X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=inc%2Fmain%2Fclasses%2Flistener%2Fclass_BaseListener.php;fp=inc%2Fmain%2Fclasses%2Flistener%2Fclass_BaseListener.php;h=5b17e79607e5c36c319ba204873dbac15fa576f9;hb=cad1ab5ecb2935a6ebf678555860c3bd96b525b0;hp=0000000000000000000000000000000000000000;hpb=1daff5a94de037022058d8760a06bd869de67630;p=core.git diff --git a/inc/main/classes/listener/class_BaseListener.php b/inc/main/classes/listener/class_BaseListener.php new file mode 100644 index 00000000..5b17e796 --- /dev/null +++ b/inc/main/classes/listener/class_BaseListener.php @@ -0,0 +1,597 @@ + + * @version 0.0.0 + * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2016 Core Developer Team + * @license GNU GPL 3.0 or any newer version + * @link http://www.shipsimu.org + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +class BaseListener extends BaseFrameworkSystem implements Visitable { + // Exception code constants + const EXCEPTION_INVALID_SOCKET = 0xa00; + const EXCEPTION_SOCKET_ALREADY_REGISTERED = 0xa01; + const EXCEPTION_SOCKET_CREATION_FAILED = 0xa02; + const EXCEPTION_NO_SOCKET_ERROR = 0xa03; + const EXCEPTION_CONNECTION_ALREADY_REGISTERED = 0xa04; + const EXCEPTION_UNEXPECTED_PACKAGE_STATUS = 0xa05; + const EXCEPTION_UNSUPPORTED_PACKAGE_CODE_HANDLER = 0xa06; + const EXCEPTION_FINAL_CHUNK_VERIFICATION = 0xa07; + const EXCEPTION_INVALID_DATA_CHECKSUM = 0xa08; + + /** + * Address (IP mostly) we shall listen on + */ + private $listenAddress = '0.0.0.0'; // This is the default and listens on all interfaces + + /** + * Port we shall listen on (or wait for incoming data) + */ + private $listenPort = 0; // This port MUST be changed by your application + + /** + * Whether we are in blocking or non-blocking mode (default: non-blocking + */ + private $blockingMode = FALSE; + + /** + * A peer pool instance + */ + private $poolInstance = NULL; + + /** + * Protected constructor + * + * @param $className Name of the class + * @return void + */ + protected function __construct ($className) { + // Call parent constructor + parent::__construct($className); + } + + /** + * Checks whether the given socket resource is a server socket + * + * @param $socketResource A valid socket resource + * @return $isServerSocket Whether the socket resource is a server socket + */ + protected function isServerSocketResource ($socketResource) { + // Check it + $isServerSocket = ((is_resource($socketResource)) && (!@socket_getpeername($socketResource, $peerName))); + + // We need to clear the error here if it is a resource + if ($isServerSocket === TRUE) { + // Clear the error + //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('socketResource[]=' . gettype($socketResource)); + socket_clear_error($socketResource); + } // END - if + + // Check peer name, it must be empty + $isServerSocket = (($isServerSocket) && (empty($peerName))); + + // Return result + return $isServerSocket; + } + + /** + * Setter for listen address + * + * @param $listenAddress The address this listener should listen on + * @return void + */ + protected final function setListenAddress ($listenAddress) { + $this->listenAddress = (string) $listenAddress; + } + + /** + * Getter for listen address + * + * @return $listenAddress The address this listener should listen on + */ + public final function getListenAddress () { + return $this->listenAddress; + } + + /** + * Setter for listen port + * + * @param $listenPort The port this listener should listen on + * @return void + */ + protected final function setListenPort ($listenPort) { + $this->listenPort = (int) $listenPort; + } + + /** + * Getter for listen port + * + * @return $listenPort The port this listener should listen on + */ + public final function getListenPort () { + return $this->listenPort; + } + + /** + * "Setter" to set listen address from configuration entry + * + * @param $configEntry The configuration entry holding our listen address + * @return void + */ + public final function setListenAddressByConfiguration ($configEntry) { + $this->setListenAddress($this->getConfigInstance()->getConfigEntry($configEntry)); + } + + /** + * "Setter" to set listen port from configuration entry + * + * @param $configEntry The configuration entry holding our listen port + * @return void + */ + public final function setListenPortByConfiguration ($configEntry) { + $this->setListenPort($this->getConfigInstance()->getConfigEntry($configEntry)); + } + + /** + * Setter for blocking-mode + * + * @param $blockingMode Whether blocking-mode is disabled (default) or enabled + * @return void + */ + protected final function setBlockingMode ($blockingMode) { + $this->blockingMode = (boolean) $blockingMode; + } + + /** + * Checks whether blocking-mode is enabled or disabled + * + * @return $blockingMode Whether blocking mode is disabled or enabled + */ + public final function isBlockingModeEnabled () { + return $this->blockingMode; + } + + /** + * Setter for peer pool instance + * + * @param $poolInstance The peer pool instance we shall set + * @return void + */ + protected final function setPoolInstance (PoolablePeer $poolInstance) { + $this->poolInstance = $poolInstance; + } + + /** + * Getter for peer pool instance + * + * @return $poolInstance The peer pool instance we shall set + */ + public final function getPoolInstance () { + return $this->poolInstance; + } + + /** + * Getter for connection type + * + * @return $connectionType Connection type for this listener + */ + public final function getConnectionType () { + // Wrap the real getter + return $this->getProtocolName(); + } + + /** + * Registeres the given socket resource for "this" listener instance. This + * will be done in a seperate class to allow package writers to use it + * again. + * + * @param $socketResource A valid server socket resource + * @return void + * @throws InvalidServerSocketException If the given resource is no server socket + * @throws SocketAlreadyRegisteredException If the given resource is already registered + */ + protected function registerServerSocketResource ($socketResource) { + // First check if it is valid + if (!$this->isServerSocketResource($socketResource)) { + // No server socket + throw new InvalidServerSocketException(array($this, $socketResource), self::EXCEPTION_INVALID_SOCKET); + } elseif ($this->isServerSocketRegistered($socketResource)) { + // Already registered + throw new SocketAlreadyRegisteredException($this, self::EXCEPTION_SOCKET_ALREADY_REGISTERED); + } + + // Get a socket registry instance (singleton) + $registryInstance = SocketRegistryFactory::createSocketRegistryInstance(); + + // Get a connection info instance + $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($this->getProtocolName(), 'listener'); + + // Will the info instance with listener data + $infoInstance->fillWithListenerInformation($this); + + // Register the socket + $registryInstance->registerSocket($infoInstance, $socketResource); + + // And set it here + $this->setSocketResource($socketResource); + } + + /** + * Checks whether given socket resource is registered in socket registry + * + * @param $socketResource A valid server socket resource + * @return $isRegistered Whether given server socket is registered + */ + protected function isServerSocketRegistered ($socketResource) { + // Get a socket registry instance (singleton) + $registryInstance = SocketRegistryFactory::createSocketRegistryInstance(); + + // Get a connection info instance + $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($this->getProtocolName(), 'listener'); + + // Will the info instance with listener data + $infoInstance->fillWithListenerInformation($this); + + // Check it + $isRegistered = $registryInstance->isSocketRegistered($infoInstance, $socketResource); + + // Return result + return $isRegistered; + } + + /** + * Accepts the visitor to process the visit "request" + * + * @param $visitorInstance An instance of a Visitor class + * @return void + */ + public function accept (Visitor $visitorInstance) { + // Debug message + //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(strtoupper($this->getProtocolName()) . '-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - CALLED!'); + + // Visit this listener + $visitorInstance->visitListener($this); + + // Visit the pool if set + if ($this->getPoolInstance() instanceof Poolable) { + $this->getPoolInstance()->accept($visitorInstance); + } // END - if + + // Debug message + //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(strtoupper($this->getProtocolName()) . '-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - EXIT!'); + } + + /** + * Monitors incoming raw data from the handler and transfers it to the + * given receiver instance. This method should not be called, please call + * the decorator's version instead to separator node/client traffic. + * + * @return void + * @throws UnsupportedOperatorException If this method is called by a mistake + */ + public function monitorIncomingRawData () { + throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION); + } + + /** + * Constructs a callable method name from given socket error code. If the + * method is not found, a generic one is used. + * + * @param $errorCode Error code from socket_last_error() + * @return $handlerName Call-back method name for the error handler + * @throws UnsupportedSocketErrorHandlerException If the error handler is not implemented + */ + protected function getSocketErrorHandlerFromCode ($errorCode) { + // Create a name from translated error code + $handlerName = 'socketError' . self::convertToClassName($this->translateSocketErrorCodeToName($errorCode)) . 'Handler'; + + // Is the call-back method there? + if (!method_exists($this, $handlerName)) { + // Please implement this + throw new UnsupportedSocketErrorHandlerException(array($this, $handlerName, $errorCode), BaseConnectionHelper::EXCEPTION_UNSUPPORTED_ERROR_HANDLER); + } // END - if + + // Return it + return $handlerName; + } + + /** + * Translates socket error codes into our own internal names which can be + * used for call-backs. + * + * @param $errorCode The error code from socket_last_error() to be translated + * @return $errorName The translated name (all lower-case, with underlines) + */ + public function translateSocketErrorCodeToName ($errorCode) { + // Nothing bad happened by default + $errorName = BaseRawDataHandler::SOCKET_CONNECTED; + + // Is the code a number, then we have to change it + switch ($errorCode) { + case 0: // Silently ignored, the socket is connected + break; + + case 11: // "Resource temporary unavailable" + $errorName = BaseRawDataHandler::SOCKET_ERROR_RESOURCE_UNAVAILABLE; + break; + + case 13: // "Permission denied" + $errorName = BaseRawDataHandler::SOCKET_ERROR_PERMISSION_DENIED; + break; + + case 32: // "Broken pipe" + $errorName = BaseRawDataHandler::SOCKET_ERROR_BROKEN_PIPE; + break; + + case 104: // "Connection reset by peer" + $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_RESET_BY_PEER; + break; + + case 107: // "Transport end-point not connected" + case 134: // On some (?) systems for 'transport end-point not connected' + // @TODO On some systems it is 134, on some 107? + $errorName = BaseRawDataHandler::SOCKET_ERROR_TRANSPORT_ENDPOINT; + break; + + case 110: // "Connection timed out" + $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_TIMED_OUT; + break; + + case 111: // "Connection refused" + $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_REFUSED; + break; + + case 113: // "No route to host" + $errorName = BaseRawDataHandler::SOCKET_ERROR_NO_ROUTE_TO_HOST; + break; + + case 114: // "Operation already in progress" + $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_ALREADY_PROGRESS; + break; + + case 115: // "Operation now in progress" + $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_IN_PROGRESS; + break; + + default: // Everything else <> 0 + // Unhandled error code detected, so first debug it because we may want to handle it like the others + self::createDebugInstance(__CLASS__)->debugOutput('BASE-HUB[' . __METHOD__ . ':' . __LINE__ . '] UNKNOWN ERROR CODE = ' . $errorCode . ', MESSAGE = ' . socket_strerror($errorCode)); + + // Change it only in this class + $errorName = BaseRawDataHandler::SOCKET_ERROR_UNKNOWN; + break; + } + + // Return translated name + return $errorName; + } + + /** + * Shuts down a given socket resource. This method does only ease calling + * the right visitor. + * + * @param $socketResource A valid socket resource + * @return void + */ + public function shutdownSocket ($socketResource) { + // Debug message + self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM: Shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...'); + + // Set socket resource + $this->setSocketResource($socketResource); + + // Get a visitor instance + $visitorInstance = ObjectFactory::createObjectByConfiguredName('shutdown_socket_visitor_class'); + + // Debug output + self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString()); + + // Call the visitor + $this->accept($visitorInstance); + } + + /** + * Half-shuts down a given socket resource. This method does only ease calling + * an other visitor than shutdownSocket() does. + * + * @param $socketResource A valid socket resource + * @return void + */ + public function halfShutdownSocket ($socketResource) { + // Debug message + self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM: Half-shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...'); + + // Set socket resource + $this->setSocketResource($socketResource); + + // Get a visitor instance + $visitorInstance = ObjectFactory::createObjectByConfiguredName('half_shutdown_socket_visitor_class'); + + // Debug output + self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString()); + + // Call the visitor + $this->accept($visitorInstance); + } + + // ************************************************************************ + // Socket error handler call-back methods + // ************************************************************************ + + /** + * Handles socket error 'permission denied', but does not clear it for + * later debugging purposes. + * + * @param $socketResource A valid socket resource + * @param $socketData A valid socket data array (0 = IP/file name, 1 = port) + * @return void + * @throws SocketBindingException The socket could not be bind to + */ + protected function socketErrorPermissionDeniedHandler ($socketResource, array $socketData) { + // Get socket error code for verification + $socketError = socket_last_error($socketResource); + + // Get error message + $errorMessage = socket_strerror($socketError); + + // Shutdown this socket + $this->shutdownSocket($socketResource); + + // Throw it again + throw new SocketBindingException(array($this, $socketData, $socketResource, $socketError, $errorMessage), BaseListener::EXCEPTION_INVALID_SOCKET); + } + + /** + * "Listens" for incoming network packages + * + * @param $peerSuffix Suffix for peer name (e.g. :0 for TCP(/UDP?) connections) + * @return void + * @throws InvalidSocketException If an invalid socket resource has been found + */ + protected function doListenSocketSelect ($peerSuffix) { + // Check on all instances + assert($this->getPoolInstance() instanceof Poolable); + assert(is_resource($this->getSocketResource())); + + // Get all readers + $readers = $this->getPoolInstance()->getAllSingleSockets(); + $writers = array(); + $excepts = array(); + + // Check if we have some peers left + $left = socket_select( + $readers, + $writers, + $excepts, + 0, + 150 + ); + + // Some new peers found? + if ($left < 1) { + // Debug message + //* EXTREME-NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: left=' . $left . ',serverSocket=' . $this->getSocketResource() . ',readers=' . print_r($readers, TRUE)); + + // Nothing new found + return; + } // END - if + + // Debug message + //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: serverSocket=' . $this->getSocketResource() . ',readers=' . print_r($readers, TRUE)); + + // Do we have changed peers? + if (in_array($this->getSocketResource(), $readers)) { + /* + * Then accept it, if this socket is set to non-blocking IO and the + * connection is NOT sending any data, socket_read() may throw + * error 11 (Resource temporary unavailable). This really nasty + * because if you have blocking IO socket_read() will wait and wait + * and wait ... + */ + $newSocket = socket_accept($this->getSocketResource()); + + // Debug message + //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: newSocket=' . $newSocket . ',serverSocket=' .$this->getSocketResource()); + + // Array for timeout settings + $options = array( + // Seconds + 'sec' => $this->getConfigInstance()->getConfigEntry('tcp_socket_accept_wait_sec'), + // Milliseconds + 'usec' => $this->getConfigInstance()->getConfigEntry('tcp_socket_accept_wait_usec') + ); + + // Set timeout to configured seconds + // @TODO Does this work on Windozer boxes??? + if (!socket_set_option($newSocket, SOL_SOCKET, SO_RCVTIMEO, $options)) { + // Handle this socket error with a faked recipientData array + $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0')); + } // END - if + + // Output result (only for debugging!) + /* + $option = socket_get_option($newSocket, SOL_SOCKET, SO_RCVTIMEO); + self::createDebugInstance(__CLASS__)->debugOutput('SO_RCVTIMEO[' . gettype($option) . ']=' . print_r($option, TRUE)); + */ + + // Enable SO_OOBINLINE + if (!socket_set_option($newSocket, SOL_SOCKET, SO_OOBINLINE ,1)) { + // Handle this socket error with a faked recipientData array + $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0')); + } // END - if + + // Set non-blocking + if (!socket_set_nonblock($newSocket)) { + // Handle this socket error with a faked recipientData array + $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0')); + } // END - if + + // Add it to the peers + $this->getPoolInstance()->addPeer($newSocket, BaseConnectionHelper::CONNECTION_TYPE_INCOMING); + + // Get peer name + if (!socket_getpeername($newSocket, $peerName)) { + // Handle this socket error with a faked recipientData array + $this->handleSocketError(__METHOD__, __LINE__, $newSocket, array('0.0.0.0', '0')); + } // END - if + + // Get node instance + $nodeInstance = NodeObjectFactory::createNodeInstance(); + + // Create a faked package data array + $packageData = array( + NetworkPackage::PACKAGE_DATA_SENDER => $peerName . $peerSuffix, + NetworkPackage::PACKAGE_DATA_RECIPIENT => $nodeInstance->getSessionId(), + NetworkPackage::PACKAGE_DATA_STATUS => NetworkPackage::PACKAGE_STATUS_FAKED + ); + + // Get a connection info instance + $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($this->getProtocolName(), 'listener'); + + // Will the info instance with listener data + $infoInstance->fillWithListenerInformation($this); + + // Get a socket registry + $registryInstance = SocketRegistryFactory::createSocketRegistryInstance(); + + // Register the socket with the registry and with the faked array + $registryInstance->registerSocket($infoInstance, $newSocket, $packageData); + } // END - if + + // Do we have to rewind? + if (!$this->getIteratorInstance()->valid()) { + // Rewind the list + $this->getIteratorInstance()->rewind(); + } // END - if + + // Get the current value + $currentSocket = $this->getIteratorInstance()->current(); + + // Handle it here, if not main server socket + //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('TCP-LISTENER[' . __METHOD__ . ':' . __LINE__ . ']: currentSocket=' . $currentSocket[BasePool::SOCKET_ARRAY_RESOURCE] . ',type=' . $currentSocket[BasePool::SOCKET_ARRAY_CONN_TYPE] . ',serverSocket=' . $this->getSocketResource()); + if (($currentSocket[BasePool::SOCKET_ARRAY_CONN_TYPE] != BaseConnectionHelper::CONNECTION_TYPE_SERVER) && ($currentSocket[BasePool::SOCKET_ARRAY_RESOURCE] != $this->getSocketResource())) { + // ... or else it will raise warnings like 'Transport endpoint is not connected' + $this->getHandlerInstance()->processRawDataFromResource($currentSocket); + } // END - if + + // Advance to next entry. This should be the last line. + $this->getIteratorInstance()->next(); + } +} + +// [EOF] +?>