hub id")
 136                 $this->setPrivateKey($this->getCryptoInstance()->encryptString($randomString));
 137                 $this->setPrivateKeyHash($this->getCryptoInstance()->hashString($this->getPrivateKey()));
 138
 139                 // Get a wrapper instance
 140                 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
 141
 142                 // Register the node id with our wrapper
 143                 $wrapperInstance->registerPrivateKey($this, $this->getRequestInstance(), $searchInstance);
 144
 145                 // Output message
 146                 self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: Created new private key with hash: ' . $this->getPrivateKeyHash() . '');
 147         }
 148
 149         /**
 150          * Setter for query instance
 151          *
 152          * @param       $connectorInstance              Our new query instance
 153          * @return      void
 154          */
 155         private final function setQueryConnectorInstance (Connectable $connectorInstance) {
 156                 $this->queryConnectorInstance = $connectorInstance;
 157         }
 158
 159         /**
 160          * Getter for query instance
 161          *
 162          * @return      $connectorInstance              Our new query instance
 163          */
 164         public final function getQueryConnectorInstance () {
 165                 return $this->queryConnectorInstance;
 166         }
 167
 168         /**
 169          * Setter for queue instance
 170          *
 171          * @param       $connectorInstance              Our new queue instance
 172          * @return      void
 173          */
 174         private final function setQueueConnectorInstance (Connectable $connectorInstance) {
 175                 $this->queueConnectorInstance = $connectorInstance;
 176         }
 177
 178         /**
 179          * Getter for queue instance
 180          *
 181          * @return      $connectorInstance              Our new queue instance
 182          */
 183         public final function getQueueConnectorInstance () {
 184                 return $this->queueConnectorInstance;
 185         }
 186
 187         /**
 188          * Getter for boot IP/port combination
 189          *
 190          * @return      $bootIpPort             The IP/port combination of the boot node
 191          */
 192         protected final function getBootIpPort () {
 193                 return $this->bootIpPort;
 194         }
 195
 196         /**
 197          * Checks whether the given IP address matches one of the bootstrapping nodes
 198          *
 199          * @param       $remoteAddr             IP address to checkout against our bootstrapping list
 200          * @return      $isFound                Whether the IP is found
 201          */
 202         protected function ifAddressMatchesBootstrappingNodes ($remoteAddr) {
 203                 // By default nothing is found
 204                 $isFound = false;
 205
 206                 // Run through all configured IPs
 207                 foreach (explode(BaseHubSystem::BOOTSTRAP_NODES_SEPARATOR, $this->getConfigInstance()->getConfigEntry('hub_bootstrap_nodes')) as $ipPort) {
 208                         // Split it up in IP/port
 209                         $ipPortArray = explode(':', $ipPort);
 210
 211                         // Does it match?
 212                         if ($ipPortArray[0] == $remoteAddr) {
 213                                 // Found it!
 214                                 $isFound = true;
 215
 216                                 // Remember the port number
 217                                 $this->bootIpPort = $ipPort;
 218
 219                                 // Output message
 220                                 self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: ' . __FUNCTION__ . '[' . __LINE__ . ']: IP matches remote address ' . $ipPort . '.');
 221
 222                                 // Stop further searching
 223                                 break;
 224                         } elseif ($ipPortArray[0] == $this->getConfigInstance()->getConfigEntry('node_listen_addr')) {
 225                                 /*
 226                                  * IP matches listen address. At this point we really don't care
 227                                  * if we can really listen on that address
 228                                  */
 229                                 $isFound = true;
 230
 231                                 // Remember the port number
 232                                 $this->bootIpPort = $ipPort;
 233
 234                                 // Output message
 235                                 self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: ' . __FUNCTION__ . '[' . __LINE__ . ']: IP matches listen address ' . $ipPort . '.');
 236
 237                                 // Stop further searching
 238                                 break;
 239                         }
 240                 } // END - foreach
 241
 242                 // Return the result
 243                 return $isFound;
 244         }
 245
 246         /**
 247          * Outputs the console teaser. This should only be executed on startup or
 248          * full restarts. This method generates some space around the teaser.
 249          *
 250          * @return      void
 251          */
 252         public function outputConsoleTeaser () {
 253                 // Get the app instance (for shortening our code)
 254                 $app = $this->getApplicationInstance();
 255
 256                 // Output all lines
 257                 self::createDebugInstance(__CLASS__)->debugOutput(' ');
 258                 self::createDebugInstance(__CLASS__)->debugOutput($app->getAppName() . ' v' . $app->getAppVersion() . ' - ' . $this->getRequestInstance()->getRequestElement('mode') . ' mode active');
 259                 self::createDebugInstance(__CLASS__)->debugOutput('Copyright (c) 2007 - 2008 Roland Haeder, 2009 - 2012 Hub Developer Team');
 260                 self::createDebugInstance(__CLASS__)->debugOutput(' ');
 261                 self::createDebugInstance(__CLASS__)->debugOutput('This program comes with ABSOLUTELY NO WARRANTY; for details see docs/COPYING.');
 262                 self::createDebugInstance(__CLASS__)->debugOutput('This is free software, and you are welcome to redistribute it under certain');
 263                 self::createDebugInstance(__CLASS__)->debugOutput('conditions; see docs/COPYING for details.');
 264                 self::createDebugInstance(__CLASS__)->debugOutput(' ');
 265         }
 266
 267         /**
 268          * Generic method to acquire a hub-id. On first run this generates a new one
 269          * based on many pseudo-random data. On any later run, unless the id
 270          * got not removed from database, it will be restored from the database.
 271          *
 272          * @param       $requestInstance        A Requestable class
 273          * @param       $responseInstance       A Responseable class
 274          * @return      void
 275          */
 276         public function bootstrapAcquireNodeId (Requestable $requestInstance, Responseable $responseInstance) {
 277                 // Get a wrapper instance
 278                 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
 279
 280                 // Now get a search criteria instance
 281                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
 282
 283                 // Search for the node number one which is hard-coded the default
 284                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
 285                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->getRequestInstance()->getRequestElement('mode'));
 286                 $searchInstance->setLimit(1);
 287
 288                 // Get a result back
 289                 $resultInstance = $wrapperInstance->doSelectByCriteria($searchInstance);
 290
 291                 // Is it valid?
 292                 if ($resultInstance->next()) {
 293                         // Save the result instance in this class
 294                         $this->setResultInstance($resultInstance);
 295
 296                         // Get the node id from result and set it
 297                         $this->setNodeId($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID));
 298
 299                         // Output message
 300                         self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: Re-using found node-id: ' . $this->getNodeId() . '');
 301                 } else {
 302                         // Generate a pseudo-random string
 303                         $randomString = $this->generateRandomString(255);
 304
 305                         // Hash and encrypt the string so we become a node id (also documented as "hub id")
 306                         $this->setNodeId($this->getCryptoInstance()->hashString($this->getCryptoInstance()->encryptString($randomString)));
 307
 308                         // Register the node id with our wrapper
 309                         $wrapperInstance->registerNodeId($this, $this->getRequestInstance());
 310
 311                         // Output message
 312                         self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: Created new node-id: ' . $this->getNodeId() . '');
 313                 }
 314         }
 315
 316         /**
 317          * Generates a session id which will be sent to the other hubs and peers
 318          *
 319          * @return      void
 320          */
 321         public function bootstrapGenerateSessionId () {
 322                 // Now get a search criteria instance
 323                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
 324
 325                 // Search for the node number one which is hard-coded the default
 326                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
 327                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->getRequestInstance()->getRequestElement('mode'));
 328                 $searchInstance->setLimit(1);
 329
 330                 // Get a random string
 331                 $randomString = $this->generateRamdomString(255);
 332
 333                 // Hash and encrypt the string so we become a "node id" aka Hub-Id
 334                 $this->setSessionId($this->getCryptoInstance()->hashString($this->getCryptoInstance()->encryptString($randomString)));
 335
 336                 // Get a wrapper instance
 337                 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
 338
 339                 // Register the node id with our wrapper
 340                 $wrapperInstance->registerSessionId($this, $this->getRequestInstance(), $searchInstance);
 341
 342                 // Output message
 343                 self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: Created new session-id: ' . $this->getSessionId() . '');
 344
 345                 // Change the state because the node has auired a hub id
 346                 $this->getStateInstance()->nodeGeneratedSessionId();
 347         }
 348
 349         /**
 350          * Generate a private key for en-/decryption
 351          *
 352          * @return      void
 353          */
 354         public function bootstrapGeneratePrivateKey () {
 355                 // Get a wrapper instance
 356                 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
 357
 358                 // Now get a search criteria instance
 359                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
 360
 361                 // Search for the node number one which is hard-coded the default
 362                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
 363                 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->getRequestInstance()->getRequestElement('mode'));
 364                 $searchInstance->setLimit(1);
 365
 366                 // Get a result back
 367                 $resultInstance = $wrapperInstance->doSelectByCriteria($searchInstance);
 368
 369                 // Is it valid?
 370                 if ($resultInstance->next()) {
 371                         // Save the result instance in this class
 372                         $this->setResultInstance($resultInstance);
 373
 374                         // Is the element set?
 375                         if (is_null($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_PRIVATE_KEY))) {
 376                                 /*
 377                                  * Auto-generate the private key for e.g. out-dated database
 378                                  * "tables". This allows a smooth update for the underlaying
 379                                  * database table.
 380                                  */
 381                                 $this->generatePrivateKeyAndHash($searchInstance);
 382                         } else {
 383                                 // Get the node id from result and set it
 384                                 $this->setPrivateKey(base64_decode($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_PRIVATE_KEY)));
 385                                 $this->setPrivateKeyHash($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH));
 386
 387                                 // Output message
 388                                 self::createDebugInstance(__CLASS__)->debugOutput('BOOTSTRAP: Re-using found private key hash: ' . $this->getPrivateKeyHash() . '');
 389                         }
 390                 } else {
 391                         /*
 392                          * Generate it in a private method (no confusion with 'private
 393                          * method access' and 'private key' here! ;-)).
 394                          */
 395                         $this->generatePrivateKeyAndHash($searchInstance);
 396                 }
 397         }
 398
 399         /**
 400          * Adds hub data elements to a given dataset instance
 401          *
 402          * @param       $criteriaInstance       An instance of a storeable criteria
 403          * @param       $requestInstance        An instance of a Requestable class
 404          * @return      void
 405          */
 406         public function addElementsToDataSet (StoreableCriteria $criteriaInstance, Requestable $requestInstance) {
 407                 // Add node number and type
 408                 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
 409                 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $requestInstance->getRequestElement('mode'));
 410
 411                 // Add the node id
 412                 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID, $this->getNodeId());
 413
 414                 // Add the session id if acquired
 415                 if ($this->getSessionId() != '') {
 416                         $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_SESSION_ID, $this->getSessionId());
 417                 } // END - if
 418
 419                 // Add the private key if acquired
 420                 if ($this->getPrivateKey() != '') {
 421                         $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_PRIVATE_KEY, base64_encode($this->getPrivateKey()));
 422                         $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH, $this->getPrivateKeyHash());
 423                 } // END - if
 424         }
 425
 426         /**
 427          * Updates a given field with new value
 428          *
 429          * @param       $fieldName              Field to update
 430          * @param       $fieldValue             New value to store
 431          * @return      void
 432          * @throws      DatabaseUpdateSupportException  If this class does not support database updates
 433          * @todo        Try to make this method more generic so we can move it in BaseFrameworkSystem
 434          */
 435         public function updateDatabaseField ($fieldName, $fieldValue) {
 436                 // Unfinished
 437                 $this->partialStub('Unfinished!');
 438                 return;
 439
 440                 // Get a critieria instance
 441                 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
 442
 443                 // Add search criteria
 444                 $searchInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
 445                 $searchInstance->setLimit(1);
 446
 447                 // Now get another criteria
 448                 $updateInstance = ObjectFactory::createObjectByConfiguredName('update_criteria_class');
 449
 450                 // Add criteria entry which we shall update
 451                 $updateInstance->addCriteria($fieldName, $fieldValue);
 452
 453                 // Add the search criteria for searching for the right entry
 454                 $updateInstance->setSearchInstance($searchInstance);
 455
 456                 // Set wrapper class name
 457                 $updateInstance->setWrapperConfigEntry('user_db_wrapper_class');
 458
 459                 // Remember the update in database result
 460                 $this->getResultInstance()->add2UpdateQueue($updateInstance);
 461         }
 462
 463         /**
 464          * Announces this hub to the upper (bootstrap or list) hubs. After this is
 465          * successfully done the given task is unregistered from the handler. This
 466          * might look a bit overloaded here but the announcement phase isn't a
 467          * simple "Hello there" message, it may later on also contain more
 468          * informations like the object list.
 469          *
 470          * @param       $taskInstance   The task instance running this announcement
 471          * @return      void
 472          * @throws      NodeAlreadyAnnouncedException   If this hub is already announced
 473          * @todo        Change the first if() block to check for a specific state
 474          */
 475         public function announceToUpperNodes (Taskable $taskInstance) {
 476                 // Is this hub node announced?
 477                 if ($this->hubIsAnnounced === true) {
 478                         // Already announced!
 479                         throw new NodeAlreadyAnnouncedException($this, self::EXCEPTION_HUB_ALREADY_ANNOUNCED);
 480                 } // END - if
 481
 482                 // Debug output
 483                 self::createDebugInstance(__CLASS__)->debugOutput('HUB-Announcement: START (taskInstance=' . $taskInstance->__toString(). ')');
 484
 485                 // Get a helper instance
 486                 $helperInstance = ObjectFactory::createObjectByConfiguredName('node_announcement_helper_class');
 487
 488                 // Load the announcement descriptor
 489                 $helperInstance->loadDescriptorXml($this);
 490
 491                 // Compile all variables
 492                 $helperInstance->getTemplateInstance()->compileConfigInVariables();
 493
 494                 // "Publish" the descriptor by sending it to the bootstrap/list nodes
 495                 $helperInstance->sendPackage($this);
 496
 497                 // Change the state, this should be the last line except debug output
 498                 $this->getStateInstance()->nodeAnnouncedToUpperHubs();
 499
 500                 // Debug output
 501                 self::createDebugInstance(__CLASS__)->debugOutput('HUB-Announcement: FINISHED');
 502         }
 503
 504         /**
 505          * Does a self-connect attempt on the public IP address. This should make
 506          * it sure, we are reachable from outside world. For this kind of package we
 507          * don't need that overload we have in the announcement phase.
 508          *
 509          * @param       $taskInstance   The task instance running this announcement
 510          * @return      void
 511          */
 512         public function doSelfConnection (Taskable $taskInstance) {
 513                 // Debug output
 514                 self::createDebugInstance(__CLASS__)->debugOutput('HUB: Self Connection: START (taskInstance=' . $taskInstance->__toString(). ')');
 515
 516                 // Get a helper instance
 517                 $helperInstance = ObjectFactory::createObjectByConfiguredName('node_self_connect_helper_class', array($this));
 518
 519                 // Load the descriptor (XML) file
 520                 $helperInstance->loadDescriptorXml($this);
 521
 522                 // Compile all variables
 523                 $helperInstance->getTemplateInstance()->compileConfigInVariables();
 524
 525                 // And send the package away
 526                 $helperInstance->sendPackage($this);
 527
 528                 // Debug output
 529                 self::createDebugInstance(__CLASS__)->debugOutput('HUB: Self Connection: FINISHED');
 530         }
 531
 532         /**
 533          * Activates the hub by doing some final preparation and setting
 534          * $hubIsActive to true
 535          *
 536          * @param       $requestInstance        A Requestable class
 537          * @param       $responseInstance       A Responseable class
 538          * @return      void
 539          */
 540         public function activateNode (Requestable $requestInstance, Responseable $responseInstance) {
 541                 // Checks whether a listener is still active and shuts it down if one
 542                 // is still listening.
 543                 if (($this->determineIfListenerIsActive()) && ($this->isNodeActive())) {
 544                         // Shutdown them down before they can hurt anything
 545                         $this->shutdownListenerPool();
 546                 } // END - if
 547
 548                 // Get the controller here
 549                 $controllerInstance = Registry::getRegistry()->getInstance('controller');
 550
 551                 // Run all filters for the hub activation
 552                 $controllerInstance->executeActivationFilters($requestInstance, $responseInstance);
 553
 554                 // ----------------------- Last step from here ------------------------
 555                 // Activate the hub. This is ALWAYS the last step in this method
 556                 $this->getStateInstance()->nodeIsActivated();
 557                 // ---------------------- Last step until here ------------------------
 558         }
 559
 560         /**
 561          * Initializes the listener pool (class)
 562          *
 563          * @return      void
 564          */
 565         public function initializeListenerPool () {
 566                 // Debug output
 567                 self::createDebugInstance(__CLASS__)->debugOutput('HUB: Initialize listener: START');
 568
 569                 // Get a new pool instance
 570                 $this->setListenerPoolInstance(ObjectFactory::createObjectByConfiguredName('listener_pool_class', array($this)));
 571
 572                 // Get an instance of the low-level listener
 573                 $listenerInstance = ObjectFactory::createObjectByConfiguredName('tcp_listener_class', array($this));
 574
 575                 // Setup address and port
 576                 $listenerInstance->setListenAddressByConfiguration('node_listen_addr');
 577
 578                 /*
 579                  * All nodes can now use the same configuration entry because it can be
 580                  * customized in config-local.php.
 581                  */
 582                 $listenerInstance->setListenPortByConfiguration('node_tcp_listen_port');
 583
 584                 // Initialize the listener
 585                 $listenerInstance->initListener();
 586
 587                 // Get a decorator class
 588                 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('node_tcp_listener_class', array($listenerInstance));
 589
 590                 // Add this listener to the pool
 591                 $this->getListenerPoolInstance()->addListener($decoratorInstance);
 592
 593                 // Get a decorator class
 594                 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('client_tcp_listener_class', array($listenerInstance));
 595
 596                 // Add this listener to the pool
 597                 $this->getListenerPoolInstance()->addListener($decoratorInstance);
 598
 599                 // Get an instance of the low-level listener
 600                 $listenerInstance = ObjectFactory::createObjectByConfiguredName('udp_listener_class', array($this));
 601
 602                 // Setup address and port
 603                 $listenerInstance->setListenAddressByConfiguration('node_listen_addr');
 604
 605                 /*
 606                  * All nodes can now use the same configuration entry because it can be
 607                  * customized in config-local.php.
 608                  */
 609                 $listenerInstance->setListenPortByConfiguration('node_udp_listen_port');
 610
 611                 // Initialize the listener
 612                 $listenerInstance->initListener();
 613
 614                 // Get a decorator class
 615                 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('node_udp_listener_class', array($listenerInstance));
 616
 617                 // Add this listener to the pool
 618                 $this->getListenerPoolInstance()->addListener($decoratorInstance);
 619
 620                 // Get a decorator class
 621                 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('client_udp_listener_class', array($listenerInstance));
 622
 623                 // Add this listener to the pool
 624                 $this->getListenerPoolInstance()->addListener($decoratorInstance);
 625
 626                 // Debug output
 627                 self::createDebugInstance(__CLASS__)->debugOutput('HUB: Initialize listener: FINISHED.');
 628         }
 629
 630         /**
 631          * Getter for isActive attribute
 632          *
 633          * @return      $isActive       Whether the hub is active
 634          */
 635         public final function isNodeActive () {
 636                 return $this->isActive;
 637         }
 638
 639         /**
 640          * Enables (default) or disables isActive flag
 641          *
 642          * @param       $isActive       Whether the hub is active
 643          * @return      void
 644          */
 645         public final function enableIsActive ($isActive = true) {
 646                 $this->isActive = (bool) $isActive;
 647         }
 648
 649         /**
 650          * Checks whether this node accepts announcements
 651          *
 652          * @return      $acceptAnnouncements    Whether this node accepts announcements
 653          */
 654         public final function isAcceptingAnnouncements () {
 655                 // Check it (this node must be active and not shutdown!)
 656                 $acceptAnnouncements = (($this->acceptAnnouncements === true) && ($this->isNodeActive()));
 657
 658                 // Return it
 659                 return $acceptAnnouncements;
 660         }
 661
 662         /**
 663          * Checks whether this node has attempted to announce itself
 664          *
 665          * @return      $hasAnnounced   Whether this node has attempted to announce itself
 666          * @todo        Add checking if this node has been announced to the sender node
 667          */
 668         public function ifNodeHasAnnounced () {
 669                 // Debug message
 670                 /* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NODE: ifNodeHasAnnounced(): state=' . $this->getStateInstance()->getStateName());
 671
 672                 // Simply check the state of this node
 673                 $hasAnnounced = ($this->getStateInstance() instanceof NodeAnnouncedState);
 674
 675                 // Debug message
 676                 /* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NODE: ifNodeHasAnnounced(): hasAnnounced=' . intval($hasAnnounced));
 677
 678                 // Return it
 679                 return $hasAnnounced;
 680         }
 681
 682         /**
 683          * Checks whether this node has attempted to announce itself and completed it
 684          *
 685          * @return      $hasAnnouncementCompleted       Whether this node has attempted to announce itself and completed it
 686          * @todo        Add checking if this node has been announced to the sender node
 687          */
 688         public function ifNodeHasAnnouncementCompleted () {
 689                 // Debug message
 690                 /* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NODE: ifNodeHasAnnouncementCompleted(): state=' . $this->getStateInstance()->getStateName());
 691
 692                 // Simply check the state of this node
 693                 $hasAnnouncementCompleted = ($this->getStateInstance() instanceof NodeAnnouncementCompletedState);
 694
 695                 // Debug message
 696                 /* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NODE: ifNodeHasAnnouncementCompleted(): hasAnnouncementCompleted=' . intval($hasAnnouncementCompleted));
 697
 698                 // Return it
 699                 return $hasAnnouncementCompleted;
 700         }
 701
 702         /**
 703          * Enables whether this node accepts announcements
 704          *
 705          * @param       $acceptAnnouncements    Whether this node accepts announcements (default: true)
 706          * @return      void
 707          */
 708         protected final function enableAcceptingAnnouncements ($acceptAnnouncements = true) {
 709                 $this->acceptAnnouncements = $acceptAnnouncements;
 710         }
 711
 712         /**
 713          * Checks wether this node is accepting node-list requests
 714          *
 715          * @return      $acceptsRequest         Wether this node accepts node-list requests
 716          */
 717         public function isAcceptingNodeListRequests () {
 718                 /*
 719                  * Only 'regular' nodes does not accept such requests, checking
 720                  * HubRegularNode is faster, but if e.g. HubRegularI2PNode will be
 721                  * added then the next check will be true.
 722                  */
 723                 $acceptsRequest = ((!$this instanceof HubRegularNode) && ($this->getRequestInstance()->getRequestElement('mode') != self::NODE_TYPE_REGULAR));
 724
 725                 // Return it
 726                 return $acceptsRequest;
 727         }
 728
 729         /**
 730          * "Getter" for address:port combination
 731          *
 732          * @param       $handlerInstance        An instance of a Networkable class
 733          * @return      $addressPort            A address:port combination for this node
 734          */
 735         public final function getAddressPort (Networkable $handlerInstance) {
 736                 // Construct config entry
 737                 $configEntry = 'node_' . $handlerInstance->getHandlerName() . '_listen_port';
 738
 739                 // Get IP and port
 740                 $addressPort = $this->getConfigInstance()->detectServerAddress() . ':' . $this->getConfigInstance()->getConfigEntry($configEntry);
 741
 742                 // Return it
 743                 return $addressPort;
 744         }
 745
 746         /**
 747          * Updates/refreshes node data (e.g. status).
 748          *
 749          * @return      void
 750          * @todo        Find more to do here
 751          */
 752         public function updateNodeData () {
 753                 // Set some dummy configuration entries, e.g. node_status
 754                 $this->getConfigInstance()->setConfigEntry('node_status', $this->getStateInstance()->getStateName());
 755         }
 756
 757         /**
 758          * Handles message answer by given data array
 759          *
 760          * @param       $messageData            A valid answer message data array
 761          * @param       $packageInstance        An instance of a Receivable class
 762          * @return      void
 763          * @todo        Handle thrown exception
 764          */
 765         public function handleAnswerStatusByMessageData (array $messageData, Receivable $packageInstance) {
 766                 // Is it not empty?
 767                 assert(!empty($messageData[BaseXmlAnswerTemplateEngine::ANSWER_STATUS]));
 768
 769                 // Construct configuration entry for handling class' name
 770                 $classConfigEntry = strtolower($messageData[NetworkPackage::MESSAGE_ARRAY_TYPE] . '_status_' . $messageData[BaseXmlAnswerTemplateEngine::ANSWER_STATUS]) . '_handler_class';
 771
 772                 // Try to get a class
 773                 $handlerInstance = ObjectFactory::createObjectByConfiguredName($classConfigEntry);
 774
 775                 // Handle it there
 776                 $handlerInstance->handleAnswerMessageData($messageData, $packageInstance);
 777         }
 778
 779         /**
 780          * "Getter" for an array of all accepted object types
 781          *
 782          * @return      $objectList             Array of all accepted object types
 783          */
 784         public function getListFromAcceptedObjectTypes () {
 785                 // Get registry instance
 786                 $objectRegistryInstance = ObjectTypeRegistryFactory::createObjectTypeRegistryInstance();
 787
 788                 // Get all entries
 789                 $objectList = $objectRegistryInstance->getEntries(XmlObjectRegistryTemplateEngine::OBJECT_TYPE_DATA_NAME);
 790
 791                 // ... and return it
 792                 return $objectList;
 793         }
 794 }
 795
 796 // [EOF]
 797 ?>