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;
81 const INDEX_PACKAGE_PRIVATE_KEY_HASH = 5;
84 * Size of the decoded data array
86 const DECODED_DATA_ARRAY_SIZE = 6;
89 * Named array elements for decoded package content
91 const PACKAGE_CONTENT_EXTENSION = 'compressor';
92 const PACKAGE_CONTENT_MESSAGE = 'message';
93 const PACKAGE_CONTENT_TAGS = 'tags';
94 const PACKAGE_CONTENT_CHECKSUM = 'checksum';
95 const PACKAGE_CONTENT_SENDER = 'sender';
96 const PACKAGE_CONTENT_HASH = 'hash';
97 const PACKAGE_CONTENT_PRIVATE_KEY_HASH = 'pkhash';
100 * Named array elements for package data
102 const PACKAGE_DATA_SENDER = 'sender';
103 const PACKAGE_DATA_RECIPIENT = 'recipient';
104 const PACKAGE_DATA_CONTENT = 'content';
105 const PACKAGE_DATA_STATUS = 'status';
106 const PACKAGE_DATA_HASH = 'hash';
107 const PACKAGE_DATA_PRIVATE_KEY_HASH = 'pkhash';
112 const PACKAGE_STATUS_NEW = 'new';
113 const PACKAGE_STATUS_FAILED = 'failed';
114 const PACKAGE_STATUS_DECODED = 'decoded';
115 const PACKAGE_STATUS_FAKED = 'faked';
118 * Constants for message data array
120 const MESSAGE_ARRAY_DATA = 'message_data';
121 const MESSAGE_ARRAY_TYPE = 'message_type';
122 const MESSAGE_ARRAY_SENDER = 'message_sender';
123 const MESSAGE_ARRAY_HASH = 'message_hash';
124 const MESSAGE_ARRAY_TAGS = 'message_tags';
127 * Generic answer status field
133 const PACKAGE_TAGS_SEPARATOR = ';';
136 * Raw package data separator
138 const PACKAGE_DATA_SEPARATOR = '#';
141 * Separator for more than one recipient
143 const PACKAGE_RECIPIENT_SEPARATOR = ':';
146 * Network target (alias): 'upper nodes'
148 const NETWORK_TARGET_UPPER = 'upper';
151 * Network target (alias): 'self'
153 const NETWORK_TARGET_SELF = 'self';
156 * Network target (alias): 'dht'
158 const NETWORK_TARGET_DHT = 'dht';
161 * TCP package size in bytes
163 const TCP_PACKAGE_SIZE = 512;
165 /**************************************************************************
166 * Stacker for out-going packages *
167 **************************************************************************/
170 * Stacker name for "undeclared" packages
172 const STACKER_NAME_UNDECLARED = 'package_undeclared';
175 * Stacker name for "declared" packages (which are ready to send out)
177 const STACKER_NAME_DECLARED = 'package_declared';
180 * Stacker name for "out-going" packages
182 const STACKER_NAME_OUTGOING = 'package_outgoing';
184 /**************************************************************************
185 * Stacker for incoming packages *
186 **************************************************************************/
189 * Stacker name for "incoming" decoded raw data
191 const STACKER_NAME_DECODED_INCOMING = 'package_decoded_data';
194 * Stacker name for handled decoded raw data
196 const STACKER_NAME_DECODED_HANDLED = 'package_handled_decoded';
199 * Stacker name for "chunked" decoded raw data
201 const STACKER_NAME_DECODED_CHUNKED = 'package_chunked_decoded';
203 /**************************************************************************
204 * Stacker for incoming messages *
205 **************************************************************************/
208 * Stacker name for new messages
210 const STACKER_NAME_NEW_MESSAGE = 'package_new_message';
213 * Stacker name for processed messages
215 const STACKER_NAME_PROCESSED_MESSAGE = 'package_processed_message';
217 /**************************************************************************
218 * Stacker for raw data handling *
219 **************************************************************************/
222 * Stacker for outgoing data stream
224 const STACKER_NAME_OUTGOING_STREAM = 'outgoing_stream';
227 * Array index for final hash
229 const RAW_FINAL_HASH_INDEX = 'hash';
232 * Array index for encoded data
234 const RAW_ENCODED_DATA_INDEX = 'data';
237 * Array index for sent bytes
239 const RAW_SENT_BYTES_INDEX = 'sent';
242 * Array index for socket resource
244 const RAW_SOCKET_INDEX = 'socket';
247 * Array index for buffer size
249 const RAW_BUFFER_SIZE_INDEX = 'buffer';
252 * Array index for diff between buffer and sent bytes
254 const RAW_DIFF_INDEX = 'diff';
256 /**************************************************************************
258 **************************************************************************/
259 const PROTOCOL_TCP = 'TCP';
260 const PROTOCOL_UDP = 'UDP';
263 * Protected constructor
267 protected function __construct () {
268 // Call parent constructor
269 parent::__construct(__CLASS__);
273 * Creates an instance of this class
275 * @param $compressorInstance A Compressor instance for compressing the content
276 * @return $packageInstance An instance of a Deliverable class
278 public static final function createNetworkPackage (Compressor $compressorInstance) {
280 $packageInstance = new NetworkPackage();
282 // Now set the compressor instance
283 $packageInstance->setCompressorInstance($compressorInstance);
286 * We need to initialize a stack here for our packages even for those
287 * which have no recipient address and stamp... ;-) This stacker will
288 * also be used for incoming raw data to handle it.
290 $stackInstance = ObjectFactory::createObjectByConfiguredName('network_package_stacker_class');
292 // At last, set it in this class
293 $packageInstance->setStackInstance($stackInstance);
296 $packageInstance->initStacks();
298 // Get a visitor instance for speeding up things and set it
299 $visitorInstance = ObjectFactory::createObjectByConfiguredName('node_raw_data_monitor_visitor_class');
300 $packageInstance->setVisitorInstance($visitorInstance);
302 // Get crypto instance and set it, too
303 $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
304 $packageInstance->setCryptoInstance($cryptoInstance);
306 // Get a singleton package assembler instance from factory and set it here, too
307 $assemblerInstance = PackageAssemblerFactory::createAssemblerInstance($packageInstance);
308 $packageInstance->setAssemblerInstance($assemblerInstance);
311 $nodeInstance = NodeObjectFactory::createNodeInstance();
313 // Get pool instance from node
314 $poolInstance = $nodeInstance->getListenerPoolInstance();
317 $packageInstance->setListenerPoolInstance($poolInstance);
319 // Return the prepared instance
320 return $packageInstance;
324 * Initialize all stackers
326 * @param $forceReInit Whether to force reinitialization of all stacks
329 protected function initStacks ($forceReInit = FALSE) {
331 $this->getStackInstance()->initStacks(array(
332 self::STACKER_NAME_UNDECLARED,
333 self::STACKER_NAME_DECLARED,
334 self::STACKER_NAME_OUTGOING,
335 self::STACKER_NAME_DECODED_INCOMING,
336 self::STACKER_NAME_DECODED_HANDLED,
337 self::STACKER_NAME_DECODED_CHUNKED,
338 self::STACKER_NAME_NEW_MESSAGE,
339 self::STACKER_NAME_PROCESSED_MESSAGE,
340 self::STACKER_NAME_OUTGOING_STREAM
345 * Determines private key hash from given session id
347 * @param $decodedData Array with decoded data
348 * @return $hash Private key's hash
350 private function determineSenderPrivateKeyHash (array $decodedData) {
352 $dhtInstance = DhtObjectFactory::createDhtInstance('node');
354 // Ask DHT for session id
355 $senderData = $dhtInstance->findNodeLocalBySessionId($decodedData[self::PACKAGE_CONTENT_SENDER]);
357 // Is an entry found?
358 if (count($senderData) > 0) {
359 // Make sure the element 'private_key_hash' is there
360 //* NOISY-DEBUG */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: senderData=' . print_r($senderData, TRUE));
361 assert(isset($senderData[NodeDistributedHashTableDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH]));
363 // Don't accept empty hashes
364 if (empty($senderData[NodeDistributedHashTableDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH])) {
366 die('[' . __METHOD__ . ':' . __LINE__ . ':] Empty private key hash: senderData=' . print_r($senderData, TRUE));
370 return $senderData[NodeDistributedHashTableDatabaseWrapper::DB_COLUMN_PRIVATE_KEY_HASH];
373 // Make sure the requested element is there
374 //* DEBUG-DIE */ die('decodedData=' . print_r($decodedData, TRUE));
375 assert(isset($decodedData[self::PACKAGE_CONTENT_PRIVATE_KEY_HASH]));
377 // Don't accept empty keys
378 if (empty($decodedData[self::PACKAGE_CONTENT_PRIVATE_KEY_HASH])) {
380 die('[' . __METHOD__ . ':' . __LINE__ . ':] Empty private key hash: decodedData=' . print_r($decodedData, TRUE));
383 // There is no DHT entry so, accept the hash from decoded data
384 return $decodedData[self::PACKAGE_CONTENT_PRIVATE_KEY_HASH];
388 * "Getter" for hash from given content
390 * @param $content Raw package content
391 * @return $hash Hash for given package content
393 private function getHashFromContent ($content) {
395 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
398 // @TODO md5() is very weak, but it needs to be fast
401 self::PACKAGE_CHECKSUM_SEPARATOR .
402 $this->getSessionId() .
403 self::PACKAGE_CHECKSUM_SEPARATOR .
404 $this->getCompressorInstance()->getCompressorExtension()
408 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',hash=' . $hash . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
415 * Checks whether the checksum (sometimes called "hash") is the same
417 * @param $decodedContent Package raw content
418 * @param $decodedData Whole raw package data array
419 * @return $isChecksumValid Whether the checksum is the same
421 private function isChecksumValid (array $decodedContent, array $decodedData) {
423 $checksum = $this->getHashFromContentSessionId($decodedContent, $decodedData[self::PACKAGE_DATA_SENDER]);
426 $isChecksumValid = ($checksum == $decodedContent[self::PACKAGE_CONTENT_CHECKSUM]);
429 return $isChecksumValid;
433 * Change the package with given status in given stack
435 * @param $packageData Raw package data in an array
436 * @param $stackerName Name of the stacker
437 * @param $newStatus New status to set
440 private function changePackageStatus (array $packageData, $stackerName, $newStatus) {
441 // Skip this for empty stacks
442 if ($this->getStackInstance()->isStackEmpty($stackerName)) {
443 // This avoids an exception after all packages has failed
447 // Pop the entry (it should be it)
448 $nextData = $this->getStackInstance()->popNamed($stackerName);
450 // Compare both hashes
451 assert($nextData[self::PACKAGE_DATA_HASH] == $packageData[self::PACKAGE_DATA_HASH]);
453 // Temporary set the new status
454 $packageData[self::PACKAGE_DATA_STATUS] = $newStatus;
457 $this->getStackInstance()->pushNamed($stackerName, $packageData);
461 * "Getter" for hash from given content and sender's session id
463 * @param $decodedContent Raw package content
464 * @param $sessionId Session id of the sender
465 * @return $hash Hash for given package content
467 public function getHashFromContentSessionId (array $decodedContent, $sessionId) {
469 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($decodedContent[self::PACKAGE_CONTENT_MESSAGE]) . ',sender=' . $sessionId . ',compressor=' . $decodedContent[self::PACKAGE_CONTENT_EXTENSION]);
472 // @TODO md5() is very weak, but it needs to be fast
474 $decodedContent[self::PACKAGE_CONTENT_MESSAGE] .
475 self::PACKAGE_CHECKSUM_SEPARATOR .
477 self::PACKAGE_CHECKSUM_SEPARATOR .
478 $decodedContent[self::PACKAGE_CONTENT_EXTENSION]
485 ///////////////////////////////////////////////////////////////////////////
486 // Delivering packages / raw data
487 ///////////////////////////////////////////////////////////////////////////
490 * Declares the given raw package data by discovering recipients
492 * @param $packageData Raw package data in an array
495 private function declareRawPackageData (array $packageData) {
496 // Make sure the required field is there
497 assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
500 * We need to disover every recipient, just in case we have a
501 * multi-recipient entry like 'upper' is. 'all' may be a not so good
502 * target because it causes an overload on the network and may be
503 * abused for attacking the network with large packages.
505 $discoveryInstance = PackageDiscoveryFactory::createPackageDiscoveryInstance();
507 // Discover all recipients, this may throw an exception
508 $discoveryInstance->discoverRecipients($packageData);
510 // Now get an iterator
511 $iteratorInstance = $discoveryInstance->getIterator();
513 // Make sure the iterator instance is valid
514 assert($iteratorInstance instanceof Iterator);
516 // Rewind back to the beginning
517 $iteratorInstance->rewind();
519 // ... and begin iteration
520 while ($iteratorInstance->valid()) {
522 $currentRecipient = $iteratorInstance->current();
525 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Setting recipient to ' . $currentRecipient . ',previous=' . $packageData[self::PACKAGE_DATA_RECIPIENT]);
528 $packageData[self::PACKAGE_DATA_RECIPIENT] = $currentRecipient;
530 // Push the declared package to the next stack.
531 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECLARED, $packageData);
534 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package declared for recipient ' . $currentRecipient);
536 // Skip to next entry
537 $iteratorInstance->next();
541 * The recipient list can be cleaned up here because the package which
542 * shall be delivered has already been added for all entries from the
545 $discoveryInstance->clearRecipients();
549 * Delivers raw package data. In short, this will discover the raw socket
550 * resource through a discovery class (which will analyse the receipient of
551 * the package), register the socket with the connection (handler/helper?)
552 * instance and finally push the raw data on our outgoing queue.
554 * @param $packageData Raw package data in an array
557 private function deliverRawPackageData (array $packageData) {
559 * This package may become big, depending on the shared object size or
560 * delivered message size which shouldn't be so long (to save
561 * bandwidth). Because of the nature of the used protocol (TCP) we need
562 * to split it up into smaller pieces to fit it into a TCP frame.
564 * So first we need (again) a discovery class but now a protocol
565 * discovery to choose the right socket resource. The discovery class
566 * should take a look at the raw package data itself and then decide
567 * which (configurable!) protocol should be used for that type of
570 $discoveryInstance = SocketDiscoveryFactory::createSocketDiscoveryInstance();
572 // Now discover the right protocol
573 $socketResource = $discoveryInstance->discoverSocket($packageData, BaseConnectionHelper::CONNECTION_TYPE_OUTGOING);
576 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
579 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: stateInstance=' . $helperInstance->getStateInstance());
580 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
582 // The socket needs to be put in a special registry that can handle such data
583 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
585 // Get the connection helper from registry
586 $helperInstance = Registry::getRegistry()->getInstance('connection');
588 // And make sure it is valid
589 assert($helperInstance instanceof ConnectionHelper);
591 // Get connection info class
592 $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($helperInstance->getProtocolName(), 'helper');
594 // Will the info instance with connection helper data
595 $infoInstance->fillWithConnectionHelperInformation($helperInstance);
598 if ((is_resource($socketResource)) && (!$registryInstance->isSocketRegistered($infoInstance, $socketResource))) {
600 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Registering socket ' . $socketResource . ' ...');
603 $registryInstance->registerSocket($infoInstance, $socketResource, $packageData);
604 } elseif (!$helperInstance->getStateInstance()->isPeerStateConnected()) {
605 // Is not connected, then we cannot send
606 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Unexpected peer state ' . $helperInstance->getStateInstance()->__toString() . ' detected.');
608 // Shutdown the socket
609 $this->shutdownSocket($socketResource);
613 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
615 // Make sure the connection is up
616 $helperInstance->getStateInstance()->validatePeerStateConnected();
619 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after validatePeerStateConnected() has been called.');
621 // Enqueue it again on the out-going queue, the connection is up and working at this point
622 $this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING, $packageData);
625 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after pushNamed() has been called.');
629 * Sends waiting packages
631 * @param $packageData Raw package data
634 private function sendOutgoingRawPackageData (array $packageData) {
638 // Get the right connection instance
639 $infoInstance = SocketRegistryFactory::createSocketRegistryInstance()->getInfoInstanceFromPackageData($packageData);
641 // Test helper instance
642 assert($infoInstance instanceof ShareableInfo);
644 // Get helper instance
645 $helperInstance = $infoInstance->getHelperInstance();
647 // Some sanity-checks on the object
648 //* DEBUG-DIE: */ die('[' . __METHOD__ . ':' . __LINE__ . ']: p1=' . $infoInstance->getProtocolName() . ',p2=' . $helperInstance->getProtocolName() . ',infoInstance=' . print_r($infoInstance, TRUE));
649 assert($helperInstance instanceof ConnectionHelper);
650 assert($infoInstance->getProtocolName() == $helperInstance->getProtocolName());
652 // Is this connection still alive?
653 if ($helperInstance->isShuttedDown()) {
654 // This connection is shutting down
655 // @TODO We may want to do somthing more here?
659 // Sent out package data
660 $helperInstance->sendRawPackageData($packageData);
664 * Generates a secure hash for given raw package content and sender id
666 * @param $content Raw package data
667 * @param $senderId Sender id to generate a hash for
668 * @return $hash Hash as hex-encoded string
670 private function generatePackageHash ($content, $senderId) {
672 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content()=' . strlen($content) . ',senderId=' . $senderId . ' - CALLED!');
674 // Is the feature enabled?
675 if (!FrameworkFeature::isFeatureAvailable('hubcoin_reward')) {
676 // Feature is not enabled
677 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Feature "hubcoin_reward" not available, not generating package hash. Returning NULL ...');
683 self::PACKAGE_CONTENT_SENDER => $senderId,
684 self::PACKAGE_CONTENT_MESSAGE => $content,
685 self::PACKAGE_CONTENT_PRIVATE_KEY_HASH => ''
688 // Hash content and sender id together, use scrypt
689 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: senderId=' . $senderId . ',content()=' . strlen($content));
690 $hash = FrameworkFeature::callFeature('hubcoin_reward', 'generateHash', array($senderId . ':' . $content . ':' . $this->determineSenderPrivateKeyHash($data)));
693 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: hash=' . $hash . ' - EXIT!');
700 * Checks whether the hash of given package data is 'valid', here that
701 * means it is the same or not.
703 * @param $decodedArray An array with 'decoded' (explode() was mostly called) data
704 * @return $isHashValid Whether the hash is valid
705 * @todo Unfinished area, hashes are currently NOT fully supported
707 private function isPackageHashValid (array $decodedArray) {
709 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: decodedArray=' . print_r($decodedArray, TRUE) . ' - CALLED!');
711 // Make sure the required array elements are there
712 assert(isset($decodedArray[self::PACKAGE_CONTENT_SENDER]));
713 assert(isset($decodedArray[self::PACKAGE_CONTENT_MESSAGE]));
714 assert(isset($decodedArray[self::PACKAGE_CONTENT_HASH]));
715 assert(isset($decodedArray[self::PACKAGE_CONTENT_PRIVATE_KEY_HASH]));
717 // Is the feature enabled?
718 if (!FrameworkFeature::isFeatureAvailable('hubcoin_reward')) {
719 // Feature is not enabled, so hashes are always valid
720 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Feature "hubcoin_reward" not available, not checking hash. Returning TRUE ...');
725 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: senderId=' . $decodedArray[self::PACKAGE_CONTENT_SENDER] . ',message()=' . strlen($decodedArray[self::PACKAGE_CONTENT_MESSAGE]) . ',hash=' . $decodedArray[self::PACKAGE_CONTENT_HASH]);
726 //* DEBUG-DIE: */ die(__METHOD__ . ': decodedArray=' . print_r($decodedArray, TRUE));
727 $isHashValid = FrameworkFeature::callFeature('hubcoin_reward', 'checkHash', array($decodedArray[self::PACKAGE_CONTENT_SENDER] . ':' . $decodedArray[self::PACKAGE_CONTENT_MESSAGE] . ':' . $this->determineSenderPrivateKeyHash($decodedArray), $decodedArray[self::PACKAGE_CONTENT_HASH]));
730 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: isHashValid=' . intval($isHashValid) . ' - EXIT!');
735 * "Enqueues" raw content into this delivery class by reading the raw content
736 * from given helper's template instance and pushing it on the 'undeclared'
739 * @param $helperInstance An instance of a HubHelper class
742 public function enqueueRawDataFromTemplate (HubHelper $helperInstance) {
744 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
746 // Get the raw content ...
747 $content = $helperInstance->getTemplateInstance()->getRawTemplateData();
748 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('content(' . strlen($content) . ')=' . $content);
750 // ... and compress it
751 $compressed = $this->getCompressorInstance()->compressStream($content);
753 // Add magic in front of it and hash behind it, including BASE64 encoding
754 $packageContent = sprintf(self::PACKAGE_MASK,
755 // 1.) Compressor's extension
756 $this->getCompressorInstance()->getCompressorExtension(),
758 self::PACKAGE_MASK_SEPARATOR,
759 // 2.) Compressed raw package content, encoded with BASE64
760 base64_encode($compressed),
762 self::PACKAGE_MASK_SEPARATOR,
764 implode(self::PACKAGE_TAGS_SEPARATOR, $helperInstance->getPackageTags()),
766 self::PACKAGE_MASK_SEPARATOR,
768 $this->getHashFromContent($compressed)
772 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': Enqueueing package for recipientType=' . $helperInstance->getRecipientType() . ' ...');
774 // Now prepare the temporary array and push it on the 'undeclared' stack
775 $this->getStackInstance()->pushNamed(self::STACKER_NAME_UNDECLARED, array(
776 self::PACKAGE_DATA_SENDER => $this->getSessionId(),
777 self::PACKAGE_DATA_RECIPIENT => $helperInstance->getRecipientType(),
778 self::PACKAGE_DATA_CONTENT => $packageContent,
779 self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_NEW,
780 self::PACKAGE_DATA_HASH => $this->generatePackageHash($content, $this->getSessionId()),
781 self::PACKAGE_DATA_PRIVATE_KEY_HASH => $this->getPrivateKeyHash(),
785 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
789 * Checks whether a package has been enqueued for delivery.
791 * @return $isEnqueued Whether a package is enqueued
793 public function isPackageEnqueued () {
794 // Check whether the stacker is not empty
795 $isEnqueued = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_UNDECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_UNDECLARED)));
802 * Checks whether a package has been declared
804 * @return $isDeclared Whether a package is declared
806 public function isPackageDeclared () {
807 // Check whether the stacker is not empty
808 $isDeclared = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_DECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECLARED)));
815 * Checks whether a package should be sent out
817 * @return $isWaitingDelivery Whether a package is waiting for delivery
819 public function isPackageWaitingForDelivery () {
820 // Check whether the stacker is not empty
821 $isWaitingDelivery = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING)));
824 return $isWaitingDelivery;
828 * Checks whether encoded (raw) data is pending
830 * @return $isPending Whether encoded data is pending
832 public function isEncodedDataPending () {
833 // Check whether the stacker is not empty
834 $isPending = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING_STREAM)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING_STREAM)));
841 * Delivers an enqueued package to the stated destination. If a non-session
842 * id is provided, recipient resolver is being asked (and instanced once).
843 * This allows that a single package is being delivered to multiple targets
844 * without enqueueing it for every target. If no target is provided or it
845 * can't be determined a NoTargetException is being thrown.
848 * @throws NoTargetException If no target can't be determined
850 public function declareEnqueuedPackage () {
852 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
854 // Make sure this method isn't working if there is no package enqueued
855 if (!$this->isPackageEnqueued()) {
856 // This is not fatal but should be avoided
857 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw package data waiting declaration, but ' . __METHOD__ . ' has been called!');
862 * Now there are for sure packages to deliver, so start with the first
865 $packageData = $this->getStackInstance()->popNamed(self::STACKER_NAME_UNDECLARED);
867 // Declare the raw package data for delivery
868 $this->declareRawPackageData($packageData);
871 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
875 * Delivers the next declared package. Only one package per time will be sent
876 * because this may take time and slows down the whole delivery
881 public function processDeclaredPackage () {
883 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
885 // Sanity check if we have packages declared
886 if (!$this->isPackageDeclared()) {
887 // This is not fatal but should be avoided
888 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No package has been declared, but ' . __METHOD__ . ' has been called!');
893 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
896 assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
898 // Try to deliver the package
900 // And try to send it
901 $this->deliverRawPackageData($packageData);
903 // And remove it finally
904 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECLARED);
905 } catch (UnexpectedStateException $e) {
906 // The state is not excepected (shall be 'connected')
907 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Caught ' . $e->__toString() . ',message=' . $e->getMessage());
909 // Mark the package with status failed
910 $this->changePackageStatus($packageData, self::STACKER_NAME_DECLARED, self::PACKAGE_STATUS_FAILED);
914 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
918 * Sends waiting packages out for delivery
922 public function sendWaitingPackage () {
924 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
926 // Sanity check if we have packages waiting for delivery
927 if (!$this->isPackageWaitingForDelivery()) {
928 // This is not fatal but should be avoided
929 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No package is waiting for delivery, but ' . __METHOD__ . ' was called.');
934 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_OUTGOING);
937 // Now try to send it
938 $this->sendOutgoingRawPackageData($packageData);
940 // And remove it finally
941 $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING);
942 } catch (InvalidSocketException $e) {
943 // Output exception message
944 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package was not delivered: ' . $e->getMessage());
946 // Mark package as failed
947 $this->changePackageStatus($packageData, self::STACKER_NAME_OUTGOING, self::PACKAGE_STATUS_FAILED);
951 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
955 * Sends out encoded data to a socket
959 public function sendEncodedData () {
961 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
963 // Make sure there is pending encoded data
964 assert($this->isEncodedDataPending());
966 // Pop current data from stack
967 $encodedDataArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING_STREAM);
969 // Init in this round sent bytes
973 assert(is_resource($encodedDataArray[self::RAW_SOCKET_INDEX]));
976 //* 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=' . $encodedDataArray[self::RAW_DIFF_INDEX]);
977 if ($encodedDataArray[self::RAW_DIFF_INDEX] >= 0) {
978 // Send all out (encodedData is smaller than or equal buffer size)
979 //* 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]))));
980 $sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], ($encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - $encodedDataArray[self::RAW_DIFF_INDEX]));
982 // Send buffer size out
983 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: MD5=' . md5(substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], 0, $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX])));
984 $sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX]);
987 // If there was an error, we don't continue here
988 if ($sentBytes === FALSE) {
989 // Handle the error with a faked recipientData array
990 $this->handleSocketError(__METHOD__, __LINE__, $encodedDataArray[self::RAW_SOCKET_INDEX], array('0.0.0.0', '0'));
993 throw new InvalidSocketException(array($this, $encodedDataArray[self::RAW_SOCKET_INDEX], $socketError, $errorMessage), BaseListener::EXCEPTION_INVALID_SOCKET);
994 } elseif (($sentBytes === 0) && (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) > 0)) {
995 // Nothing sent means we are done
996 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
999 // The difference between sent bytes and length of raw data should not go below zero
1000 assert((strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) - $sentBytes) >= 0);
1002 // Add total sent bytes
1003 $encodedDataArray[self::RAW_SENT_BYTES_INDEX] += $sentBytes;
1005 // Cut out the last unsent bytes
1006 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: Sent out ' . $sentBytes . ' of ' . strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) . ' bytes ...');
1007 $encodedDataArray[self::RAW_ENCODED_DATA_INDEX] = substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $sentBytes);
1009 // Calculate difference again
1010 $encodedDataArray[self::RAW_DIFF_INDEX] = $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]);
1013 if (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) <= 0) {
1014 // Abort here, all sent!
1015 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
1020 // Push array back in stack
1021 $this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING_STREAM, $encodedDataArray);
1024 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
1027 ///////////////////////////////////////////////////////////////////////////
1028 // Receiving packages / raw data
1029 ///////////////////////////////////////////////////////////////////////////
1032 * Checks whether decoded raw data is pending
1034 * @return $isPending Whether decoded raw data is pending
1036 private function isRawDataPending () {
1037 // Just return whether the stack is not empty
1038 $isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_INCOMING));
1040 // Return the status
1045 * Checks whether new raw package data has arrived at a socket
1047 * @return $hasArrived Whether new raw package data has arrived for processing
1049 public function isNewRawDataPending () {
1050 // Visit the pool. This monitors the pool for incoming raw data.
1051 $this->getListenerPoolInstance()->accept($this->getVisitorInstance());
1053 // Check for new data arrival
1054 $hasArrived = $this->isRawDataPending();
1056 // Return the status
1061 * Handles the incoming decoded raw data. This method does not "convert" the
1062 * decoded data back into a package array, it just "handles" it and pushs it
1063 * on the next stack.
1067 public function handleIncomingDecodedData () {
1069 * This method should only be called if decoded raw data is pending,
1070 * so check it again.
1072 if (!$this->isRawDataPending()) {
1073 // This is not fatal but should be avoided
1074 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw (decoded?) data is pending, but ' . __METHOD__ . ' has been called!');
1078 // Very noisy debug message:
1079 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Stacker size is ' . $this->getStackInstance()->getStackCount(self::STACKER_NAME_DECODED_INCOMING) . ' entries.');
1081 // "Pop" the next entry (the same array again) from the stack
1082 $decodedData = $this->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_INCOMING);
1084 // Make sure both array elements are there
1086 (is_array($decodedData)) &&
1087 (isset($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
1088 (isset($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
1092 * Also make sure the error code is SOCKET_ERROR_UNHANDLED because we
1093 * only want to handle unhandled packages here.
1095 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: errorCode=' . $decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] . '(' . BaseRawDataHandler::SOCKET_ERROR_UNHANDLED . ')');
1096 assert($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] == BaseRawDataHandler::SOCKET_ERROR_UNHANDLED);
1098 // Remove the last chunk SEPARATOR (because there is no need for it)
1099 if (substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], -1, 1) == PackageFragmenter::CHUNK_SEPARATOR) {
1100 // It is there and should be removed
1101 $decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA] = substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], 0, -1);
1104 // This package is "handled" and can be pushed on the next stack
1105 //* 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 . ' ...');
1106 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_HANDLED, $decodedData);
1110 * Adds raw decoded data from the given handler instance to this receiver
1112 * @param $handlerInstance An instance of a Networkable class
1115 public function addRawDataToIncomingStack (Networkable $handlerInstance) {
1117 * Get the decoded data from the handler, this is an array with
1118 * 'raw_data' and 'error_code' as elements.
1120 $decodedData = $handlerInstance->getNextRawData();
1122 // Very noisy debug message:
1123 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: decodedData[' . gettype($decodedData) . ']=' . print_r($decodedData, TRUE));
1125 // And push it on our stack
1126 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_INCOMING, $decodedData);
1130 * Checks whether incoming decoded data is handled.
1132 * @return $isHandled Whether incoming decoded data is handled
1134 public function isIncomingRawDataHandled () {
1135 // Determine if the stack is not empty
1136 $isHandled = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_HANDLED));
1143 * Checks whether the assembler has pending data left
1145 * @return $isHandled Whether the assembler has pending data left
1147 public function ifAssemblerHasPendingDataLeft () {
1148 // Determine if the stack is not empty
1149 $isHandled = (!$this->getAssemblerInstance()->isPendingDataEmpty());
1156 * Checks whether the assembler has multiple packages pending
1158 * @return $isPending Whether the assembler has multiple packages pending
1160 public function ifMultipleMessagesPending () {
1161 // Determine if the stack is not empty
1162 $isPending = ($this->getAssemblerInstance()->ifMultipleMessagesPending());
1169 * Handles the attached assemler's pending data queue to be finally
1170 * assembled to the raw package data back.
1174 public function handleAssemblerPendingData () {
1176 $this->getAssemblerInstance()->handlePendingData();
1180 * Handles multiple messages.
1184 public function handleMultipleMessages () {
1186 $this->getAssemblerInstance()->handleMultipleMessages();
1190 * Assembles incoming decoded data so it will become an abstract network
1191 * package again. The assembler does later do it's job by an other task,
1192 * not this one to keep best speed possible.
1196 public function assembleDecodedDataToPackage () {
1197 // Make sure the raw decoded package data is handled
1198 assert($this->isIncomingRawDataHandled());
1200 // Get current package content (an array with two elements; see handleIncomingDecodedData() for details)
1201 $packageContent = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECODED_HANDLED);
1203 // Assert on some elements
1205 (is_array($packageContent)) &&
1206 (isset($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
1207 (isset($packageContent[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
1210 // Start assembling the raw package data array by chunking it
1211 $this->getAssemblerInstance()->chunkPackageContent($packageContent);
1213 // Remove the package from 'handled_decoded' stack ...
1214 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_HANDLED);
1216 // ... and push it on the 'chunked' stacker
1217 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Pushing ' . strlen($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA]) . ' bytes on stack ' . self::STACKER_NAME_DECODED_CHUNKED . ',packageContent=' . print_r($packageContent, TRUE));
1218 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_CHUNKED, $packageContent);
1222 * Accepts the visitor to process the visit "request"
1224 * @param $visitorInstance An instance of a Visitor class
1227 public function accept (Visitor $visitorInstance) {
1229 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - CALLED!');
1231 // Visit the package
1232 $visitorInstance->visitNetworkPackage($this);
1234 // Then visit the assembler to handle multiple packages
1235 $this->getAssemblerInstance()->accept($visitorInstance);
1238 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - EXIT!');
1246 public function clearAllStacks () {
1247 // Call the init method to force re-initialization
1248 $this->initStacks(TRUE);
1251 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: All stacker have been re-initialized.');
1255 * Removes the first failed outoging package from the stack to continue
1256 * with next one (it will never work until the issue is fixed by you).
1259 * @throws UnexpectedPackageStatusException If the package status is not 'failed'
1260 * @todo This may be enchanced for outgoing packages?
1262 public function removeFirstFailedPackage () {
1263 // Get the package again
1264 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
1266 // Is the package status 'failed'?
1267 if ($packageData[self::PACKAGE_DATA_STATUS] != self::PACKAGE_STATUS_FAILED) {
1269 throw new UnexpectedPackageStatusException(array($this, $packageData, self::PACKAGE_STATUS_FAILED), BaseListener::EXCEPTION_UNEXPECTED_PACKAGE_STATUS);
1272 // Remove this entry
1273 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECLARED);
1277 * "Decode" the package content into the same array when it was sent.
1279 * @param $rawPackageContent The raw package content to be "decoded"
1280 * @return $decodedData An array with 'sender', 'recipient', 'content' and 'status' elements
1282 public function decodeRawContent ($rawPackageContent) {
1283 // Use the separator '#' to "decode" it
1284 $decodedArray = explode(self::PACKAGE_DATA_SEPARATOR, $rawPackageContent);
1286 // Assert on count (should be always 3)
1287 assert(count($decodedArray) == self::DECODED_DATA_ARRAY_SIZE);
1290 * Create 'decodedData' array with all assoziative array elements.
1292 $decodedData = array(
1293 self::PACKAGE_DATA_SENDER => $decodedArray[self::INDEX_PACKAGE_SENDER],
1294 self::PACKAGE_DATA_RECIPIENT => $decodedArray[self::INDEX_PACKAGE_RECIPIENT],
1295 self::PACKAGE_DATA_CONTENT => $decodedArray[self::INDEX_PACKAGE_CONTENT],
1296 self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_DECODED,
1297 self::PACKAGE_DATA_HASH => $decodedArray[self::INDEX_PACKAGE_HASH],
1298 self::PACKAGE_DATA_PRIVATE_KEY_HASH => $decodedArray[self::INDEX_PACKAGE_PRIVATE_KEY_HASH]
1302 return $decodedData;
1306 * Handles decoded data for this node by "decoding" the 'content' part of
1307 * it. Again this method uses explode() for the "decoding" process.
1309 * @param $decodedData An array with decoded raw package data
1311 * @throws InvalidDataChecksumException If the checksum doesn't match
1313 public function handleRawData (array $decodedData) {
1315 * "Decode" the package's content by a simple explode() call, for
1316 * details of the array elements, see comments for constant
1319 $decodedContent = explode(self::PACKAGE_MASK_SEPARATOR, $decodedData[self::PACKAGE_DATA_CONTENT]);
1321 // Assert on array count for a very basic validation
1322 assert(count($decodedContent) == self::PACKAGE_CONTENT_ARRAY_SIZE);
1325 * Convert the indexed array into an associative array. This is much
1326 * better to remember than plain numbers, isn't it?
1328 $decodedContent = array(
1329 // Compressor's extension used to compress the data
1330 self::PACKAGE_CONTENT_EXTENSION => $decodedContent[self::INDEX_COMPRESSOR_EXTENSION],
1331 // Package data (aka "message") in BASE64-decoded form but still compressed
1332 self::PACKAGE_CONTENT_MESSAGE => base64_decode($decodedContent[self::INDEX_PACKAGE_DATA]),
1333 // Tags as an indexed array for "tagging" the message
1334 self::PACKAGE_CONTENT_TAGS => explode(self::PACKAGE_TAGS_SEPARATOR, $decodedContent[self::INDEX_TAGS]),
1335 // Checksum of the _decoded_ data
1336 self::PACKAGE_CONTENT_CHECKSUM => $decodedContent[self::INDEX_CHECKSUM],
1338 self::PACKAGE_CONTENT_SENDER => $decodedData[self::PACKAGE_DATA_SENDER],
1339 // Hash from decoded raw data
1340 self::PACKAGE_CONTENT_HASH => $decodedData[self::PACKAGE_DATA_HASH],
1341 // Hash of private key
1342 self::PACKAGE_CONTENT_PRIVATE_KEY_HASH => $decodedData[self::PACKAGE_DATA_PRIVATE_KEY_HASH]
1345 // Is the checksum valid?
1346 if (!$this->isChecksumValid($decodedContent, $decodedData)) {
1347 // Is not the same, so throw an exception here
1348 throw new InvalidDataChecksumException(array($this, $decodedContent, $decodedData), BaseListener::EXCEPTION_INVALID_DATA_CHECKSUM);
1352 * The checksum is the same, then it can be decompressed safely. The
1353 * original message is at this point fully decoded.
1355 $decodedContent[self::PACKAGE_CONTENT_MESSAGE] = $this->getCompressorInstance()->decompressStream($decodedContent[self::PACKAGE_CONTENT_MESSAGE]);
1357 // And push it on the next stack
1358 $this->getStackInstance()->pushNamed(self::STACKER_NAME_NEW_MESSAGE, $decodedContent);
1362 * Checks whether a new message has arrived
1364 * @return $hasArrived Whether a new message has arrived for processing
1366 public function isNewMessageArrived () {
1367 // Determine if the stack is not empty
1368 $hasArrived = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_NEW_MESSAGE));
1375 * Handles newly arrived messages
1378 * @todo Implement verification of all sent tags here?
1380 public function handleNewlyArrivedMessage () {
1381 // Make sure there is at least one message
1382 assert($this->isNewMessageArrived());
1384 // Get it from the stacker, it is the full array with the decoded message
1385 $decodedContent = $this->getStackInstance()->popNamed(self::STACKER_NAME_NEW_MESSAGE);
1387 // Generate the hash of comparing it
1388 if (!$this->isPackageHashValid($decodedContent)) {
1389 // Is not valid, so throw an exception here
1390 exit(__METHOD__ . ':INVALID HASH! UNDER CONSTRUCTION!' . chr(10));
1393 // Now get a filter chain back from factory with given tags array
1394 $chainInstance = PackageFilterChainFactory::createChainByTagsArray($decodedContent[self::PACKAGE_CONTENT_TAGS]);
1397 * Process the message through all filters, note that all other
1398 * elements from $decodedContent are no longer needed.
1400 $chainInstance->processMessage($decodedContent, $this);
1403 * Post-processing of message data (this won't remove the message from
1406 $chainInstance->postProcessMessage($this);
1410 * Checks whether a processed message is pending for "interpretation"
1412 * @return $isPending Whether a processed message is pending
1414 public function isProcessedMessagePending () {
1416 $isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_PROCESSED_MESSAGE));
1423 * Handle processed messages by "interpreting" the 'message_type' element
1427 public function handleProcessedMessage () {
1428 // Get it from the stacker, it is the full array with the processed message
1429 $messageArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_PROCESSED_MESSAGE);
1431 // Add type for later easier handling
1432 $messageArray[self::MESSAGE_ARRAY_DATA][self::MESSAGE_ARRAY_TYPE] = $messageArray[self::MESSAGE_ARRAY_TYPE];
1435 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: messageArray=' . print_r($messageArray, TRUE));
1437 // Create a handler instance from given message type
1438 $handlerInstance = MessageTypeHandlerFactory::createMessageTypeHandlerInstance($messageArray[self::MESSAGE_ARRAY_TYPE]);
1440 // Handle message data
1441 $handlerInstance->handleMessageData($messageArray[self::MESSAGE_ARRAY_DATA], $this);
1443 // Post-handling of message data
1444 $handlerInstance->postHandleMessageData($messageArray, $this);
1448 * Feeds the hash and sender (as recipient for the 'sender' reward) to the
1449 * miner's queue, unless the message is not a "reward claim" message as this
1450 * leads to an endless loop. You may wish to run the miner to get some
1451 * reward ("Hubcoins") for "mining" this hash.
1453 * @param $messageData Array with message data
1457 public function feedHashToMiner (array $messageData) {
1458 // Is the feature enabled?
1459 if (!FrameworkFeature::isFeatureAvailable('hubcoin_reward')) {
1461 * Feature is not enabled, don't feed the hash to the miner as it
1467 // Make sure the required elements are there
1468 assert(isset($messageData[self::MESSAGE_ARRAY_SENDER]));
1469 assert(isset($messageData[self::MESSAGE_ARRAY_HASH]));
1470 assert(isset($messageData[self::MESSAGE_ARRAY_TAGS]));
1473 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: messageData=' . print_r($messageData, TRUE));
1475 // Resolve session id ('sender' is a session id) into node id
1476 $nodeId = HubTools::resolveNodeIdBySessionId($messageData[self::MESSAGE_ARRAY_SENDER]);
1478 // Is 'claim_reward' the message type?
1479 if (in_array('claim_reward', $messageData[self::MESSAGE_ARRAY_TAGS])) {
1481 * Then don't feed this message to the miner as this causes an
1482 * endless loop of mining.
1487 $this->partialStub('@TODO nodeId=' . $nodeId . ',messageData=' . print_r($messageData, TRUE));