3 * A NetworkPackage class. This class implements Deliverable and Receivable
4 * because all network packages should be deliverable to other nodes and
5 * receivable from other nodes. It further provides methods for reading raw
6 * content from template engines and feeding it to the stacker for undeclared
9 * The factory method requires you to provide a compressor class (which must
10 * implement the Compressor interface). If you don't want any compression (not
11 * adviceable due to increased network load), please use the NullCompressor
12 * class and encode it with BASE64 for a more error-free transfer over the
15 * For performance reasons, this class should only be instanciated once and then
16 * used as a "pipe-through" class.
18 * @author Roland Haeder <webmaster@shipsimu.org>
20 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Hub Developer Team
21 * @license GNU GPL 3.0 or any newer version
22 * @link http://www.shipsimu.org
23 * @todo Needs to add functionality for handling the object's type
25 * This program is free software: you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation, either version 3 of the License, or
28 * (at your option) any later version.
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
35 * You should have received a copy of the GNU General Public License
36 * along with this program. If not, see <http://www.gnu.org/licenses/>.
38 class NetworkPackage extends BaseHubSystem implements Deliverable, Receivable, Registerable, Visitable {
40 * Package mask for compressing package data:
41 * 0: Compressor extension
43 * 2: Tags, seperated by semicolons, no semicolon is required if only one tag is needed
47 const PACKAGE_MASK = '%s%s%s%s%s%s%s';
50 * Separator for the above mask
52 const PACKAGE_MASK_SEPARATOR = '^';
55 * Size of an array created by invoking
56 * explode(NetworkPackage::PACKAGE_MASK_SEPARATOR, $content).
58 const PACKAGE_CONTENT_ARRAY_SIZE = 4;
61 * Separator for checksum
63 const PACKAGE_CHECKSUM_SEPARATOR = '_';
66 * Array indexes for above mask, start with zero
68 const INDEX_COMPRESSOR_EXTENSION = 0;
69 const INDEX_PACKAGE_DATA = 1;
71 const INDEX_CHECKSUM = 3;
74 * Array indexes for raw package array
76 const INDEX_PACKAGE_SENDER = 0;
77 const INDEX_PACKAGE_RECIPIENT = 1;
78 const INDEX_PACKAGE_CONTENT = 2;
79 const INDEX_PACKAGE_STATUS = 3;
80 const INDEX_PACKAGE_HASH = 4;
83 * Size of the decoded data array
85 const DECODED_DATA_ARRAY_SIZE = 5;
88 * Named array elements for decoded package content
90 const PACKAGE_CONTENT_EXTENSION = 'compressor';
91 const PACKAGE_CONTENT_MESSAGE = 'message';
92 const PACKAGE_CONTENT_TAGS = 'tags';
93 const PACKAGE_CONTENT_CHECKSUM = 'checksum';
94 const PACKAGE_CONTENT_SENDER = 'sender';
95 const PACKAGE_CONTENT_HASH = 'hash';
98 * Named array elements for package data
100 const PACKAGE_DATA_SENDER = 'sender';
101 const PACKAGE_DATA_RECIPIENT = 'recipient';
102 const PACKAGE_DATA_CONTENT = 'content';
103 const PACKAGE_DATA_STATUS = 'status';
104 const PACKAGE_DATA_HASH = 'hash';
109 const PACKAGE_STATUS_NEW = 'new';
110 const PACKAGE_STATUS_FAILED = 'failed';
111 const PACKAGE_STATUS_DECODED = 'decoded';
112 const PACKAGE_STATUS_FAKED = 'faked';
115 * Constants for message data array
117 const MESSAGE_ARRAY_DATA = 'message_data';
118 const MESSAGE_ARRAY_TYPE = 'message_type';
121 * Generic answer status field
127 const PACKAGE_TAGS_SEPARATOR = ';';
130 * Raw package data separator
132 const PACKAGE_DATA_SEPARATOR = '#';
135 * Separator for more than one recipient
137 const PACKAGE_RECIPIENT_SEPARATOR = ':';
140 * Network target (alias): 'upper nodes'
142 const NETWORK_TARGET_UPPER = 'upper';
145 * Network target (alias): 'self'
147 const NETWORK_TARGET_SELF = 'self';
150 * Network target (alias): 'dht'
152 const NETWORK_TARGET_DHT = 'dht';
155 * TCP package size in bytes
157 const TCP_PACKAGE_SIZE = 512;
159 /**************************************************************************
160 * Stacker for out-going packages *
161 **************************************************************************/
164 * Stacker name for "undeclared" packages
166 const STACKER_NAME_UNDECLARED = 'package_undeclared';
169 * Stacker name for "declared" packages (which are ready to send out)
171 const STACKER_NAME_DECLARED = 'package_declared';
174 * Stacker name for "out-going" packages
176 const STACKER_NAME_OUTGOING = 'package_outgoing';
178 /**************************************************************************
179 * Stacker for incoming packages *
180 **************************************************************************/
183 * Stacker name for "incoming" decoded raw data
185 const STACKER_NAME_DECODED_INCOMING = 'package_decoded_data';
188 * Stacker name for handled decoded raw data
190 const STACKER_NAME_DECODED_HANDLED = 'package_handled_decoded';
193 * Stacker name for "chunked" decoded raw data
195 const STACKER_NAME_DECODED_CHUNKED = 'package_chunked_decoded';
197 /**************************************************************************
198 * Stacker for incoming messages *
199 **************************************************************************/
202 * Stacker name for new messages
204 const STACKER_NAME_NEW_MESSAGE = 'package_new_message';
207 * Stacker name for processed messages
209 const STACKER_NAME_PROCESSED_MESSAGE = 'package_processed_message';
211 /**************************************************************************
212 * Stacker for raw data handling *
213 **************************************************************************/
216 * Stacker for outgoing data stream
218 const STACKER_NAME_OUTGOING_STREAM = 'outgoing_stream';
221 * Array index for final hash
223 const RAW_FINAL_HASH_INDEX = 'hash';
226 * Array index for encoded data
228 const RAW_ENCODED_DATA_INDEX = 'data';
231 * Array index for sent bytes
233 const RAW_SENT_BYTES_INDEX = 'sent';
236 * Array index for socket resource
238 const RAW_SOCKET_INDEX = 'socket';
241 * Array index for buffer size
243 const RAW_BUFFER_SIZE_INDEX = 'buffer';
246 * Array index for diff between buffer and sent bytes
248 const RAW_DIFF_INDEX = 'diff';
250 /**************************************************************************
252 **************************************************************************/
253 const PROTOCOL_TCP = 'TCP';
254 const PROTOCOL_UDP = 'UDP';
257 * Protected constructor
261 protected function __construct () {
262 // Call parent constructor
263 parent::__construct(__CLASS__);
267 * Creates an instance of this class
269 * @param $compressorInstance A Compressor instance for compressing the content
270 * @return $packageInstance An instance of a Deliverable class
272 public static final function createNetworkPackage (Compressor $compressorInstance) {
274 $packageInstance = new NetworkPackage();
276 // Now set the compressor instance
277 $packageInstance->setCompressorInstance($compressorInstance);
280 * We need to initialize a stack here for our packages even for those
281 * which have no recipient address and stamp... ;-) This stacker will
282 * also be used for incoming raw data to handle it.
284 $stackInstance = ObjectFactory::createObjectByConfiguredName('network_package_stacker_class');
286 // At last, set it in this class
287 $packageInstance->setStackInstance($stackInstance);
290 $packageInstance->initStacks();
292 // Get a visitor instance for speeding up things and set it
293 $visitorInstance = ObjectFactory::createObjectByConfiguredName('node_raw_data_monitor_visitor_class');
294 $packageInstance->setVisitorInstance($visitorInstance);
296 // Get crypto instance and set it, too
297 $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
298 $packageInstance->setCryptoInstance($cryptoInstance);
300 // Get a singleton package assembler instance from factory and set it here, too
301 $assemblerInstance = PackageAssemblerFactory::createAssemblerInstance($packageInstance);
302 $packageInstance->setAssemblerInstance($assemblerInstance);
305 $nodeInstance = NodeObjectFactory::createNodeInstance();
307 // Get pool instance from node
308 $poolInstance = $nodeInstance->getListenerPoolInstance();
311 $packageInstance->setListenerPoolInstance($poolInstance);
313 // Return the prepared instance
314 return $packageInstance;
318 * Initialize all stackers
320 * @param $forceReInit Whether to force reinitialization of all stacks
323 protected function initStacks ($forceReInit = FALSE) {
325 $this->getStackInstance()->initStacks(array(
326 self::STACKER_NAME_UNDECLARED,
327 self::STACKER_NAME_DECLARED,
328 self::STACKER_NAME_OUTGOING,
329 self::STACKER_NAME_DECODED_INCOMING,
330 self::STACKER_NAME_DECODED_HANDLED,
331 self::STACKER_NAME_DECODED_CHUNKED,
332 self::STACKER_NAME_NEW_MESSAGE,
333 self::STACKER_NAME_PROCESSED_MESSAGE,
334 self::STACKER_NAME_OUTGOING_STREAM
339 * Determines private key hash from given session id
341 * @param $sessionId Session id
342 * @return $hash Private key's hash
344 private function determineSenderPrivateKeyHash ($sessionId) {
346 $dhtInstance = DhtObjectFactory::createDhtInstance('node');
348 // Ask DHT for session id
349 $senderData = $dhtInstance->findNodeLocalBySessionId($sessionId);
351 // Is an entry found?
352 if (count($senderData) > 0) {
353 // Make sure the element 'private_key_hash' is there
354 /* NOISY-DEBUG */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: senderData=' . print_r($senderData, TRUE));
355 assert(isset($senderData[NodeDistributedHashTableDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH]));
358 return $senderData[NodeDistributedHashTableDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH];
363 * "Getter" for hash from given content
365 * @param $content Raw package content
366 * @return $hash Hash for given package content
368 private function getHashFromContent ($content) {
370 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
373 // @TODO md5() is very weak, but it needs to be fast
376 self::PACKAGE_CHECKSUM_SEPARATOR .
377 $this->getSessionId() .
378 self::PACKAGE_CHECKSUM_SEPARATOR .
379 $this->getCompressorInstance()->getCompressorExtension()
383 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',hash=' . $hash . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
390 * Checks whether the checksum (sometimes called "hash") is the same
392 * @param $decodedContent Package raw content
393 * @param $decodedData Whole raw package data array
394 * @return $isChecksumValid Whether the checksum is the same
396 private function isChecksumValid (array $decodedContent, array $decodedData) {
398 $checksum = $this->getHashFromContentSessionId($decodedContent, $decodedData[self::PACKAGE_DATA_SENDER]);
401 $isChecksumValid = ($checksum == $decodedContent[self::PACKAGE_CONTENT_CHECKSUM]);
404 return $isChecksumValid;
408 * Change the package with given status in given stack
410 * @param $packageData Raw package data in an array
411 * @param $stackerName Name of the stacker
412 * @param $newStatus New status to set
415 private function changePackageStatus (array $packageData, $stackerName, $newStatus) {
416 // Skip this for empty stacks
417 if ($this->getStackInstance()->isStackEmpty($stackerName)) {
418 // This avoids an exception after all packages has failed
422 // Pop the entry (it should be it)
423 $nextData = $this->getStackInstance()->popNamed($stackerName);
425 // Compare both hashes
426 assert($nextData[self::PACKAGE_DATA_HASH] == $packageData[self::PACKAGE_DATA_HASH]);
428 // Temporary set the new status
429 $packageData[self::PACKAGE_DATA_STATUS] = $newStatus;
432 $this->getStackInstance()->pushNamed($stackerName, $packageData);
436 * "Getter" for hash from given content and sender's session id
438 * @param $decodedContent Raw package content
439 * @param $sessionId Session id of the sender
440 * @return $hash Hash for given package content
442 public function getHashFromContentSessionId (array $decodedContent, $sessionId) {
444 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($decodedContent[self::PACKAGE_CONTENT_MESSAGE]) . ',sender=' . $sessionId . ',compressor=' . $decodedContent[self::PACKAGE_CONTENT_EXTENSION]);
447 // @TODO md5() is very weak, but it needs to be fast
449 $decodedContent[self::PACKAGE_CONTENT_MESSAGE] .
450 self::PACKAGE_CHECKSUM_SEPARATOR .
452 self::PACKAGE_CHECKSUM_SEPARATOR .
453 $decodedContent[self::PACKAGE_CONTENT_EXTENSION]
460 ///////////////////////////////////////////////////////////////////////////
461 // Delivering packages / raw data
462 ///////////////////////////////////////////////////////////////////////////
465 * Declares the given raw package data by discovering recipients
467 * @param $packageData Raw package data in an array
470 private function declareRawPackageData (array $packageData) {
471 // Make sure the required field is there
472 assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
475 * We need to disover every recipient, just in case we have a
476 * multi-recipient entry like 'upper' is. 'all' may be a not so good
477 * target because it causes an overload on the network and may be
478 * abused for attacking the network with large packages.
480 $discoveryInstance = PackageDiscoveryFactory::createPackageDiscoveryInstance();
482 // Discover all recipients, this may throw an exception
483 $discoveryInstance->discoverRecipients($packageData);
485 // Now get an iterator
486 $iteratorInstance = $discoveryInstance->getIterator();
488 // Make sure the iterator instance is valid
489 assert($iteratorInstance instanceof Iterator);
491 // Rewind back to the beginning
492 $iteratorInstance->rewind();
494 // ... and begin iteration
495 while ($iteratorInstance->valid()) {
497 $currentRecipient = $iteratorInstance->current();
500 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Setting recipient to ' . $currentRecipient . ',previous=' . $packageData[self::PACKAGE_DATA_RECIPIENT]);
503 $packageData[self::PACKAGE_DATA_RECIPIENT] = $currentRecipient;
505 // Push the declared package to the next stack.
506 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECLARED, $packageData);
509 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package declared for recipient ' . $currentRecipient);
511 // Skip to next entry
512 $iteratorInstance->next();
516 * The recipient list can be cleaned up here because the package which
517 * shall be delivered has already been added for all entries from the
520 $discoveryInstance->clearRecipients();
524 * Delivers raw package data. In short, this will discover the raw socket
525 * resource through a discovery class (which will analyse the receipient of
526 * the package), register the socket with the connection (handler/helper?)
527 * instance and finally push the raw data on our outgoing queue.
529 * @param $packageData Raw package data in an array
532 private function deliverRawPackageData (array $packageData) {
534 * This package may become big, depending on the shared object size or
535 * delivered message size which shouldn't be so long (to save
536 * bandwidth). Because of the nature of the used protocol (TCP) we need
537 * to split it up into smaller pieces to fit it into a TCP frame.
539 * So first we need (again) a discovery class but now a protocol
540 * discovery to choose the right socket resource. The discovery class
541 * should take a look at the raw package data itself and then decide
542 * which (configurable!) protocol should be used for that type of
545 $discoveryInstance = SocketDiscoveryFactory::createSocketDiscoveryInstance();
547 // Now discover the right protocol
548 $socketResource = $discoveryInstance->discoverSocket($packageData, BaseConnectionHelper::CONNECTION_TYPE_OUTGOING);
551 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
554 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: stateInstance=' . $helperInstance->getStateInstance());
555 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
557 // The socket needs to be put in a special registry that can handle such data
558 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
560 // Get the connection helper from registry
561 $helperInstance = Registry::getRegistry()->getInstance('connection');
563 // And make sure it is valid
564 assert($helperInstance instanceof ConnectionHelper);
566 // Get connection info class
567 $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($helperInstance->getProtocolName(), 'helper');
569 // Will the info instance with connection helper data
570 $infoInstance->fillWithConnectionHelperInformation($helperInstance);
573 if ((is_resource($socketResource)) && (!$registryInstance->isSocketRegistered($infoInstance, $socketResource))) {
575 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Registering socket ' . $socketResource . ' ...');
578 $registryInstance->registerSocket($infoInstance, $socketResource, $packageData);
579 } elseif (!$helperInstance->getStateInstance()->isPeerStateConnected()) {
580 // Is not connected, then we cannot send
581 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Unexpected peer state ' . $helperInstance->getStateInstance()->__toString() . ' detected.');
583 // Shutdown the socket
584 $this->shutdownSocket($socketResource);
588 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
590 // Make sure the connection is up
591 $helperInstance->getStateInstance()->validatePeerStateConnected();
594 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after validatePeerStateConnected() has been called.');
596 // Enqueue it again on the out-going queue, the connection is up and working at this point
597 $this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING, $packageData);
600 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after pushNamed() has been called.');
604 * Sends waiting packages
606 * @param $packageData Raw package data
609 private function sendOutgoingRawPackageData (array $packageData) {
613 // Get the right connection instance
614 $infoInstance = SocketRegistryFactory::createSocketRegistryInstance()->getInfoInstanceFromPackageData($packageData);
616 // Test helper instance
617 assert($infoInstance instanceof ShareableInfo);
619 // Get helper instance
620 $helperInstance = $infoInstance->getHelperInstance();
622 // Some sanity-checks on the object
623 //* DEBUG-DIE: */ die('[' . __METHOD__ . ':' . __LINE__ . ']: p1=' . $infoInstance->getProtocolName() . ',p2=' . $helperInstance->getProtocolName() . ',infoInstance=' . print_r($infoInstance, TRUE));
624 assert($helperInstance instanceof ConnectionHelper);
625 assert($infoInstance->getProtocolName() == $helperInstance->getProtocolName());
627 // Is this connection still alive?
628 if ($helperInstance->isShuttedDown()) {
629 // This connection is shutting down
630 // @TODO We may want to do somthing more here?
634 // Sent out package data
635 $helperInstance->sendRawPackageData($packageData);
639 * Generates a secure hash for given raw package content and sender id
641 * @param $content Raw package data
642 * @param $senderId Sender id to generate a hash for
643 * @return $hash Hash as hex-encoded string
645 private function generatePackageHash ($content, $senderId) {
646 // Hash content and sender id together, use scrypt
647 $hash = Scrypt::hashScrypt($senderId . ':' . $content . ':' . $this->determineSenderPrivateKeyHash($senderId));
654 * Checks whether the hash of given package data is 'valid', here that
655 * means it is the same or not.
657 * @param $decodedArray An array with 'decoded' (explode() was mostly called) data
658 * @return $isHashValid Whether the hash is valid
659 * @todo Unfinished area, hashes are currently NOT fully supported
661 private function isPackageHashValid (array $decodedArray) {
663 $isHashValid = Scrypt::checkScrypt($decodedArray[self::INDEX_PACKAGE_SENDER] . ':' . $decodedArray[self::INDEX_PACKAGE_CONTENT] . ':' . $this->determineSenderPrivateKeyHash($decodedArray[self::INDEX_PACKAGE_SENDER]), $decodedArray[self::INDEX_PACKAGE_HASH]);
666 //* DEBUG-DIE: */ die(__METHOD__ . ': isHashValid=' . intval($isHashValid) . chr(10) . ',decodedArray=' . print_r($decodedArray, TRUE));
671 * "Enqueues" raw content into this delivery class by reading the raw content
672 * from given helper's template instance and pushing it on the 'undeclared'
675 * @param $helperInstance An instance of a HubHelper class
678 public function enqueueRawDataFromTemplate (HubHelper $helperInstance) {
680 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
682 // Get the raw content ...
683 $content = $helperInstance->getTemplateInstance()->getRawTemplateData();
684 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('content(' . strlen($content) . ')=' . $content);
686 // ... and compress it
687 $content = $this->getCompressorInstance()->compressStream($content);
689 // Add magic in front of it and hash behind it, including BASE64 encoding
690 $packageContent = sprintf(self::PACKAGE_MASK,
691 // 1.) Compressor's extension
692 $this->getCompressorInstance()->getCompressorExtension(),
694 self::PACKAGE_MASK_SEPARATOR,
695 // 2.) Raw package content, encoded with BASE64
696 base64_encode($content),
698 self::PACKAGE_MASK_SEPARATOR,
700 implode(self::PACKAGE_TAGS_SEPARATOR, $helperInstance->getPackageTags()),
702 self::PACKAGE_MASK_SEPARATOR,
704 $this->getHashFromContent($content)
708 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': Enqueueing package for recipientType=' . $helperInstance->getRecipientType() . ' ...');
710 // Now prepare the temporary array and push it on the 'undeclared' stack
711 $this->getStackInstance()->pushNamed(self::STACKER_NAME_UNDECLARED, array(
712 self::PACKAGE_DATA_SENDER => $this->getSessionId(),
713 self::PACKAGE_DATA_RECIPIENT => $helperInstance->getRecipientType(),
714 self::PACKAGE_DATA_CONTENT => $packageContent,
715 self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_NEW,
716 self::PACKAGE_DATA_HASH => $this->generatePackageHash($packageContent, $this->getSessionId())
720 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
724 * Checks whether a package has been enqueued for delivery.
726 * @return $isEnqueued Whether a package is enqueued
728 public function isPackageEnqueued () {
729 // Check whether the stacker is not empty
730 $isEnqueued = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_UNDECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_UNDECLARED)));
737 * Checks whether a package has been declared
739 * @return $isDeclared Whether a package is declared
741 public function isPackageDeclared () {
742 // Check whether the stacker is not empty
743 $isDeclared = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_DECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECLARED)));
750 * Checks whether a package should be sent out
752 * @return $isWaitingDelivery Whether a package is waiting for delivery
754 public function isPackageWaitingForDelivery () {
755 // Check whether the stacker is not empty
756 $isWaitingDelivery = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING)));
759 return $isWaitingDelivery;
763 * Checks whether encoded (raw) data is pending
765 * @return $isPending Whether encoded data is pending
767 public function isEncodedDataPending () {
768 // Check whether the stacker is not empty
769 $isPending = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING_STREAM)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING_STREAM)));
776 * Delivers an enqueued package to the stated destination. If a non-session
777 * id is provided, recipient resolver is being asked (and instanced once).
778 * This allows that a single package is being delivered to multiple targets
779 * without enqueueing it for every target. If no target is provided or it
780 * can't be determined a NoTargetException is being thrown.
783 * @throws NoTargetException If no target can't be determined
785 public function declareEnqueuedPackage () {
787 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
789 // Make sure this method isn't working if there is no package enqueued
790 if (!$this->isPackageEnqueued()) {
791 // This is not fatal but should be avoided
792 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw package data waiting declaration, but ' . __METHOD__ . ' has been called!');
797 * Now there are for sure packages to deliver, so start with the first
800 $packageData = $this->getStackInstance()->popNamed(self::STACKER_NAME_UNDECLARED);
802 // Declare the raw package data for delivery
803 $this->declareRawPackageData($packageData);
806 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
810 * Delivers the next declared package. Only one package per time will be sent
811 * because this may take time and slows down the whole delivery
816 public function processDeclaredPackage () {
818 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
820 // Sanity check if we have packages declared
821 if (!$this->isPackageDeclared()) {
822 // This is not fatal but should be avoided
823 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No package has been declared, but ' . __METHOD__ . ' has been called!');
828 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
831 assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
833 // Try to deliver the package
835 // And try to send it
836 $this->deliverRawPackageData($packageData);
838 // And remove it finally
839 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECLARED);
840 } catch (InvalidStateException $e) {
841 // The state is not excepected (shall be 'connected')
842 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Caught ' . $e->__toString() . ',message=' . $e->getMessage());
844 // Mark the package with status failed
845 $this->changePackageStatus($packageData, self::STACKER_NAME_DECLARED, self::PACKAGE_STATUS_FAILED);
849 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
853 * Sends waiting packages out for delivery
857 public function sendWaitingPackage () {
859 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
861 // Sanity check if we have packages waiting for delivery
862 if (!$this->isPackageWaitingForDelivery()) {
863 // This is not fatal but should be avoided
864 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No package is waiting for delivery, but ' . __METHOD__ . ' was called.');
869 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_OUTGOING);
872 // Now try to send it
873 $this->sendOutgoingRawPackageData($packageData);
875 // And remove it finally
876 $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING);
877 } catch (InvalidSocketException $e) {
878 // Output exception message
879 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package was not delivered: ' . $e->getMessage());
881 // Mark package as failed
882 $this->changePackageStatus($packageData, self::STACKER_NAME_OUTGOING, self::PACKAGE_STATUS_FAILED);
886 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
890 * Sends out encoded data to a socket
894 public function sendEncodedData () {
896 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
898 // Make sure there is pending encoded data
899 assert($this->isEncodedDataPending());
901 // Pop current data from stack
902 $encodedDataArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING_STREAM);
904 // Init in this round sent bytes
908 assert(is_resource($encodedDataArray[self::RAW_SOCKET_INDEX]));
911 //* 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=' . $encodedDataArray[self::RAW_DIFF_INDEX]);
912 if ($encodedDataArray[self::RAW_DIFF_INDEX] >= 0) {
913 // Send all out (encodedData is smaller than or equal buffer size)
914 //* 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]))));
915 $sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], ($encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - $encodedDataArray[self::RAW_DIFF_INDEX]));
917 // Send buffer size out
918 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: MD5=' . md5(substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], 0, $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX])));
919 $sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX]);
922 // If there was an error, we don't continue here
923 if ($sentBytes === FALSE) {
924 // Handle the error with a faked recipientData array
925 $this->handleSocketError(__METHOD__, __LINE__, $encodedDataArray[self::RAW_SOCKET_INDEX], array('0.0.0.0', '0'));
928 throw new InvalidSocketException(array($this, $encodedDataArray[self::RAW_SOCKET_INDEX], $socketError, $errorMessage), BaseListener::EXCEPTION_INVALID_SOCKET);
929 } elseif (($sentBytes === 0) && (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) > 0)) {
930 // Nothing sent means we are done
931 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
934 // The difference between sent bytes and length of raw data should not go below zero
935 assert((strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) - $sentBytes) >= 0);
937 // Add total sent bytes
938 $encodedDataArray[self::RAW_SENT_BYTES_INDEX] += $sentBytes;
940 // Cut out the last unsent bytes
941 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: Sent out ' . $sentBytes . ' of ' . strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) . ' bytes ...');
942 $encodedDataArray[self::RAW_ENCODED_DATA_INDEX] = substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $sentBytes);
944 // Calculate difference again
945 $encodedDataArray[self::RAW_DIFF_INDEX] = $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]);
948 if (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) <= 0) {
949 // Abort here, all sent!
950 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
955 // Push array back in stack
956 $this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING_STREAM, $encodedDataArray);
959 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
962 ///////////////////////////////////////////////////////////////////////////
963 // Receiving packages / raw data
964 ///////////////////////////////////////////////////////////////////////////
967 * Checks whether decoded raw data is pending
969 * @return $isPending Whether decoded raw data is pending
971 private function isRawDataPending () {
972 // Just return whether the stack is not empty
973 $isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_INCOMING));
980 * Checks whether new raw package data has arrived at a socket
982 * @return $hasArrived Whether new raw package data has arrived for processing
984 public function isNewRawDataPending () {
985 // Visit the pool. This monitors the pool for incoming raw data.
986 $this->getListenerPoolInstance()->accept($this->getVisitorInstance());
988 // Check for new data arrival
989 $hasArrived = $this->isRawDataPending();
996 * Handles the incoming decoded raw data. This method does not "convert" the
997 * decoded data back into a package array, it just "handles" it and pushs it
1002 public function handleIncomingDecodedData () {
1004 * This method should only be called if decoded raw data is pending,
1005 * so check it again.
1007 if (!$this->isRawDataPending()) {
1008 // This is not fatal but should be avoided
1009 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw (decoded?) data is pending, but ' . __METHOD__ . ' has been called!');
1013 // Very noisy debug message:
1014 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Stacker size is ' . $this->getStackInstance()->getStackCount(self::STACKER_NAME_DECODED_INCOMING) . ' entries.');
1016 // "Pop" the next entry (the same array again) from the stack
1017 $decodedData = $this->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_INCOMING);
1019 // Make sure both array elements are there
1021 (is_array($decodedData)) &&
1022 (isset($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
1023 (isset($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
1027 * Also make sure the error code is SOCKET_ERROR_UNHANDLED because we
1028 * only want to handle unhandled packages here.
1030 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: errorCode=' . $decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] . '(' . BaseRawDataHandler::SOCKET_ERROR_UNHANDLED . ')');
1031 assert($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] == BaseRawDataHandler::SOCKET_ERROR_UNHANDLED);
1033 // Remove the last chunk SEPARATOR (because there is no need for it)
1034 if (substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], -1, 1) == PackageFragmenter::CHUNK_SEPARATOR) {
1035 // It is there and should be removed
1036 $decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA] = substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], 0, -1);
1039 // This package is "handled" and can be pushed on the next stack
1040 //* 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 . ' ...');
1041 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_HANDLED, $decodedData);
1045 * Adds raw decoded data from the given handler instance to this receiver
1047 * @param $handlerInstance An instance of a Networkable class
1050 public function addRawDataToIncomingStack (Networkable $handlerInstance) {
1052 * Get the decoded data from the handler, this is an array with
1053 * 'raw_data' and 'error_code' as elements.
1055 $decodedData = $handlerInstance->getNextRawData();
1057 // Very noisy debug message:
1058 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: decodedData[' . gettype($decodedData) . ']=' . print_r($decodedData, TRUE));
1060 // And push it on our stack
1061 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_INCOMING, $decodedData);
1065 * Checks whether incoming decoded data is handled.
1067 * @return $isHandled Whether incoming decoded data is handled
1069 public function isIncomingRawDataHandled () {
1070 // Determine if the stack is not empty
1071 $isHandled = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_HANDLED));
1078 * Checks whether the assembler has pending data left
1080 * @return $isHandled Whether the assembler has pending data left
1082 public function ifAssemblerHasPendingDataLeft () {
1083 // Determine if the stack is not empty
1084 $isHandled = (!$this->getAssemblerInstance()->isPendingDataEmpty());
1091 * Checks whether the assembler has multiple packages pending
1093 * @return $isPending Whether the assembler has multiple packages pending
1095 public function ifMultipleMessagesPending () {
1096 // Determine if the stack is not empty
1097 $isPending = ($this->getAssemblerInstance()->ifMultipleMessagesPending());
1104 * Handles the attached assemler's pending data queue to be finally
1105 * assembled to the raw package data back.
1109 public function handleAssemblerPendingData () {
1111 $this->getAssemblerInstance()->handlePendingData();
1115 * Handles multiple messages.
1119 public function handleMultipleMessages () {
1121 $this->getAssemblerInstance()->handleMultipleMessages();
1125 * Assembles incoming decoded data so it will become an abstract network
1126 * package again. The assembler does later do it's job by an other task,
1127 * not this one to keep best speed possible.
1131 public function assembleDecodedDataToPackage () {
1132 // Make sure the raw decoded package data is handled
1133 assert($this->isIncomingRawDataHandled());
1135 // Get current package content (an array with two elements; see handleIncomingDecodedData() for details)
1136 $packageContent = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECODED_HANDLED);
1138 // Assert on some elements
1140 (is_array($packageContent)) &&
1141 (isset($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
1142 (isset($packageContent[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
1145 // Start assembling the raw package data array by chunking it
1146 $this->getAssemblerInstance()->chunkPackageContent($packageContent);
1148 // Remove the package from 'handled_decoded' stack ...
1149 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_HANDLED);
1151 // ... and push it on the 'chunked' stacker
1152 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Pushing ' . strlen($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA]) . ' bytes on stack ' . self::STACKER_NAME_DECODED_CHUNKED . ',packageContent=' . print_r($packageContent, TRUE));
1153 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_CHUNKED, $packageContent);
1157 * Accepts the visitor to process the visit "request"
1159 * @param $visitorInstance An instance of a Visitor class
1162 public function accept (Visitor $visitorInstance) {
1164 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - CALLED!');
1166 // Visit the package
1167 $visitorInstance->visitNetworkPackage($this);
1169 // Then visit the assembler to handle multiple packages
1170 $this->getAssemblerInstance()->accept($visitorInstance);
1173 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - EXIT!');
1181 public function clearAllStacks () {
1182 // Call the init method to force re-initialization
1183 $this->initStacks(TRUE);
1186 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: All stacker have been re-initialized.');
1190 * Removes the first failed outoging package from the stack to continue
1191 * with next one (it will never work until the issue is fixed by you).
1194 * @throws UnexpectedPackageStatusException If the package status is not 'failed'
1195 * @todo This may be enchanced for outgoing packages?
1197 public function removeFirstFailedPackage () {
1198 // Get the package again
1199 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
1201 // Is the package status 'failed'?
1202 if ($packageData[self::PACKAGE_DATA_STATUS] != self::PACKAGE_STATUS_FAILED) {
1204 throw new UnexpectedPackageStatusException(array($this, $packageData, self::PACKAGE_STATUS_FAILED), BaseListener::EXCEPTION_UNEXPECTED_PACKAGE_STATUS);
1207 // Remove this entry
1208 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECLARED);
1212 * "Decode" the package content into the same array when it was sent.
1214 * @param $rawPackageContent The raw package content to be "decoded"
1215 * @return $decodedData An array with 'sender', 'recipient', 'content' and 'status' elements
1217 public function decodeRawContent ($rawPackageContent) {
1218 // Use the separator '#' to "decode" it
1219 $decodedArray = explode(self::PACKAGE_DATA_SEPARATOR, $rawPackageContent);
1221 // Assert on count (should be always 3)
1222 assert(count($decodedArray) == self::DECODED_DATA_ARRAY_SIZE);
1224 // Generate the hash of comparing it
1225 if (!$this->isPackageHashValid($decodedArray)) {
1226 // Is not valid, so throw an exception here
1227 exit(__METHOD__ . ':INVALID HASH! UNDER CONSTRUCTION!' . chr(10));
1231 * Create 'decodedData' array with all assoziative array elements.
1233 $decodedData = array(
1234 self::PACKAGE_DATA_SENDER => $decodedArray[self::INDEX_PACKAGE_SENDER],
1235 self::PACKAGE_DATA_RECIPIENT => $decodedArray[self::INDEX_PACKAGE_RECIPIENT],
1236 self::PACKAGE_DATA_CONTENT => $decodedArray[self::INDEX_PACKAGE_CONTENT],
1237 self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_DECODED,
1238 self::PACKAGE_DATA_HASH => $decodedArray[self::INDEX_PACKAGE_HASH]
1242 return $decodedData;
1246 * Handles decoded data for this node by "decoding" the 'content' part of
1247 * it. Again this method uses explode() for the "decoding" process.
1249 * @param $decodedData An array with decoded raw package data
1251 * @throws InvalidDataChecksumException If the checksum doesn't match
1253 public function handleRawData (array $decodedData) {
1255 * "Decode" the package's content by a simple explode() call, for
1256 * details of the array elements, see comments for constant
1259 $decodedContent = explode(self::PACKAGE_MASK_SEPARATOR, $decodedData[self::PACKAGE_DATA_CONTENT]);
1261 // Assert on array count for a very basic validation
1262 assert(count($decodedContent) == self::PACKAGE_CONTENT_ARRAY_SIZE);
1265 * Convert the indexed array into an associative array. This is much
1266 * better to remember than plain numbers, isn't it?
1268 $decodedContent = array(
1269 // Compressor's extension used to compress the data
1270 self::PACKAGE_CONTENT_EXTENSION => $decodedContent[self::INDEX_COMPRESSOR_EXTENSION],
1271 // Package data (aka "message") in BASE64-decoded form but still compressed
1272 self::PACKAGE_CONTENT_MESSAGE => base64_decode($decodedContent[self::INDEX_PACKAGE_DATA]),
1273 // Tags as an indexed array for "tagging" the message
1274 self::PACKAGE_CONTENT_TAGS => explode(self::PACKAGE_TAGS_SEPARATOR, $decodedContent[self::INDEX_TAGS]),
1275 // Checksum of the _decoded_ data
1276 self::PACKAGE_CONTENT_CHECKSUM => $decodedContent[self::INDEX_CHECKSUM],
1278 self::PACKAGE_CONTENT_SENDER => $decodedData[self::PACKAGE_DATA_SENDER],
1279 // Hash from decoded raw data
1280 self::PACKAGE_CONTENT_HASH => $decodedData[self::PACKAGE_DATA_HASH]
1283 // Is the checksum valid?
1284 if (!$this->isChecksumValid($decodedContent, $decodedData)) {
1285 // Is not the same, so throw an exception here
1286 throw new InvalidDataChecksumException(array($this, $decodedContent, $decodedData), BaseListener::EXCEPTION_INVALID_DATA_CHECKSUM);
1290 * The checksum is the same, then it can be decompressed safely. The
1291 * original message is at this point fully decoded.
1293 $decodedContent[self::PACKAGE_CONTENT_MESSAGE] = $this->getCompressorInstance()->decompressStream($decodedContent[self::PACKAGE_CONTENT_MESSAGE]);
1295 // And push it on the next stack
1296 $this->getStackInstance()->pushNamed(self::STACKER_NAME_NEW_MESSAGE, $decodedContent);
1300 * Checks whether a new message has arrived
1302 * @return $hasArrived Whether a new message has arrived for processing
1304 public function isNewMessageArrived () {
1305 // Determine if the stack is not empty
1306 $hasArrived = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_NEW_MESSAGE));
1313 * Handles newly arrived messages
1316 * @todo Implement verification of all sent tags here?
1318 public function handleNewlyArrivedMessage () {
1319 // Get it from the stacker, it is the full array with the decoded message
1320 $decodedContent = $this->getStackInstance()->popNamed(self::STACKER_NAME_NEW_MESSAGE);
1322 // Now get a filter chain back from factory with given tags array
1323 $chainInstance = PackageFilterChainFactory::createChainByTagsArray($decodedContent[self::PACKAGE_CONTENT_TAGS]);
1326 * Process the message through all filters, note that all other
1327 * elements from $decodedContent are no longer needed.
1329 $chainInstance->processMessage($decodedContent, $this);
1333 * Checks whether a processed message is pending for "interpretation"
1335 * @return $isPending Whether a processed message is pending
1337 public function isProcessedMessagePending () {
1339 $isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_PROCESSED_MESSAGE));
1346 * Handle processed messages by "interpreting" the 'message_type' element
1350 public function handleProcessedMessage () {
1351 // Get it from the stacker, it is the full array with the processed message
1352 $messageArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_PROCESSED_MESSAGE);
1354 // Add type for later easier handling
1355 $messageArray[self::MESSAGE_ARRAY_DATA][self::MESSAGE_ARRAY_TYPE] = $messageArray[self::MESSAGE_ARRAY_TYPE];
1358 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: messageArray=' . print_r($messageArray, TRUE));
1360 // Create a handler instance from given message type
1361 $handlerInstance = MessageTypeHandlerFactory::createMessageTypeHandlerInstance($messageArray[self::MESSAGE_ARRAY_TYPE]);
1363 // Handle message data
1364 $handlerInstance->handleMessageData($messageArray[self::MESSAGE_ARRAY_DATA], $this);
1368 * Feeds the hash and sender (as recipient for the 'sender' reward) to the
1369 * miner's queue, unless the message is not a "reward claim" message as this
1370 * leads to an endless loop. You may wish to run the miner to get some
1371 * reward ("HubCoins") for "mining" this hash.
1373 * @param $decodedDataArray Array with decoded message
1377 public function feedHashToMiner (array $decodedDataArray) {
1378 // Make sure the required elements are there
1379 assert(isset($decodedDataArray[self::PACKAGE_CONTENT_SENDER]));
1380 assert(isset($decodedDataArray[self::PACKAGE_CONTENT_HASH]));
1381 assert(isset($decodedDataArray[self::PACKAGE_CONTENT_TAGS]));
1383 // Resolve session id ('sender' is a session id) into node id
1384 $nodeId = HubTools::resolveNodeIdBySessionId($decodedDataArray[self::PACKAGE_CONTENT_SENDER]);
1386 // Is 'claim_reward' the message type?
1387 if (in_array('claim_reward', $decodedDataArray[self::PACKAGE_CONTENT_TAGS])) {
1389 * Then don't feed this message to the miner as this causes and
1390 * endless loop of mining.
1395 $this->partialStub('@TODO nodeId=' . $nodeId . ',decodedDataArray=' . print_r($decodedDataArray, TRUE));