3 * A general hub system class
5 * @author Roland Haeder <webmaster@shipsimu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Hub Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.shipsimu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class BaseHubSystem extends BaseFrameworkSystem {
26 const EXCEPTION_UNSUPPORTED_ERROR_HANDLER = 0x900;
27 const EXCEPTION_CHUNK_ALREADY_ASSEMBLED = 0x901;
28 const EXCEPTION_ANNOUNCEMENT_NOT_ACCEPTED = 0x902;
29 const EXCEPTION_INVALID_CONNECTION_TYPE = 0x903;
30 const EXCEPTION_ANNOUNCEMENT_NOT_ATTEMPTED = 0x904;
31 const EXCEPTION_BASE64_ENCODING_NOT_MODULO_4 = 0x905;
32 const EXCEPTION_NODE_SESSION_ID_NOT_VERIFYING = 0x906;
33 const EXCEPTION_REQUEST_NOT_ACCEPTED = 0x907;
34 const EXCEPTION_DHT_BOOTSTRAP_NOT_ACCEPTED = 0x908;
35 const EXCEPTION_MULTIPLE_MESSAGE_SENT = 0x909;
36 const EXCEPTION_DHT_BOOTSTRAP_NOT_ATTEMPTED = 0x90a;
37 const EXCEPTION_INVALID_UNL = 0x90b;
39 // Message status codes
40 const MESSAGE_STATUS_CODE_OKAY = 'OKAY';
43 * Separator for all bootstrap node entries
45 const BOOTSTRAP_NODES_SEPARATOR = ';';
48 * An instance of a node
50 private $nodeInstance = NULL;
53 * An instance of a communicator
55 private $communicatorInstance = NULL;
58 * An instance of a cruncher
60 private $cruncherInstance = NULL;
63 * An instance of a miner
65 private $minerInstance = NULL;
68 * A network package handler instance
70 private $packageInstance = NULL;
73 * A Receivable instance
75 private $receiverInstance = NULL;
80 private $stateInstance = NULL;
83 * Listener pool instance
85 private $listenerPoolInstance = NULL;
90 private $fragmenterInstance = NULL;
95 private $assemblerInstance = NULL;
100 private $infoInstance = NULL;
103 * Name of used protocol
105 private $protocolName = 'invalid';
108 * Protected constructor
110 * @param $className Name of the class
113 protected function __construct ($className) {
114 // Call parent constructor
115 parent::__construct($className);
119 * Getter for node instance
121 * @return $nodeInstance An instance of a node node
123 public final function getNodeInstance () {
124 return $this->nodeInstance;
128 * Setter for node instance
130 * @param $nodeInstance An instance of a node node
133 protected final function setNodeInstance (NodeHelper $nodeInstance) {
134 $this->nodeInstance = $nodeInstance;
138 * Getter for communicator instance
140 * @return $communicatorInstance An instance of a Communicator class
142 public final function getCommunicatorInstance () {
143 return $this->communicatorInstance;
147 * Setter for communicator instance
149 * @param $communicatorInstance An instance of a Communicator class
152 protected final function setCommunicatorInstance (Communicator $communicatorInstance) {
153 $this->communicatorInstance = $communicatorInstance;
157 * Getter for cruncher instance
159 * @return $cruncherInstance An instance of a cruncher cruncher
161 public final function getCruncherInstance () {
162 return $this->cruncherInstance;
166 * Setter for cruncher instance
168 * @param $cruncherInstance An instance of a cruncher cruncher
171 protected final function setCruncherInstance (CruncherHelper $cruncherInstance) {
172 $this->cruncherInstance = $cruncherInstance;
176 * Getter for miner instance
178 * @return $minerInstance An instance of a miner miner
180 public final function getMinerInstance () {
181 return $this->minerInstance;
185 * Setter for miner instance
187 * @param $minerInstance An instance of a miner miner
190 protected final function setMinerInstance (MinerHelper $minerInstance) {
191 $this->minerInstance = $minerInstance;
195 * Setter for network package handler instance
197 * @param $packageInstance The network package instance we shall set
200 protected final function setPackageInstance (Deliverable $packageInstance) {
201 $this->packageInstance = $packageInstance;
205 * Getter for network package handler instance
207 * @return $packageInstance The network package handler instance we shall set
209 protected final function getPackageInstance () {
210 return $this->packageInstance;
214 * Setter for receiver instance
216 * @param $receiverInstance A Receivable instance we shall set
219 protected final function setReceiverInstance (Receivable $receiverInstance) {
220 $this->receiverInstance = $receiverInstance;
224 * Getter for receiver instance
226 * @return $receiverInstance A Receivable instance we shall get
228 protected final function getReceiverInstance () {
229 return $this->receiverInstance;
233 * Setter for state instance
235 * @param $stateInstance A Stateable instance
238 public final function setStateInstance (Stateable $stateInstance) {
239 $this->stateInstance = $stateInstance;
243 * Getter for state instance
245 * @return $stateInstance A Stateable instance
247 public final function getStateInstance () {
248 return $this->stateInstance;
252 * Setter for listener pool instance
254 * @param $listenerPoolInstance The new listener pool instance
257 protected final function setListenerPoolInstance (PoolableListener $listenerPoolInstance) {
258 $this->listenerPoolInstance = $listenerPoolInstance;
262 * Getter for listener pool instance
264 * @return $listenerPoolInstance Our current listener pool instance
266 public final function getListenerPoolInstance () {
267 return $this->listenerPoolInstance;
271 * Setter for fragmenter instance
273 * @param $fragmenterInstance A Fragmentable instance
276 protected final function setFragmenterInstance (Fragmentable $fragmenterInstance) {
277 $this->fragmenterInstance = $fragmenterInstance;
281 * Getter for fragmenter instance
283 * @return $fragmenterInstance A Fragmentable instance
285 protected final function getFragmenterInstance () {
286 return $this->fragmenterInstance;
290 * Setter for assembler instance
292 * @param $assemblerInstance An instance of an Assembler class
295 protected final function setAssemblerInstance (Assembler $assemblerInstance) {
296 $this->assemblerInstance = $assemblerInstance;
300 * Getter for assembler instance
302 * @return $assemblerInstance An instance of an Assembler class
304 protected final function getAssemblerInstance () {
305 return $this->assemblerInstance;
309 * Setter for info instance
311 * @param $infoInstance A ShareableInfo instance
314 protected final function setInfoInstance (ShareableInfo $infoInstance) {
315 $this->infoInstance = $infoInstance;
319 * Getter for info instance
321 * @return $infoInstance An instance of a ShareableInfo class
323 public final function getInfoInstance () {
324 return $this->infoInstance;
330 * @param $nodeId The new node id
333 protected final function setNodeId ($nodeId) {
335 $this->getConfigInstance()->setConfigEntry('node_id', (string) $nodeId);
341 * @return $nodeId Current node id
343 public final function getNodeId () {
344 // Get it from config
345 return $this->getConfigInstance()->getConfigEntry('node_id');
349 * Setter for private key
351 * @param $privateKey The new private key
354 protected final function setPrivateKey ($privateKey) {
356 $this->getConfigInstance()->setConfigEntry('private_key', (string) $privateKey);
360 * Getter for private key
362 * @return $privateKey Current private key
364 public final function getPrivateKey () {
365 // Get it from config
366 return $this->getConfigInstance()->getConfigEntry('private_key');
370 * Setter for private key hash
372 * @param $privateKeyHash The new private key hash
375 protected final function setPrivateKeyHash ($privateKeyHash) {
377 $this->getConfigInstance()->setConfigEntry('private_key_hash', (string) $privateKeyHash);
381 * Getter for private key hash
383 * @return $privateKeyHash Current private key hash
385 public final function getPrivateKeyHash () {
386 // Get it from config
387 return $this->getConfigInstance()->getConfigEntry('private_key_hash');
391 * Setter for session id
393 * @param $sessionId The new session id
396 protected final function setSessionId ($sessionId) {
397 $this->getConfigInstance()->setConfigEntry('session_id', (string) $sessionId);
401 * Getter for session id
403 * @return $sessionId Current session id
405 public final function getSessionId () {
406 return $this->getConfigInstance()->getConfigEntry('session_id');
410 * Getter for protocol name
412 * @return $protocolName Name of used protocol
414 public final function getProtocolName () {
415 return $this->protocolName;
419 * Setter for protocol name
421 * @param $protocolName Name of used protocol
424 protected final function setProtocolName ($protocolName) {
425 $this->protocolName = $protocolName;
429 * Constructs a callable method name from given socket error code. If the
430 * method is not found, a generic one is used.
432 * @param $errorCode Error code from socket_last_error()
433 * @return $handlerName Call-back method name for the error handler
434 * @throws UnsupportedSocketErrorHandlerException If the error handler is not implemented
436 protected function getSocketErrorHandlerFromCode ($errorCode) {
437 // Create a name from translated error code
438 $handlerName = 'socketError' . $this->convertToClassName($this->translateSocketErrorCodeToName($errorCode)) . 'Handler';
440 // Is the call-back method there?
441 if (!method_exists($this, $handlerName)) {
442 // Please implement this
443 throw new UnsupportedSocketErrorHandlerException(array($this, $handlerName, $errorCode), self::EXCEPTION_UNSUPPORTED_ERROR_HANDLER);
451 * Handles socket error for given socket resource and peer data. This method
452 * validates $socketResource if it is a valid resource (see is_resource())
453 * but assumes valid data in array $recipientData, except that
454 * count($recipientData) is always 2.
456 * @param $method Value of __METHOD__ from calling method
457 * @param $line Value of __LINE__ from calling method
458 * @param $socketResource A valid socket resource
459 * @param $unlData A valid UNL data array
461 * @throws InvalidSocketException If $socketResource is no socket resource
462 * @throws NoSocketErrorDetectedException If socket_last_error() gives zero back
464 protected final function handleSocketError ($method, $line, $socketResource, array $unlData) {
465 // This method handles only socket resources
466 if (!is_resource($socketResource)) {
467 // No resource, abort here
468 throw new InvalidSocketException(array($this, $socketResource), BaseListener::EXCEPTION_INVALID_SOCKET);
472 //* DEBUG-DIE: */ die(__METHOD__ . ':unlData=' . print_r($unlData, TRUE));
473 assert(isset($unlData[UniversalNodeLocator::UNL_PART_PROTOCOL]));
474 assert(isset($unlData[UniversalNodeLocator::UNL_PART_ADDRESS]));
475 assert(isset($unlData[UniversalNodeLocator::UNL_PART_PORT]));
477 // Get error code for first validation (0 is not an error)
478 $errorCode = socket_last_error($socketResource);
480 // If the error code is zero, someone called this method without an error
481 if ($errorCode == 0) {
482 // No error detected (or previously cleared outside this method)
483 throw new NoSocketErrorDetectedException(array($this, $socketResource), BaseListener::EXCEPTION_NO_SOCKET_ERROR);
486 // Get handler (method) name
487 $handlerName = $this->getSocketErrorHandlerFromCode($errorCode);
489 // Call-back the error handler method
490 call_user_func_array(array($this, $handlerName), array($socketResource, $unlData));
492 // Finally clear the error because it has been handled
493 socket_clear_error($socketResource);
497 * Translates socket error codes into our own internal names which can be
498 * used for call-backs.
500 * @param $errorCode The error code from socket_last_error() to be translated
501 * @return $errorName The translated name (all lower-case, with underlines)
503 public function translateSocketErrorCodeToName ($errorCode) {
504 // Nothing bad happened by default
505 $errorName = BaseRawDataHandler::SOCKET_CONNECTED;
507 // Is the code a number, then we have to change it
508 switch ($errorCode) {
509 case 0: // Silently ignored, the socket is connected
512 case 11: // "Resource temporary unavailable"
513 $errorName = BaseRawDataHandler::SOCKET_ERROR_RESOURCE_UNAVAILABLE;
516 case 32: // "Broken pipe"
517 $errorName = BaseRawDataHandler::SOCKET_ERROR_BROKEN_PIPE;
520 case 104: // "Connection reset by peer"
521 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_RESET_BY_PEER;
524 case 107: // "Transport end-point not connected"
525 case 134: // On some (?) systems for 'transport end-point not connected'
526 // @TODO On some systems it is 134, on some 107?
527 $errorName = BaseRawDataHandler::SOCKET_ERROR_TRANSPORT_ENDPOINT;
530 case 110: // "Connection timed out"
531 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_TIMED_OUT;
534 case 111: // "Connection refused"
535 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_REFUSED;
538 case 113: // "No route to host"
539 $errorName = BaseRawDataHandler::SOCKET_ERROR_NO_ROUTE_TO_HOST;
542 case 114: // "Operation already in progress"
543 $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_ALREADY_PROGRESS;
546 case 115: // "Operation now in progress"
547 $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_IN_PROGRESS;
550 default: // Everything else <> 0
551 // Unhandled error code detected, so first debug it because we may want to handle it like the others
552 self::createDebugInstance(__CLASS__)->debugOutput('BASE-HUB[' . __METHOD__ . ':' . __LINE__ . '] UNKNOWN ERROR CODE = ' . $errorCode . ', MESSAGE = ' . socket_strerror($errorCode));
554 // Change it only in this class
555 $errorName = BaseRawDataHandler::SOCKET_ERROR_UNKNOWN;
559 // Return translated name
564 * Shuts down a given socket resource. This method does only ease calling
567 * @param $socketResource A valid socket resource
570 public function shutdownSocket ($socketResource) {
572 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM: Shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...');
574 // Set socket resource
575 $this->setSocketResource($socketResource);
577 // Get a visitor instance
578 $visitorInstance = ObjectFactory::createObjectByConfiguredName('shutdown_socket_visitor_class');
581 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString());
584 $this->accept($visitorInstance);
588 * Half-shuts down a given socket resource. This method does only ease calling
589 * an other visitor than shutdownSocket() does.
591 * @param $socketResource A valid socket resource
594 public function halfShutdownSocket ($socketResource) {
596 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM: Half-shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...');
598 // Set socket resource
599 $this->setSocketResource($socketResource);
601 // Get a visitor instance
602 $visitorInstance = ObjectFactory::createObjectByConfiguredName('half_shutdown_socket_visitor_class');
605 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString());
608 $this->accept($visitorInstance);
612 * "Getter" for a printable state name
614 * @return $stateName Name of the node's state in a printable format
616 public final function getPrintableState () {
620 // Get the state instance
621 $stateInstance = $this->getStateInstance();
623 // Is it an instance of Stateable?
624 if ($stateInstance instanceof Stateable) {
625 // Then use that state name
626 $stateName = $stateInstance->getStateName();