X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=application%2Fhub%2Fmain%2Fpackage%2Fclass_NetworkPackage.php;h=0d1895047c500b738720f574d3c013ce8306b753;hb=fa1e85c6f610356bc1b4f7b01a57acce6741782f;hp=bd094561cb783993cbe75523b799ec212d436b5c;hpb=dfe38c5c2ff89adebea4f61364eb556a83da35a3;p=hub.git

diff --git a/application/hub/main/package/class_NetworkPackage.php b/application/hub/main/package/class_NetworkPackage.php
index bd094561c..0d1895047 100644
--- a/application/hub/main/package/class_NetworkPackage.php
+++ b/application/hub/main/package/class_NetworkPackage.php
@@ -15,11 +15,11 @@
  * For performance reasons, this class should only be instanciated once and then
  * used as a "pipe-through" class.
  *
- * @author		Roland Haeder <webmaster@ship-simu.org>
+ * @author		Roland Haeder <webmaster@shipsimu.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
+ * @link		http://www.shipsimu.org
  * @todo		Needs to add functionality for handling the object's type
  *
  * This program is free software: you can redistribute it and/or modify
@@ -35,7 +35,7 @@
  * 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
@@ -52,7 +52,13 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	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 = '_';
 
@@ -71,41 +77,79 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	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
 	 */
@@ -150,13 +194,63 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	const STACKER_NAME_DECODED_CHUNKED = 'package_chunked_decoded';
 
 	/**************************************************************************
-	 *                   Stacker for other/internal purposes                  *
+	 *                     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 raw data handling                     *
 	 **************************************************************************/
 
 	/**
-	 * Stacker name for "back-buffered" packages
+	 * Stacker for outgoing data stream
+	 */
+	const STACKER_NAME_OUTGOING_STREAM = 'outgoing_stream';
+
+	/**
+	 * Array index for final hash
+	 */
+	const RAW_FINAL_HASH_INDEX = 'hash';
+
+	/**
+	 * Array index for encoded data
+	 */
+	const RAW_ENCODED_DATA_INDEX = 'data';
+
+	/**
+	 * Array index for sent bytes
+	 */
+	const RAW_SENT_BYTES_INDEX = 'sent';
+
+	/**
+	 * Array index for socket resource
+	 */
+	const RAW_SOCKET_INDEX = 'socket';
+
+	/**
+	 * Array index for buffer size
+	 */
+	const RAW_BUFFER_SIZE_INDEX = 'buffer';
+
+	/**
+	 * Array index for diff between buffer and sent bytes
 	 */
-	const STACKER_NAME_BACK_BUFFER = 'package_backbuffer';
+	const RAW_DIFF_INDEX = 'diff';
+
+	/**************************************************************************
+	 *                            Protocol names                              *
+	 **************************************************************************/
+	const PROTOCOL_TCP = 'TCP';
+	const PROTOCOL_UDP = 'UDP';
 
 	/**
 	 * Protected constructor
@@ -186,20 +280,26 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		 * which have no recipient address and stamp... ;-) This stacker will
 		 * also be used for incoming raw data to handle it.
 		 */
-		$stackerInstance = ObjectFactory::createObjectByConfiguredName('network_package_stacker_class');
+		$stackInstance = ObjectFactory::createObjectByConfiguredName('network_package_stacker_class');
 
 		// At last, set it in this class
-		$packageInstance->setStackerInstance($stackerInstance);
+		$packageInstance->setStackInstance($stackInstance);
 
 		// Init all stacker
-		$packageInstance->initStackers();
+		$packageInstance->initStacks();
 
-		// 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;
 	}
@@ -210,47 +310,66 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 * @param	$forceReInit	Whether to force reinitialization of all stacks
 	 * @return	void
 	 */
-	protected function initStackers ($forceReInit = false) {
+	protected function initStacks ($forceReInit = FALSE) {
 		// Initialize all
-		foreach (
-			array(
-				self::STACKER_NAME_UNDECLARED,
-				self::STACKER_NAME_DECLARED,
-				self::STACKER_NAME_OUTGOING,
-				self::STACKER_NAME_DECODED_INCOMING,
-				self::STACKER_NAME_DECODED_HANDLED,
-				self::STACKER_NAME_DECODED_CHUNKED,
-				self::STACKER_NAME_BACK_BUFFER
-			) as $stackerName) {
-				// Init this stacker
-				$this->getStackerInstance()->initStacker($stackerName, $forceReInit);
-		} // END - foreach
-	}
-
-	/**
-	 * "Getter" for hash from given content and helper instance
-	 *
-	 * @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
+		$this->getStackInstance()->initStacks(array(
+			self::STACKER_NAME_UNDECLARED,
+			self::STACKER_NAME_DECLARED,
+			self::STACKER_NAME_OUTGOING,
+			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_OUTGOING_STREAM
+		), $forceReInit);
+	}
+
+	/**
+	 * "Getter" for hash from given content
+	 *
+	 * @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[' . __METHOD__ . ':' . __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(
+		// @TODO md5() is very weak, but it needs to be fast
+		$hash = md5(
 			$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[' . __METHOD__ . ':' . __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
 	 *
@@ -261,19 +380,47 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	private function changePackageStatus (array $packageData, $stackerName, $newStatus) {
 		// Skip this for empty stacks
-		if ($this->getStackerInstance()->isStackEmpty($stackerName)) {
+		if ($this->getStackInstance()->isStackEmpty($stackerName)) {
 			// This avoids an exception after all packages has failed
 			return;
 		} // END - if
 
 		// Pop the entry (it should be it)
-		$this->getStackerInstance()->popNamed($stackerName);
+		$nextData = $this->getStackInstance()->popNamed($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;
 
 		// And push it again
-		$this->getStackerInstance()->pushNamed($stackerName, $packageData);
+		$this->getStackInstance()->pushNamed($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, $sessionId) {
+		// Debug message
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($decodedContent[self::PACKAGE_CONTENT_MESSAGE]) . ',sender=' . $sessionId . ',compressor=' . $decodedContent[self::PACKAGE_CONTENT_EXTENSION]);
+
+		// Create the hash
+		// @TODO md5() is very weak, but it needs to be fast
+		$hash = md5(
+			$decodedContent[self::PACKAGE_CONTENT_MESSAGE] .
+			self::PACKAGE_CHECKSUM_SEPARATOR .
+			$sessionId .
+			self::PACKAGE_CHECKSUM_SEPARATOR .
+			$decodedContent[self::PACKAGE_CONTENT_EXTENSION]
+		);
+
+		// And return it
+		return $hash;
 	}
 
 	///////////////////////////////////////////////////////////////////////////
@@ -281,12 +428,15 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	///////////////////////////////////////////////////////////////////////////
 
 	/**
-	 * Delivers the given raw package data.
+	 * Declares the given raw package data by discovering recipients
 	 *
 	 * @param	$packageData	Raw package data in an array
 	 * @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
@@ -301,19 +451,25 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		// 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[' . __METHOD__ . ':' . __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);
+			// Push the declared package to the next stack.
+			$this->getStackInstance()->pushNamed(self::STACKER_NAME_DECLARED, $packageData);
+
+			// Debug message
+			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package declared for recipient ' . $currentRecipient);
 
 			// Skip to next entry
 			$iteratorInstance->next();
@@ -352,37 +508,53 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		$discoveryInstance = SocketDiscoveryFactory::createSocketDiscoveryInstance();
 
 		// Now discover the right protocol
-		$socketResource = $discoveryInstance->discoverSocket($packageData);
+		$socketResource = $discoveryInstance->discoverSocket($packageData, BaseConnectionHelper::CONNECTION_TYPE_OUTGOING);
+
+		// Debug message
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
 
 		// Debug message
-		//* NOISY-DEBUG: */ $this->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: stateInstance=' . $helperInstance->getStateInstance());
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
 
-		// We have to put this socket in our registry, so get an instance
-		$registryInstance = SocketRegistry::createSocketRegistry();
+		// The socket needs to be put in a special registry that can handle such data
+		$registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
 
-		// Get the listener from registry
+		// Get the connection helper from registry
 		$helperInstance = Registry::getRegistry()->getInstance('connection');
 
-		// Debug message
-		//* NOISY-DEBUG: */ $this->debugOutput('NETWORK-PACKAGE: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
+		// And make sure it is valid
+		assert($helperInstance instanceof ConnectionHelper);
 
 		// Is it not there?
 		if ((is_resource($socketResource)) && (!$registryInstance->isSocketRegistered($helperInstance, $socketResource))) {
+			// Debug message
+			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __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[' . __METHOD__ . ':' . __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[' . __METHOD__ . ':' . __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[' . __METHOD__ . ':' . __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);
+		$this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING, $packageData);
+
+		// Debug message
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after pushNamed() has been called.');
 	}
 
 	/**
@@ -396,7 +568,7 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		$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()) {
@@ -406,29 +578,68 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		} // END - if
 
 		// Sent out package data
-		$sentBytes = $helperInstance->sendRawPackageData($packageData);
+		$helperInstance->sendRawPackageData($packageData);
+	}
+
+	/**
+	 * 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]);
 
-		// Remember unsent raw bytes in back-buffer, if any
-		$this->storeUnsentBytesInBackBuffer($packageData, $sentBytes);
+		// Is it the same?
+		//$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
 	 * @return	void
 	 */
-	public function enqueueRawDataFromTemplate (HelpableHub $helperInstance, NodeHelper $nodeInstance) {
+	public function enqueueRawDataFromTemplate (Helper $helperInstance) {
+		// Get protocol instance for recipient
+		$protocolInstance = ProtocolHandlerFactory::createProtocolFromRecipientHelper($helperInstance);
+
 		// 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
@@ -442,15 +653,17 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 			// - 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(),
+		$this->getStackInstance()->pushNamed(self::STACKER_NAME_UNDECLARED, array(
+			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  => $protocolInstance->getProtocolName(),
+			self::PACKAGE_DATA_CONTENT   => $packageContent,
+			self::PACKAGE_DATA_STATUS    => self::PACKAGE_STATUS_NEW,
+			self::PACKAGE_DATA_SIGNATURE => $this->generatePackageSignature($packageContent, $this->getSessionId())
 		));
 	}
 
@@ -461,7 +674,7 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	public function isPackageEnqueued () {
 		// Check whether the stacker is not empty
-		$isEnqueued = (($this->getStackerInstance()->isStackInitialized(self::STACKER_NAME_UNDECLARED)) && (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_UNDECLARED)));
+		$isEnqueued = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_UNDECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_UNDECLARED)));
 
 		// Return the result
 		return $isEnqueued;
@@ -474,7 +687,7 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	public function isPackageDeclared () {
 		// Check whether the stacker is not empty
-		$isDeclared = (($this->getStackerInstance()->isStackInitialized(self::STACKER_NAME_DECLARED)) && (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_DECLARED)));
+		$isDeclared = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_DECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECLARED)));
 
 		// Return the result
 		return $isDeclared;
@@ -487,12 +700,25 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	public function isPackageWaitingForDelivery () {
 		// Check whether the stacker is not empty
-		$isWaitingDelivery = (($this->getStackerInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING)) && (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING)));
+		$isWaitingDelivery = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING)));
 
 		// Return the result
 		return $isWaitingDelivery;
 	}
 
+	/**
+	 * Checks whether encoded (raw) data is pending
+	 *
+	 * @return	$isPending		Whether encoded data is pending
+	 */
+	public function isEncodedDataPending () {
+		// Check whether the stacker is not empty
+		$isPending = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING_STREAM)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING_STREAM)));
+
+		// Return the result
+		return $isPending;
+	}
+
 	/**
 	 * Delivers an enqueued package to the stated destination. If a non-session
 	 * id is provided, recipient resolver is being asked (and instanced once).
@@ -507,19 +733,18 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		// Make sure this method isn't working if there is no package enqueued
 		if (!$this->isPackageEnqueued()) {
 			// This is not fatal but should be avoided
-			// @TODO Add some logging here
+			self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw package data waiting declaration, but ' . __METHOD__ . ' has been called!');
 			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->getStackInstance()->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);
 	}
 
 	/**
@@ -529,26 +754,30 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 *
 	 * @return	void
 	 */
-	public function deliverDeclaredPackage () {
+	public function processDeclaredPackage () {
 		// 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[' . __METHOD__ . ':' . __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);
+		$packageData = $this->getStackInstance()->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);
 
 			// And remove it finally
-			$this->getStackerInstance()->popNamed(self::STACKER_NAME_DECLARED);
+			$this->getStackInstance()->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[' . __METHOD__ . ':' . __LINE__ . ']: Caught ' . $e->__toString() . ',message=' . $e->getMessage());
 
 			// Mark the package with status failed
 			$this->changePackageStatus($packageData, self::STACKER_NAME_DECLARED, self::PACKAGE_STATUS_FAILED);
@@ -561,34 +790,98 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 * @return	void
 	 */
 	public function sendWaitingPackage () {
-		// Send any waiting bytes in the back-buffer before sending a new package
-		$this->sendBackBufferBytes();
-
 		// Sanity check if we have packages waiting for delivery
 		if (!$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[' . __METHOD__ . ':' . __LINE__ . ']: No package is waiting for delivery, but ' . __METHOD__ . ' was called.');
 			return;
 		} // END - if
 
 		// Get the package
-		$packageData = $this->getStackerInstance()->getNamed(self::STACKER_NAME_OUTGOING);
+		$packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_OUTGOING);
 
 		try {
 			// Now try to send it
 			$this->sendOutgoingRawPackageData($packageData);
 
 			// And remove it finally
-			$this->getStackerInstance()->popNamed(self::STACKER_NAME_OUTGOING);
+			$this->getStackInstance()->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[' . __METHOD__ . ':' . __LINE__ . ']: Package was not delivered: ' . $e->getMessage());
 
 			// Mark package as failed
 			$this->changePackageStatus($packageData, self::STACKER_NAME_OUTGOING, self::PACKAGE_STATUS_FAILED);
 		}
 	}
 
+	/**
+	 * Sends out encoded data to a socket
+	 *
+	 * @return	void
+	 */
+	public function sendEncodedData () {
+		// Make sure there is pending encoded data
+		assert($this->isEncodedDataPending());
+
+		// Pop current data from stack
+		$encodedDataArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING_STREAM);
+
+		// Init in this round sent bytes
+		$sentBytes = 0;
+
+		// Assert on socket
+		assert(is_resource($encodedDataArray[self::RAW_SOCKET_INDEX]));
+
+		// And deliver it
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: Sending out ' . strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) . ' bytes,rawBufferSize=' . $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] . ',diff=' . $encodedDataArray[self::RAW_DIFF_INDEX]);
+		if ($encodedDataArray[self::RAW_DIFF_INDEX] >= 0) {
+			// Send all out (encodedData is smaller than or equal buffer size)
+			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: MD5=' . md5(substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], 0, ($encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - $encodedDataArray[self::RAW_DIFF_INDEX]))));
+			$sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], ($encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - $encodedDataArray[self::RAW_DIFF_INDEX]));
+		} else {
+			// Send buffer size out
+			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: MD5=' . md5(substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], 0, $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX])));
+			$sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX]);
+		}
+
+		// If there was an error, we don't continue here
+		if ($sentBytes === FALSE) {
+			// Handle the error with a faked recipientData array
+			$this->handleSocketError(__METHOD__, __LINE__, $encodedDataArray[self::RAW_SOCKET_INDEX], array('0.0.0.0', '0'));
+
+			// And throw it
+			throw new InvalidSocketException(array($this, $encodedDataArray[self::RAW_SOCKET_INDEX], $socketError, $errorMessage), BaseListener::EXCEPTION_INVALID_SOCKET);
+		} elseif (($sentBytes === 0) && (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) > 0)) {
+			// Nothing sent means we are done
+			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
+			return;
+		} else {
+			// The difference between sent bytes and length of raw data should not go below zero
+			assert((strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) - $sentBytes) >= 0);
+
+			// Add total sent bytes
+			$encodedDataArray[self::RAW_SENT_BYTES_INDEX] += $sentBytes;
+
+			// Cut out the last unsent bytes
+			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: Sent out ' . $sentBytes . ' of ' . strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) . ' bytes ...');
+			$encodedDataArray[self::RAW_ENCODED_DATA_INDEX] = substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $sentBytes);
+
+			// Calculate difference again
+			$encodedDataArray[self::RAW_DIFF_INDEX] = $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]);
+
+			// Can we abort?
+			if (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) <= 0) {
+				// Abort here, all sent!
+				//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
+				return;
+			} // END - if
+		}
+
+		// Push array back in stack
+		$this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING_STREAM, $encodedDataArray);
+	}
+
 	///////////////////////////////////////////////////////////////////////////
 	//                   Receiving packages / raw data
 	///////////////////////////////////////////////////////////////////////////
@@ -598,9 +891,9 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 *
 	 * @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));
+		$isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_INCOMING));
 
 		// Return the status
 		return $isPending;
@@ -617,7 +910,7 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		$poolInstance->accept($this->getVisitorInstance());
 
 		// Check for new data arrival
-		$hasArrived = $this->isDecodedDataPending();
+		$hasArrived = $this->isRawDataPending();
 
 		// Return the status
 		return $hasArrived;
@@ -635,22 +928,22 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		 * This method should only be called if decoded raw data is pending,
 		 * so check it again.
 		 */
-		if (!$this->isDecodedDataPending()) {
+		if (!$this->isRawDataPending()) {
 			// This is not fatal but should be avoided
-			// @TODO Add some logging here
+			self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw (decoded?) data is pending, but ' . __METHOD__ . ' has been called!');
 			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[' . __METHOD__ . ':' . __LINE__ . ']: Stacker size is ' . $this->getStackInstance()->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);
+		$decodedData = $this->getStackInstance()->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]))
 		);
 
@@ -658,16 +951,18 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		 * 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[' . __METHOD__ . ':' . __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($decodedData[BaseRawDataHandler::PACKAGE_DECODED_DATA], -1, 1) == PackageFragmenter::CHUNK_SEPARATOR) {
+		// Remove the last chunk SEPARATOR (because there is no need for it)
+		if (substr($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
-		$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECODED_HANDLED, $decodedData);
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Pushing ' . strlen($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA]) . ' bytes to stack ' . self::STACKER_NAME_DECODED_HANDLED . ' ...');
+		$this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_HANDLED, $decodedData);
 	}
 
 	/**
@@ -676,18 +971,18 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 * @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($decodedData, true));
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: decodedData[' . gettype($decodedData) . ']=' . print_r($decodedData, TRUE));
 
 		// And push it on our stack
-		$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECODED_INCOMING, $decodedData);
+		$this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_INCOMING, $decodedData);
 	}
 
 	/**
@@ -695,14 +990,61 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 *
 	 * @return	$isHandled	Whether incoming decoded data is handled
 	 */
-	public function isIncomingDecodedDataHandled () {
+	public function isIncomingRawDataHandled () {
+		// Determine if the stack is not empty
+		$isHandled = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_HANDLED));
+
+		// Return it
+		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->getStackerInstance()->isStackEmpty(self::STACKER_NAME_DECODED_HANDLED));
+		$isHandled = (!$this->getAssemblerInstance()->isPendingDataEmpty());
 
 		// Return it
 		return $isHandled;
 	}
 
+	/**
+	 * Checks whether the assembler has multiple packages pending
+	 *
+	 * @return	$isPending	Whether the assembler has multiple packages pending
+	 */
+	public function ifMultipleMessagesPending () {
+		// Determine if the stack is not empty
+		$isPending = ($this->getAssemblerInstance()->ifMultipleMessagesPending());
+
+		// Return it
+		return $isPending;
+	}
+
+	/**
+	 * 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();
+	}
+
+	/**
+	 * Handles multiple messages.
+	 *
+	 * @return	void
+	 */
+	public function handleMultipleMessages () {
+		// Handle it
+		$this->getAssemblerInstance()->handleMultipleMessages();
+	}
+
 	/**
 	 * Assembles incoming decoded data so it will become an abstract network
 	 * package again. The assembler does later do it's job by an other task,
@@ -712,31 +1054,27 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	public function assembleDecodedDataToPackage () {
 		// Make sure the raw decoded package data is handled
-		assert($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);
+		$packageContent = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECODED_HANDLED);
 
-		// Get a singleton package assembler instance from factory
-		$assemblerInstance = PackageAssemblerFactory::createAssemblerInstance();
+		// Assert on some elements
+		assert(
+			(is_array($packageContent)) &&
+			(isset($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
+			(isset($packageContent[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
+		);
 
 		// 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->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_HANDLED);
 
 		// ... and push it on the 'chunked' stacker
-		$this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECODED_CHUNKED, $packageContent);
-	}
-
-	/**
-	 * Checks whether a new package has arrived
-	 *
-	 * @return	$hasArrived		Whether a new package has arrived for processing
-	 */
-	public function isNewPackageArrived () {
-		// @TODO Add some content here
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Pushing ' . strlen($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA]) . ' bytes on stack ' . self::STACKER_NAME_DECODED_CHUNKED . ',packageContent=' . print_r($packageContent, TRUE));
+		$this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_CHUNKED, $packageContent);
 	}
 
 	/**
@@ -747,26 +1085,29 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	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[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - START');
 
 		// Visit the package
 		$visitorInstance->visitNetworkPackage($this);
 
+		// Then visit the assembler to handle multiple packages
+		$this->getAssemblerInstance()->accept($visitorInstance);
+
 		// Debug message
-		//* NOISY-DEBUG: */ $this->debugOutput('PACKAGE: ' . $visitorInstance->__toString() . ' has visited - FINISHED');
+		/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - FINISHED');
 	}
 
 	/**
-	 * Clears all stacker
+	 * Clears all stacks
 	 *
 	 * @return	void
 	 */
-	public function clearAllStacker () {
+	public function clearAllStacks () {
 		// Call the init method to force re-initialization
-		$this->initStackers(true);
+		$this->initStacks(TRUE);
 
 		// Debug message
-		/* DEBUG: */ $this->debugOutput('PACKAGE: All stacker have been re-initialized.');
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: All stacker have been re-initialized.');
 	}
 
 	/**
@@ -779,7 +1120,7 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 	 */
 	public function removeFirstFailedPackage () {
 		// Get the package again
-		$packageData = $this->getStackerInstance()->getNamed(self::STACKER_NAME_DECLARED);
+		$packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
 
 		// Is the package status 'failed'?
 		if ($packageData[self::PACKAGE_DATA_STATUS] != self::PACKAGE_STATUS_FAILED) {
@@ -788,7 +1129,162 @@ class NetworkPackage extends BaseFrameworkSystem implements Deliverable, Receiva
 		} // END - if
 
 		// Remove this entry
-		$this->getStackerInstance()->popNamed(self::STACKER_NAME_DECLARED);
+		$this->getStackInstance()->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->getStackInstance()->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->getStackInstance()->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->getStackInstance()->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->getStackInstance()->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->getStackInstance()->popNamed(self::STACKER_NAME_PROCESSED_MESSAGE);
+
+		// Add type for later easier handling
+		$messageArray[self::MESSAGE_ARRAY_DATA][self::MESSAGE_ARRAY_TYPE] = $messageArray[self::MESSAGE_ARRAY_TYPE];
+
+		// Debug message
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: messageArray=' . print_r($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);
 	}
 }