*
* @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
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_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';
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
*/
const PACKAGE_DATA_SEPARATOR = '#';
+ /**
+ * Separator for more than one recipient
+ */
+ const PACKAGE_RECIPIENT_SEPARATOR = ':';
+
/**
* Network target (alias): 'upper hubs'
*/
*/
const TCP_PACKAGE_SIZE = 512;
- /**
- * Size of the decoded data array
- */
- const DECODED_DATA_ARRAY_SIZE = 4;
-
/**************************************************************************
* Stacker for out-going packages *
**************************************************************************/
*/
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 in this package
+ // 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
+ // Get a singleton package assembler instance from factory and set it here, too
$assemblerInstance = PackageAssemblerFactory::createAssemblerInstance($packageInstance);
$packageInstance->setAssemblerInstance($assemblerInstance);
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
}
/**
- * "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
+ * @param $content Raw package content
+ * @return $hash Hash for given package content
*/
private function getHashFromContent ($content) {
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: 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(
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
*
// Pop the entry (it should be it)
$nextData = $this->getStackerInstance()->popNamed($stackerName);
- // Compare both arrays
+ // Compare both signatures
assert($nextData[self::PACKAGE_DATA_SIGNATURE] == $packageData[self::PACKAGE_DATA_SIGNATURE]);
// Temporary set the new status
$this->getStackerInstance()->pushNamed($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, $sessionId) {
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: content[md5]=' . md5($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
///////////////////////////////////////////////////////////////////////////
// Get current entry
$currentRecipient = $iteratorInstance->current();
+ // Debug message
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: Setting recipient to ' . $currentRecipient . ',previous=' . $packageData[self::PACKAGE_DATA_RECIPIENT]);
+
// Set the recipient
$packageData[self::PACKAGE_DATA_RECIPIENT] = $currentRecipient;
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECLARED, $packageData);
// Debug message
- $this->debugOutput('PACKAGE: Package declared for recipient ' . $currentRecipient);
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: Package declared for recipient ' . $currentRecipient);
// Skip to next entry
$iteratorInstance->next();
$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('PACKAGE: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: 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('PACKAGE: stateInstance=' . $helperInstance->getStateInstance());
- //* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: stateInstance=' . $helperInstance->getStateInstance());
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
// Is it not there?
if ((is_resource($socketResource)) && (!$registryInstance->isSocketRegistered($helperInstance, $socketResource))) {
// Debug message
- $this->debugOutput('PACKAGE: Registering socket ' . $socketResource . ' ...');
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: Registering socket ' . $socketResource . ' ...');
// Then register it
$registryInstance->registerSocket($helperInstance, $socketResource, $packageData);
} elseif (!$helperInstance->getStateInstance()->isPeerStateConnected()) {
// Is not connected, then we cannot send
- $this->debugOutput('PACKAGE: Unexpected peer state ' . $helperInstance->getStateInstance()->__toString() . ' detected.');
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: Unexpected peer state ' . $helperInstance->getStateInstance()->__toString() . ' detected.');
// Shutdown the socket
$this->shutdownSocket($socketResource);
}
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
// Make sure the connection is up
$helperInstance->getStateInstance()->validatePeerStateConnected();
// Debug message
- //* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: Reached line ' . __LINE__ . ' after validatePeerStateConnected() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: 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: */ $this->debugOutput('PACKAGE: Reached line ' . __LINE__ . ' after pushNamed() has been called.');
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: 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()) {
* @return $signature Signature as BASE64-encoded string
*/
private function generatePackageSignature ($content, $senderId) {
- // ash content and sender id together, use md5() as last algo
- $hash = md5($this->getCryptoInstance()->hashString($senderId . $content, $this->getNodeId(), false));
+ // 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);
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 $protocol Name of used protocol (TCP/UDP)
* @return void
*/
- public function enqueueRawDataFromTemplate (HelpableHub $helperInstance) {
+ public function enqueueRawDataFromTemplate (HelpableHub $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);
$this->getStackerInstance()->pushNamed(self::STACKER_NAME_UNDECLARED, array(
self::PACKAGE_DATA_SENDER => $this->getSessionId(),
self::PACKAGE_DATA_RECIPIENT => $helperInstance->getRecipientType(),
+ self::PACKAGE_DATA_PROTOCOL => $protocolName,
self::PACKAGE_DATA_CONTENT => $content,
self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_NEW,
self::PACKAGE_DATA_SIGNATURE => $this->generatePackageSignature($content, $this->getSessionId())
return;
} // END - if
- // Now we know for sure there are packages to deliver, we can start
- // with the first one.
+ /*
+ * Now there are for sure packages to deliver, so start with the first
+ * one.
+ */
$packageData = $this->getStackerInstance()->getNamed(self::STACKER_NAME_UNDECLARED);
// Declare the raw package data for delivery
// Sanity check if we have packages declared
if (!$this->isPackageDeclared()) {
// This is not fatal but should be avoided
- $this->debugOutput('PACKAGE: No package has been declared, but ' . __METHOD__ . ' has been called!');
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: No package has been declared, but ' . __METHOD__ . ' has been called!');
return;
} // END - if
$this->getStackerInstance()->popNamed(self::STACKER_NAME_DECLARED);
} catch (InvalidStateException $e) {
// The state is not excepected (shall be 'connected')
- $this->debugOutput('PACKAGE: Caught ' . $e->__toString() . ',message=' . $e->getMessage());
+ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: 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: 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: 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 $hasArrived;
*
* @return void
*/
- public function handleIncomingDecodedData () {
+ public function handleIncomingRawData () {
/*
* This method should only be called if decoded raw data is pending,
* so check it again.
*/
- if (!$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: 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: */ $this->debugOutput('NETWORK-PACKAGE: errorCode=' . $decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE]);
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: 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($decodedData, true));
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: decodedData[' . gettype($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 void
*/
- public function assembleDecodedDataToPackage () {
+ public function assembleRawDataToPackage () {
// 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)
+ // Get current package content (an array with two elements; see handleIncomingRawData() for details)
$packageContent = $this->getStackerInstance()->getNamed(self::STACKER_NAME_DECODED_HANDLED);
// Start assembling the raw package data array by chunking it
$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: ' . $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: ' . $visitorInstance->__toString() . ' has visited - FINISHED');
}
/**
$this->initStackers(true);
// Debug message
- /* DEBUG: */ $this->debugOutput('PACKAGE: All stacker have been re-initialized.');
+ /* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE: All stacker have been re-initialized.');
}
/**
// Assert on count (should be always 3)
assert(count($decodedArray) == self::DECODED_DATA_ARRAY_SIZE);
- // Create 'decodedData' array with all assoziative array elements
+ // 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,
- self::PACKAGE_DATA_SIGNATURE => $this->generatePackageSignature($decodedArray[self::INDEX_PACKAGE_CONTENT], $decodedArray[self::INDEX_PACKAGE_SENDER])
+ 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);
+
+ // 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