*
* @author Roland Haeder <webmaster@ship-simu.org>
* @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2011 Hub Developer Team
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub Developer Team
* @license GNU GPL 3.0 or any newer version
* @link http://www.ship-simu.org
* @todo Needs to add functionality for handling the object's type
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receivable, Registerable, Visitable {
+class NetworkPackage extends BaseHubSystem implements Deliverable, Receivable, Registerable, Visitable {
/**
* Package mask for compressing package data:
* 0: Compressor extension
const PACKAGE_MASK_SEPARATOR = '^';
/**
- * SEPARATOR for checksum
+ * Size of an array created by invoking
+ * explode(NetworkPackage::PACKAGE_MASK_SEPARATOR, $content).
+ */
+ const PACKAGE_CONTENT_ARRAY_SIZE = 4;
+
+ /**
+ * Separator for checksum
*/
const PACKAGE_CHECKSUM_SEPARATOR = '_';
const INDEX_PACKAGE_RECIPIENT = 1;
const INDEX_PACKAGE_CONTENT = 2;
const INDEX_PACKAGE_STATUS = 3;
+ const INDEX_PACKAGE_SIGNATURE = 4;
+
+ /**
+ * Size of the decoded data array ('status' is not included)
+ */
+ const DECODED_DATA_ARRAY_SIZE = 4;
+
+ /**
+ * Named array elements for decoded package content
+ */
+ const PACKAGE_CONTENT_EXTENSION = 'compressor';
+ const PACKAGE_CONTENT_MESSAGE = 'message';
+ const PACKAGE_CONTENT_TAGS = 'tags';
+ const PACKAGE_CONTENT_CHECKSUM = 'checksum';
/**
* Named array elements for package data
*/
const PACKAGE_DATA_SENDER = 'sender';
const PACKAGE_DATA_RECIPIENT = 'recipient';
+ const PACKAGE_DATA_PROTOCOL = 'protocol';
const PACKAGE_DATA_CONTENT = 'content';
const PACKAGE_DATA_STATUS = 'status';
+ const PACKAGE_DATA_SIGNATURE = 'signature';
/**
* All package status
*/
const PACKAGE_STATUS_NEW = 'new';
const PACKAGE_STATUS_FAILED = 'failed';
+ const PACKAGE_STATUS_DECODED = 'decoded';
+ const PACKAGE_STATUS_FAKED = 'faked';
+
+ /**
+ * Constants for message data array
+ */
+ const MESSAGE_ARRAY_DATA = 'message_data';
+ const MESSAGE_ARRAY_TYPE = 'message_type';
/**
- * Tags SEPARATOR
+ * Generic answer status field
+ */
+
+ /**
+ * Tags separator
*/
const PACKAGE_TAGS_SEPARATOR = ';';
/**
- * Raw package data SEPARATOR
+ * Raw package data separator
*/
const PACKAGE_DATA_SEPARATOR = '#';
/**
- * Network target (alias): 'upper hubs'
+ * Separator for more than one recipient
+ */
+ const PACKAGE_RECIPIENT_SEPARATOR = ':';
+
+ /**
+ * Network target (alias): 'upper nodes'
*/
- const NETWORK_TARGET_UPPER_HUBS = 'upper';
+ const NETWORK_TARGET_UPPER = 'upper';
/**
* Network target (alias): 'self'
*/
const NETWORK_TARGET_SELF = 'self';
+ /**
+ * Network target (alias): 'dht'
+ */
+ const NETWORK_TARGET_DHT = 'dht';
+
/**
* TCP package size in bytes
*/
*/
const STACKER_NAME_DECODED_CHUNKED = 'package_chunked_decoded';
+ /**************************************************************************
+ * Stacker for incoming messages *
+ **************************************************************************/
+
+ /**
+ * Stacker name for new messages
+ */
+ const STACKER_NAME_NEW_MESSAGE = 'package_new_message';
+
+ /**
+ * Stacker name for processed messages
+ */
+ const STACKER_NAME_PROCESSED_MESSAGE = 'package_processed_message';
+
/**************************************************************************
* Stacker for other/internal purposes *
**************************************************************************/
*/
const STACKER_NAME_BACK_BUFFER = 'package_backbuffer';
+ /**************************************************************************
+ * Protocol names *
+ **************************************************************************/
+ const PROTOCOL_TCP = 'TCP';
+ const PROTOCOL_UDP = 'UDP';
+
/**
* Protected constructor
*
// Init all stacker
$packageInstance->initStackers();
- // Get a visitor instance for speeding up things
+ // Get a visitor instance for speeding up things and set it
$visitorInstance = ObjectFactory::createObjectByConfiguredName('node_raw_data_monitor_visitor_class', array($packageInstance));
-
- // Set it in this package
$packageInstance->setVisitorInstance($visitorInstance);
+ // Get crypto instance and set it, too
+ $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
+ $packageInstance->setCryptoInstance($cryptoInstance);
+
+ // Get a singleton package assembler instance from factory and set it here, too
+ $assemblerInstance = PackageAssemblerFactory::createAssemblerInstance($packageInstance);
+ $packageInstance->setAssemblerInstance($assemblerInstance);
+
// Return the prepared instance
return $packageInstance;
}
* @param $forceReInit Whether to force reinitialization of all stacks
* @return void
*/
- protected function initStackers ($forceReInit = false) {
+ protected function initStackers ($forceReInit = FALSE) {
// Initialize all
foreach (
array(
self::STACKER_NAME_DECODED_INCOMING,
self::STACKER_NAME_DECODED_HANDLED,
self::STACKER_NAME_DECODED_CHUNKED,
+ self::STACKER_NAME_NEW_MESSAGE,
+ self::STACKER_NAME_PROCESSED_MESSAGE,
self::STACKER_NAME_BACK_BUFFER
) as $stackerName) {
// Init this stacker
+ //* DEBUG: */ print(__METHOD__ . ': stackerName=' . $stackerName . ',forceReInit=' . intval($forceReInit) . PHP_EOL);
$this->getStackerInstance()->initStacker($stackerName, $forceReInit);
} // END - foreach
}
/**
- * "Getter" for hash from given content and helper instance
+ * "Getter" for hash from given content
*
- * @param $content Raw package content
- * @param $helperInstance An instance of a HelpableHub class
- * @param $nodeInstance An instance of a NodeHelper class
- * @return $hash Hash for given package content
- * @todo $helperInstance is unused
+ * @param $content Raw package content
+ * @return $hash Hash for given package content
*/
- private function getHashFromContent ($content, HelpableHub $helperInstance, NodeHelper $nodeInstance) {
+ private function getHashFromContent ($content) {
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
+
// Create the hash
// @TODO crc32() is very weak, but it needs to be fast
$hash = crc32(
$content .
self::PACKAGE_CHECKSUM_SEPARATOR .
- $nodeInstance->getSessionId() .
+ $this->getSessionId() .
self::PACKAGE_CHECKSUM_SEPARATOR .
$this->getCompressorInstance()->getCompressorExtension()
);
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',hash=' . $hash . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
+
// And return it
return $hash;
}
+ /**
+ * Checks whether the checksum (sometimes called "hash") is the same
+ *
+ * @param $decodedContent Package raw content
+ * @param $decodedData Whole raw package data array
+ * @return $isChecksumValid Whether the checksum is the same
+ */
+ private function isChecksumValid (array $decodedContent, array $decodedData) {
+ // Get checksum
+ $checksum = $this->getHashFromContentSessionId($decodedContent, $decodedData[self::PACKAGE_DATA_SENDER]);
+
+ // Is it the same?
+ $isChecksumValid = ($checksum == $decodedContent[self::PACKAGE_CONTENT_CHECKSUM]);
+
+ // Return it
+ return $isChecksumValid;
+ }
+
/**
* Change the package with given status in given stack
*
} // END - if
// Pop the entry (it should be it)
- $this->getStackerInstance()->popNamed($stackerName);
+ $nextData = $this->getStackerInstance()->popNamed($stackerName);
+
+ // Compare both signatures
+ assert($nextData[self::PACKAGE_DATA_SIGNATURE] == $packageData[self::PACKAGE_DATA_SIGNATURE]);
// Temporary set the new status
$packageData[self::PACKAGE_DATA_STATUS] = $newStatus;
$this->getStackerInstance()->pushNamed($stackerName, $packageData);
}
+ /**
+ * "Getter" for hash from given content and sender's session id
+ *
+ * @param $decodedContent Raw package content
+ * @param $sessionId Session id of the sender
+ * @return $hash Hash for given package content
+ */
+ public function getHashFromContentSessionId (array $decodedContent, $sessionId) {
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: content[md5]=' . md5($decodedContent[self::PACKAGE_CONTENT_MESSAGE]) . ',sender=' . $sessionId . ',compressor=' . $decodedContent[self::PACKAGE_CONTENT_EXTENSION]);
+
+ // Create the hash
+ // @TODO crc32() is very weak, but it needs to be fast
+ $hash = crc32(
+ $decodedContent[self::PACKAGE_CONTENT_MESSAGE] .
+ self::PACKAGE_CHECKSUM_SEPARATOR .
+ $sessionId .
+ self::PACKAGE_CHECKSUM_SEPARATOR .
+ $decodedContent[self::PACKAGE_CONTENT_EXTENSION]
+ );
+
+ // And return it
+ return $hash;
+ }
+
///////////////////////////////////////////////////////////////////////////
// Delivering packages / raw data
///////////////////////////////////////////////////////////////////////////
* @return void
*/
private function declareRawPackageData (array $packageData) {
+ // Make sure the required field is there
+ assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
+
/*
* We need to disover every recipient, just in case we have a
* multi-recipient entry like 'upper' is. 'all' may be a not so good
// Now get an iterator
$iteratorInstance = $discoveryInstance->getIterator();
+ // Rewind back to the beginning
+ $iteratorInstance->rewind();
+
// ... and begin iteration
while ($iteratorInstance->valid()) {
// Get current entry
$currentRecipient = $iteratorInstance->current();
// Debug message
- $this->debugOutput('PACKAGE: Package declared for recipient ' . $currentRecipient);
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Setting recipient to ' . $currentRecipient . ',previous=' . $packageData[self::PACKAGE_DATA_RECIPIENT]);
// Set the recipient
$packageData[self::PACKAGE_DATA_RECIPIENT] = $currentRecipient;
// And enqueue it to the writer class
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECLARED, $packageData);
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Package declared for recipient ' . $currentRecipient);
+
// Skip to next entry
$iteratorInstance->next();
} // END - while
$discoveryInstance = SocketDiscoveryFactory::createSocketDiscoveryInstance();
// Now discover the right protocol
- $socketResource = $discoveryInstance->discoverSocket($packageData);
+ $socketResource = $discoveryInstance->discoverSocket($packageData, BaseConnectionHelper::CONNECTION_TYPE_OUTGOING);
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
// We have to put this socket in our registry, so get an instance
- $registryInstance = SocketRegistry::createSocketRegistry();
+ $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
// Get the listener from registry
$helperInstance = Registry::getRegistry()->getInstance('connection');
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: stateInstance=' . $helperInstance->getStateInstance());
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
// Is it not there?
if ((is_resource($socketResource)) && (!$registryInstance->isSocketRegistered($helperInstance, $socketResource))) {
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Registering socket ' . $socketResource . ' ...');
+
// Then register it
$registryInstance->registerSocket($helperInstance, $socketResource, $packageData);
- } // END - if
+ } elseif (!$helperInstance->getStateInstance()->isPeerStateConnected()) {
+ // Is not connected, then we cannot send
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Unexpected peer state ' . $helperInstance->getStateInstance()->__toString() . ' detected.');
+
+ // Shutdown the socket
+ $this->shutdownSocket($socketResource);
+ }
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
// Make sure the connection is up
$helperInstance->getStateInstance()->validatePeerStateConnected();
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' after validatePeerStateConnected() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Reached line ' . __LINE__ . ' after validatePeerStateConnected() has been called.');
// Enqueue it again on the out-going queue, the connection is up and working at this point
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_OUTGOING, $packageData);
+
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Reached line ' . __LINE__ . ' after pushNamed() has been called.');
}
/**
$sentBytes = 0;
// Get the right connection instance
- $helperInstance = SocketRegistry::createSocketRegistry()->getHandlerInstanceFromPackageData($packageData);
+ $helperInstance = SocketRegistryFactory::createSocketRegistryInstance()->getHandlerInstanceFromPackageData($packageData);
// Is this connection still alive?
if ($helperInstance->isShuttedDown()) {
$this->storeUnsentBytesInBackBuffer($packageData, $sentBytes);
}
+ /**
+ * Generates a signature for given raw package content and sender id
+ *
+ * @param $content Raw package data
+ * @param $senderId Sender id to generate a signature for
+ * @return $signature Signature as BASE64-encoded string
+ */
+ private function generatePackageSignature ($content, $senderId) {
+ // Hash content and sender id together, use md5() as last algo
+ $hash = md5($this->getCryptoInstance()->hashString($senderId . $content, $this->getPrivateKey(), false));
+
+ // Encrypt the content again with the hash as a key
+ $encryptedContent = $this->getCryptoInstance()->encryptString($content, $hash);
+
+ // Encode it with BASE64
+ $signature = base64_encode($encryptedContent);
+
+ // Return it
+ return $signature;
+ }
+
+ /**
+ * Checks whether the signature of given package data is 'valid', here that
+ * means it is the same or not.
+ *
+ * @param $decodedArray An array with 'decoded' (explode() was mostly called) data
+ * @return $isSignatureValid Whether the signature is valid
+ * @todo Unfinished area, signatures are currently NOT fully supported
+ */
+ private function isPackageSignatureValid (array $decodedArray) {
+ // Generate the signature of comparing it
+ $signature = $this->generatePackageSignature($decodedArray[self::INDEX_PACKAGE_CONTENT], $decodedArray[self::INDEX_PACKAGE_SENDER]);
+
+ // Is it the same?
+ //$isSignatureValid =
+ exit(__METHOD__.': signature='.$signature.chr(10).',decodedArray='.print_r($decodedArray,true));
+ }
+
/**
* "Enqueues" raw content into this delivery class by reading the raw content
- * from given template instance and pushing it on the 'undeclared' stack.
+ * from given helper's template instance and pushing it on the 'undeclared'
+ * stack.
*
- * @param $helperInstance An instance of a HelpableHub class
- * @param $nodeInstance An instance of a NodeHelper class
+ * @param $helperInstance An instance of a Helper class
+ * @param $protocol Name of used protocol (TCP/UDP)
* @return void
*/
- public function enqueueRawDataFromTemplate (HelpableHub $helperInstance, NodeHelper $nodeInstance) {
+ public function enqueueRawDataFromTemplate (Helper $helperInstance, $protocolName) {
// Get the raw content ...
$content = $helperInstance->getTemplateInstance()->getRawTemplateData();
+ //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('content(' . strlen($content) . ')=' . $content);
// ... and compress it
$content = $this->getCompressorInstance()->compressStream($content);
// Add magic in front of it and hash behind it, including BASE64 encoding
- $content = sprintf(self::PACKAGE_MASK,
+ $packageContent = sprintf(self::PACKAGE_MASK,
// 1.) Compressor's extension
$this->getCompressorInstance()->getCompressorExtension(),
// - separator
// - separator
self::PACKAGE_MASK_SEPARATOR,
// 4.) Checksum
- $this->getHashFromContent($content, $helperInstance, $nodeInstance)
+ $this->getHashFromContent($content)
);
// Now prepare the temporary array and push it on the 'undeclared' stack
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_UNDECLARED, array(
- self::PACKAGE_DATA_SENDER => $nodeInstance->getSessionId(),
+ self::PACKAGE_DATA_SENDER => $this->getSessionId(),
self::PACKAGE_DATA_RECIPIENT => $helperInstance->getRecipientType(),
- self::PACKAGE_DATA_CONTENT => $content,
- self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_NEW
+ self::PACKAGE_DATA_PROTOCOL => $protocolName,
+ self::PACKAGE_DATA_CONTENT => $packageContent,
+ self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_NEW,
+ self::PACKAGE_DATA_SIGNATURE => $this->generatePackageSignature($packageContent, $this->getSessionId())
));
}
return;
} // END - if
- // Now we know for sure there are packages to deliver, we can start
- // with the first one.
- $packageData = $this->getStackerInstance()->getNamed(self::STACKER_NAME_UNDECLARED);
+ /*
+ * Now there are for sure packages to deliver, so start with the first
+ * one.
+ */
+ $packageData = $this->getStackerInstance()->popNamed(self::STACKER_NAME_UNDECLARED);
// Declare the raw package data for delivery
$this->declareRawPackageData($packageData);
-
- // And remove it finally
- $this->getStackerInstance()->popNamed(self::STACKER_NAME_UNDECLARED);
}
/**
// Sanity check if we have packages declared
if (!$this->isPackageDeclared()) {
// This is not fatal but should be avoided
- // @TODO Add some logging here
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: No package has been declared, but ' . __METHOD__ . ' has been called!');
return;
} // END - if
// Get the package
$packageData = $this->getStackerInstance()->getNamed(self::STACKER_NAME_DECLARED);
+ // Assert on it
+ assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
+
+ // Try to deliver the package
try {
// And try to send it
$this->deliverRawPackageData($packageData);
$this->getStackerInstance()->popNamed(self::STACKER_NAME_DECLARED);
} catch (InvalidStateException $e) {
// The state is not excepected (shall be 'connected')
- $this->debugOutput('PACKAGE: Caught exception ' . $e->__toString() . ' with message=' . $e->getMessage());
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Caught ' . $e->__toString() . ',message=' . $e->getMessage());
// Mark the package with status failed
$this->changePackageStatus($packageData, self::STACKER_NAME_DECLARED, self::PACKAGE_STATUS_FAILED);
// Sanity check if we have packages waiting for delivery
if (!$this->isPackageWaitingForDelivery()) {
// This is not fatal but should be avoided
- $this->debugOutput('PACKAGE: No package is waiting for delivery, but ' . __METHOD__ . ' was called.');
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: No package is waiting for delivery, but ' . __METHOD__ . ' was called.');
return;
} // END - if
$this->getStackerInstance()->popNamed(self::STACKER_NAME_OUTGOING);
} catch (InvalidSocketException $e) {
// Output exception message
- $this->debugOutput('PACKAGE: Package was not delivered: ' . $e->getMessage());
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Package was not delivered: ' . $e->getMessage());
// Mark package as failed
$this->changePackageStatus($packageData, self::STACKER_NAME_OUTGOING, self::PACKAGE_STATUS_FAILED);
*
* @return $isPending Whether decoded raw data is pending
*/
- private function isDecodedDataPending () {
+ private function isRawDataPending () {
// Just return whether the stack is not empty
$isPending = (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_DECODED_INCOMING));
$poolInstance->accept($this->getVisitorInstance());
// Check for new data arrival
- $hasArrived = $this->isDecodedDataPending();
+ $hasArrived = $this->isRawDataPending();
// Return the status
return $hasArrived;
* This method should only be called if decoded raw data is pending,
* so check it again.
*/
- if (!$this->isDecodedDataPending()) {
+ if (!$this->isRawDataPending()) {
// This is not fatal but should be avoided
// @TODO Add some logging here
return;
} // END - if
// Very noisy debug message:
- /* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: Stacker size is ' . $this->getStackerInstance()->getStackCount(self::STACKER_NAME_DECODED_INCOMING) . ' entries.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: Stacker size is ' . $this->getStackerInstance()->getStackCount(self::STACKER_NAME_DECODED_INCOMING) . ' entries.');
// "Pop" the next entry (the same array again) from the stack
$decodedData = $this->getStackerInstance()->popNamed(self::STACKER_NAME_DECODED_INCOMING);
// Make sure both array elements are there
assert(
(is_array($decodedData)) &&
- (isset($decodedData[BaseRawDataHandler::PACKAGE_DECODED_DATA])) &&
+ (isset($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
(isset($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
);
* Also make sure the error code is SOCKET_ERROR_UNHANDLED because we
* only want to handle unhandled packages here.
*/
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: errorCode=' . $decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] . '(' . BaseRawDataHandler::SOCKET_ERROR_UNHANDLED . ')');
assert($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] == BaseRawDataHandler::SOCKET_ERROR_UNHANDLED);
// Remove the last chunk SEPARATOR (because it is being added and we don't need it)
- if (substr($decodedData[BaseRawDataHandler::PACKAGE_DECODED_DATA], -1, 1) == PackageFragmenter::CHUNK_SEPARATOR) {
+ if (substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], -1, 1) == PackageFragmenter::CHUNK_SEPARATOR) {
// It is there and should be removed
- $decodedData[BaseRawDataHandler::PACKAGE_DECODED_DATA] = substr($decodedData[BaseRawDataHandler::PACKAGE_DECODED_DATA], 0, -1);
+ $decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA] = substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], 0, -1);
} // END - if
// This package is "handled" and can be pushed on the next stack
* @param $handlerInstance An instance of a Networkable class
* @return void
*/
- public function addDecodedDataToIncomingStack (Networkable $handlerInstance) {
+ public function addRawDataToIncomingStack (Networkable $handlerInstance) {
/*
* Get the decoded data from the handler, this is an array with
- * 'decoded_data' and 'error_code' as elements.
+ * 'raw_data' and 'error_code' as elements.
*/
- $decodedData = $handlerInstance->getNextDecodedData();
+ $decodedData = $handlerInstance->getNextRawData();
// Very noisy debug message:
- //* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: decodedData[' . gettype($decodedData) . ']=' . print_r($decodedData, true));
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: decodedData[' . gettype($decodedData) . ']=' . print_r($decodedData, true));
// And push it on our stack
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECODED_INCOMING, $decodedData);
*
* @return $isHandled Whether incoming decoded data is handled
*/
- public function isIncomingDecodedDataHandled () {
+ public function isIncomingRawDataHandled () {
// Determine if the stack is not empty
$isHandled = (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_DECODED_HANDLED));
return $isHandled;
}
+ /**
+ * Checks whether the assembler has pending data left
+ *
+ * @return $isHandled Whether the assembler has pending data left
+ */
+ public function ifAssemblerHasPendingDataLeft () {
+ // Determine if the stack is not empty
+ $isHandled = (!$this->getAssemblerInstance()->isPendingDataEmpty());
+
+ // Return it
+ return $isHandled;
+ }
+
+ /**
+ * Handles the attached assemler's pending data queue to be finally
+ * assembled to the raw package data back.
+ *
+ * @return void
+ */
+ public function handleAssemblerPendingData () {
+ // Handle it
+ $this->getAssemblerInstance()->handlePendingData();
+ }
+
/**
* Assembles incoming decoded data so it will become an abstract network
* package again. The assembler does later do it's job by an other task,
*/
public function assembleDecodedDataToPackage () {
// Make sure the raw decoded package data is handled
- assert($this->isIncomingDecodedDataHandled());
+ assert($this->isIncomingRawDataHandled());
// Get current package content (an array with two elements; see handleIncomingDecodedData() for details)
$packageContent = $this->getStackerInstance()->getNamed(self::STACKER_NAME_DECODED_HANDLED);
- // Get a singleton package assembler instance from factory
- $assemblerInstance = PackageAssemblerFactory::createAssemblerInstance();
-
// Start assembling the raw package data array by chunking it
- $assemblerInstance->chunkPackageContent($packageContent);
+ $this->getAssemblerInstance()->chunkPackageContent($packageContent);
// Remove the package from 'handled_decoded' stack ...
$this->getStackerInstance()->popNamed(self::STACKER_NAME_DECODED_HANDLED);
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECODED_CHUNKED, $packageContent);
}
- /**
- * Checks whether a new package has arrived
- *
- * @return $hasArrived Whether a new package has arrived for processing
- */
- public function isNewPackageArrived () {
- // @TODO Add some content here
- }
-
/**
* Accepts the visitor to process the visit "request"
*
*/
public function accept (Visitor $visitorInstance) {
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: ' . $visitorInstance->__toString() . ' has visited - START');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - START');
// Visit the package
$visitorInstance->visitNetworkPackage($this);
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: ' . $visitorInstance->__toString() . ' has visited - FINISHED');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - FINISHED');
}
/**
$this->initStackers(true);
// Debug message
- /* DEBUG: */ $this->debugOutput('PACKAGE: All stacker have been re-initialized.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: All stacker have been re-initialized.');
}
/**
// Remove this entry
$this->getStackerInstance()->popNamed(self::STACKER_NAME_DECLARED);
}
+
+ /**
+ * "Decode" the package content into the same array when it was sent.
+ *
+ * @param $rawPackageContent The raw package content to be "decoded"
+ * @return $decodedData An array with 'sender', 'recipient', 'content' and 'status' elements
+ */
+ public function decodeRawContent ($rawPackageContent) {
+ // Use the separator '#' to "decode" it
+ $decodedArray = explode(self::PACKAGE_DATA_SEPARATOR, $rawPackageContent);
+
+ // Assert on count (should be always 3)
+ assert(count($decodedArray) == self::DECODED_DATA_ARRAY_SIZE);
+
+ // Generate the signature of comparing it
+ /*
+ * @todo Unsupported feature of "signed" messages commented out
+ if (!$this->isPackageSignatureValid($decodedArray)) {
+ // Is not valid, so throw an exception here
+ exit(__METHOD__ . ':INVALID SIG! UNDER CONSTRUCTION!' . chr(10));
+ } // END - if
+ */
+
+ /*
+ * Create 'decodedData' array with all assoziative array elements,
+ * except signature.
+ */
+ $decodedData = array(
+ self::PACKAGE_DATA_SENDER => $decodedArray[self::INDEX_PACKAGE_SENDER],
+ self::PACKAGE_DATA_RECIPIENT => $decodedArray[self::INDEX_PACKAGE_RECIPIENT],
+ self::PACKAGE_DATA_CONTENT => $decodedArray[self::INDEX_PACKAGE_CONTENT],
+ self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_DECODED
+ );
+
+ // And return it
+ return $decodedData;
+ }
+
+ /**
+ * Handles decoded data for this node by "decoding" the 'content' part of
+ * it. Again this method uses explode() for the "decoding" process.
+ *
+ * @param $decodedData An array with decoded raw package data
+ * @return void
+ * @throws InvalidDataChecksumException If the checksum doesn't match
+ */
+ public function handleRawData (array $decodedData) {
+ /*
+ * "Decode" the package's content by a simple explode() call, for
+ * details of the array elements, see comments for constant
+ * PACKAGE_MASK.
+ */
+ $decodedContent = explode(self::PACKAGE_MASK_SEPARATOR, $decodedData[self::PACKAGE_DATA_CONTENT]);
+
+ // Assert on array count for a very basic validation
+ assert(count($decodedContent) == self::PACKAGE_CONTENT_ARRAY_SIZE);
+
+ /*
+ * Convert the indexed array into an associative array. This is much
+ * better to remember than plain numbers, isn't it?
+ */
+ $decodedContent = array(
+ // Compressor's extension used to compress the data
+ self::PACKAGE_CONTENT_EXTENSION => $decodedContent[self::INDEX_COMPRESSOR_EXTENSION],
+ // Package data (aka "message") in BASE64-decoded form but still compressed
+ self::PACKAGE_CONTENT_MESSAGE => base64_decode($decodedContent[self::INDEX_PACKAGE_DATA]),
+ // Tags as an indexed array for "tagging" the message
+ self::PACKAGE_CONTENT_TAGS => explode(self::PACKAGE_TAGS_SEPARATOR, $decodedContent[self::INDEX_TAGS]),
+ // Checksum of the _decoded_ data
+ self::PACKAGE_CONTENT_CHECKSUM => $decodedContent[self::INDEX_CHECKSUM]
+ );
+
+ // Is the checksum valid?
+ if (!$this->isChecksumValid($decodedContent, $decodedData)) {
+ // Is not the same, so throw an exception here
+ throw new InvalidDataChecksumException(array($this, $decodedContent, $decodedData), BaseListener::EXCEPTION_INVALID_DATA_CHECKSUM);
+ } // END - if
+
+ /*
+ * The checksum is the same, then it can be decompressed safely. The
+ * original message is at this point fully decoded.
+ */
+ $decodedContent[self::PACKAGE_CONTENT_MESSAGE] = $this->getCompressorInstance()->decompressStream($decodedContent[self::PACKAGE_CONTENT_MESSAGE]);
+
+ // And push it on the next stack
+ $this->getStackerInstance()->pushNamed(self::STACKER_NAME_NEW_MESSAGE, $decodedContent);
+ }
+
+ /**
+ * Checks whether a new message has arrived
+ *
+ * @return $hasArrived Whether a new message has arrived for processing
+ */
+ public function isNewMessageArrived () {
+ // Determine if the stack is not empty
+ $hasArrived = (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_NEW_MESSAGE));
+
+ // Return it
+ return $hasArrived;
+ }
+
+ /**
+ * Handles newly arrived messages
+ *
+ * @return void
+ * @todo Implement verification of all sent tags here?
+ */
+ public function handleNewlyArrivedMessage () {
+ // Get it from the stacker, it is the full array with the decoded message
+ $decodedContent = $this->getStackerInstance()->popNamed(self::STACKER_NAME_NEW_MESSAGE);
+
+ // Now get a filter chain back from factory with given tags array
+ $chainInstance = PackageFilterChainFactory::createChainByTagsArray($decodedContent[self::PACKAGE_CONTENT_TAGS]);
+
+ /*
+ * Process the message through all filters, note that all other
+ * elements from $decodedContent are no longer needed.
+ */
+ $chainInstance->processMessage($decodedContent[self::PACKAGE_CONTENT_MESSAGE], $this);
+ }
+
+ /**
+ * Checks whether a processed message is pending for "interpretation"
+ *
+ * @return $isPending Whether a processed message is pending
+ */
+ public function isProcessedMessagePending () {
+ // Check it
+ $isPending = (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_PROCESSED_MESSAGE));
+
+ // Return it
+ return $isPending;
+ }
+
+ /**
+ * Handle processed messages by "interpreting" the 'message_type' element
+ *
+ * @return void
+ */
+ public function handleProcessedMessage () {
+ // Get it from the stacker, it is the full array with the processed message
+ $messageArray = $this->getStackerInstance()->popNamed(self::STACKER_NAME_PROCESSED_MESSAGE);
+
+ // Add type for later easier handling
+ $messageArray[self::MESSAGE_ARRAY_DATA][self::MESSAGE_ARRAY_TYPE] = $messageArray[self::MESSAGE_ARRAY_TYPE];
+
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __LINE__ . ']: messageArray=' . print_r($messageArray, true));
+
+ // Create a handler instance from given message type
+ $handlerInstance = MessageTypeHandlerFactory::createMessageTypeHandlerInstance($messageArray[self::MESSAGE_ARRAY_TYPE]);
+
+ // Handle message data
+ $handlerInstance->handleMessageData($messageArray[self::MESSAGE_ARRAY_DATA], $this);
+ }
}
// [EOF]
projects / hub.git / blobdiff