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 * A network package handler instance
55 private $packageInstance = NULL;
58 * A Receivable instance
60 private $receiverInstance = NULL;
63 * Listener pool instance
65 private $listenerPoolInstance = NULL;
70 private $fragmenterInstance = NULL;
75 private $assemblerInstance = NULL;
80 private $infoInstance = NULL;
83 * Protected constructor
85 * @param $className Name of the class
88 protected function __construct ($className) {
89 // Call parent constructor
90 parent::__construct($className);
94 * Getter for node instance
96 * @return $nodeInstance An instance of a node node
98 public final function getNodeInstance () {
99 return $this->nodeInstance;
103 * Setter for node instance
105 * @param $nodeInstance An instance of a node node
108 protected final function setNodeInstance (NodeHelper $nodeInstance) {
109 $this->nodeInstance = $nodeInstance;
113 * Setter for network package handler instance
115 * @param $packageInstance The network package instance we shall set
118 protected final function setPackageInstance (Deliverable $packageInstance) {
119 $this->packageInstance = $packageInstance;
123 * Getter for network package handler instance
125 * @return $packageInstance The network package handler instance we shall set
127 protected final function getPackageInstance () {
128 return $this->packageInstance;
132 * Setter for receiver instance
134 * @param $receiverInstance A Receivable instance we shall set
137 protected final function setReceiverInstance (Receivable $receiverInstance) {
138 $this->receiverInstance = $receiverInstance;
142 * Getter for receiver instance
144 * @return $receiverInstance A Receivable instance we shall get
146 protected final function getReceiverInstance () {
147 return $this->receiverInstance;
151 * Setter for listener pool instance
153 * @param $listenerPoolInstance The new listener pool instance
156 protected final function setListenerPoolInstance (PoolableListener $listenerPoolInstance) {
157 $this->listenerPoolInstance = $listenerPoolInstance;
161 * Getter for listener pool instance
163 * @return $listenerPoolInstance Our current listener pool instance
165 public final function getListenerPoolInstance () {
166 return $this->listenerPoolInstance;
170 * Setter for fragmenter instance
172 * @param $fragmenterInstance A Fragmentable instance
175 protected final function setFragmenterInstance (Fragmentable $fragmenterInstance) {
176 $this->fragmenterInstance = $fragmenterInstance;
180 * Getter for fragmenter instance
182 * @return $fragmenterInstance A Fragmentable instance
184 protected final function getFragmenterInstance () {
185 return $this->fragmenterInstance;
189 * Setter for assembler instance
191 * @param $assemblerInstance An instance of an Assembler class
194 protected final function setAssemblerInstance (Assembler $assemblerInstance) {
195 $this->assemblerInstance = $assemblerInstance;
199 * Getter for assembler instance
201 * @return $assemblerInstance An instance of an Assembler class
203 protected final function getAssemblerInstance () {
204 return $this->assemblerInstance;
208 * Setter for info instance
210 * @param $infoInstance A ShareableInfo instance
213 protected final function setInfoInstance (ShareableInfo $infoInstance) {
214 $this->infoInstance = $infoInstance;
218 * Getter for info instance
220 * @return $infoInstance An instance of a ShareableInfo class
222 public final function getInfoInstance () {
223 return $this->infoInstance;
229 * @param $nodeId The new node id
232 protected final function setNodeId ($nodeId) {
234 $this->getConfigInstance()->setConfigEntry('node_id', (string) $nodeId);
240 * @return $nodeId Current node id
242 public final function getNodeId () {
243 // Get it from config
244 return $this->getConfigInstance()->getConfigEntry('node_id');
248 * Setter for private key
250 * @param $privateKey The new private key
253 protected final function setPrivateKey ($privateKey) {
255 $this->getConfigInstance()->setConfigEntry('private_key', (string) $privateKey);
259 * Getter for private key
261 * @return $privateKey Current private key
263 public final function getPrivateKey () {
264 // Get it from config
265 return $this->getConfigInstance()->getConfigEntry('private_key');
269 * Setter for private key hash
271 * @param $privateKeyHash The new private key hash
274 protected final function setPrivateKeyHash ($privateKeyHash) {
276 $this->getConfigInstance()->setConfigEntry('private_key_hash', (string) $privateKeyHash);
280 * Getter for private key hash
282 * @return $privateKeyHash Current private key hash
284 public final function getPrivateKeyHash () {
285 // Get it from config
286 return $this->getConfigInstance()->getConfigEntry('private_key_hash');
290 * Setter for session id
292 * @param $sessionId The new session id
295 protected final function setSessionId ($sessionId) {
296 $this->getConfigInstance()->setConfigEntry('session_id', (string) $sessionId);
300 * Getter for session id
302 * @return $sessionId Current session id
304 public final function getSessionId () {
305 return $this->getConfigInstance()->getConfigEntry('session_id');
309 * Constructs a callable method name from given socket error code. If the
310 * method is not found, a generic one is used.
312 * @param $errorCode Error code from socket_last_error()
313 * @return $handlerName Call-back method name for the error handler
314 * @throws UnsupportedSocketErrorHandlerException If the error handler is not implemented
316 protected function getSocketErrorHandlerFromCode ($errorCode) {
317 // Create a name from translated error code
318 $handlerName = 'socketError' . self::convertToClassName($this->translateSocketErrorCodeToName($errorCode)) . 'Handler';
320 // Is the call-back method there?
321 if (!method_exists($this, $handlerName)) {
322 // Please implement this
323 throw new UnsupportedSocketErrorHandlerException(array($this, $handlerName, $errorCode), self::EXCEPTION_UNSUPPORTED_ERROR_HANDLER);
331 * Handles socket error for given socket resource and peer data. This method
332 * validates $socketResource if it is a valid resource (see is_resource())
333 * but assumes valid data in array $recipientData, except that
334 * count($recipientData) is always 2.
336 * @param $method Value of __METHOD__ from calling method
337 * @param $line Value of __LINE__ from calling method
338 * @param $socketResource A valid socket resource
339 * @param $unlData A valid UNL data array
341 * @throws InvalidSocketException If $socketResource is no socket resource
342 * @throws NoSocketErrorDetectedException If socket_last_error() gives zero back
344 protected final function handleSocketError ($method, $line, $socketResource, array $unlData) {
345 // This method handles only socket resources
346 if (!is_resource($socketResource)) {
347 // No resource, abort here
348 throw new InvalidSocketException(array($this, $socketResource), BaseListener::EXCEPTION_INVALID_SOCKET);
352 //* DEBUG-DIE: */ die(__METHOD__ . ':unlData=' . print_r($unlData, TRUE));
353 assert(isset($unlData[UniversalNodeLocator::UNL_PART_PROTOCOL]));
354 assert(isset($unlData[UniversalNodeLocator::UNL_PART_ADDRESS]));
355 assert(isset($unlData[UniversalNodeLocator::UNL_PART_PORT]));
357 // Get error code for first validation (0 is not an error)
358 $errorCode = socket_last_error($socketResource);
360 // If the error code is zero, someone called this method without an error
361 if ($errorCode == 0) {
362 // No error detected (or previously cleared outside this method)
363 throw new NoSocketErrorDetectedException(array($this, $socketResource), BaseListener::EXCEPTION_NO_SOCKET_ERROR);
366 // Get handler (method) name
367 $handlerName = $this->getSocketErrorHandlerFromCode($errorCode);
369 // Call-back the error handler method
370 call_user_func_array(array($this, $handlerName), array($socketResource, $unlData));
372 // Finally clear the error because it has been handled
373 socket_clear_error($socketResource);
377 * Translates socket error codes into our own internal names which can be
378 * used for call-backs.
380 * @param $errorCode The error code from socket_last_error() to be translated
381 * @return $errorName The translated name (all lower-case, with underlines)
383 public function translateSocketErrorCodeToName ($errorCode) {
384 // Nothing bad happened by default
385 $errorName = BaseRawDataHandler::SOCKET_CONNECTED;
387 // Is the code a number, then we have to change it
388 switch ($errorCode) {
389 case 0: // Silently ignored, the socket is connected
392 case 11: // "Resource temporary unavailable"
393 $errorName = BaseRawDataHandler::SOCKET_ERROR_RESOURCE_UNAVAILABLE;
396 case 32: // "Broken pipe"
397 $errorName = BaseRawDataHandler::SOCKET_ERROR_BROKEN_PIPE;
400 case 104: // "Connection reset by peer"
401 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_RESET_BY_PEER;
404 case 107: // "Transport end-point not connected"
405 case 134: // On some (?) systems for 'transport end-point not connected'
406 // @TODO On some systems it is 134, on some 107?
407 $errorName = BaseRawDataHandler::SOCKET_ERROR_TRANSPORT_ENDPOINT;
410 case 110: // "Connection timed out"
411 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_TIMED_OUT;
414 case 111: // "Connection refused"
415 $errorName = BaseRawDataHandler::SOCKET_ERROR_CONNECTION_REFUSED;
418 case 113: // "No route to host"
419 $errorName = BaseRawDataHandler::SOCKET_ERROR_NO_ROUTE_TO_HOST;
422 case 114: // "Operation already in progress"
423 $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_ALREADY_PROGRESS;
426 case 115: // "Operation now in progress"
427 $errorName = BaseRawDataHandler::SOCKET_ERROR_OPERATION_IN_PROGRESS;
430 default: // Everything else <> 0
431 // Unhandled error code detected, so first debug it because we may want to handle it like the others
432 self::createDebugInstance(__CLASS__)->debugOutput('BASE-HUB[' . __METHOD__ . ':' . __LINE__ . '] UNKNOWN ERROR CODE = ' . $errorCode . ', MESSAGE = ' . socket_strerror($errorCode));
434 // Change it only in this class
435 $errorName = BaseRawDataHandler::SOCKET_ERROR_UNKNOWN;
439 // Return translated name
444 * Shuts down a given socket resource. This method does only ease calling
447 * @param $socketResource A valid socket resource
450 public function shutdownSocket ($socketResource) {
452 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM: Shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...');
454 // Set socket resource
455 $this->setSocketResource($socketResource);
457 // Get a visitor instance
458 $visitorInstance = ObjectFactory::createObjectByConfiguredName('shutdown_socket_visitor_class');
461 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString());
464 $this->accept($visitorInstance);
468 * Half-shuts down a given socket resource. This method does only ease calling
469 * an other visitor than shutdownSocket() does.
471 * @param $socketResource A valid socket resource
474 public function halfShutdownSocket ($socketResource) {
476 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM: Half-shutting down socket resource ' . $socketResource . ' with state ' . $this->getPrintableState() . ' ...');
478 // Set socket resource
479 $this->setSocketResource($socketResource);
481 // Get a visitor instance
482 $visitorInstance = ObjectFactory::createObjectByConfiguredName('half_shutdown_socket_visitor_class');
485 self::createDebugInstance(__CLASS__)->debugOutput('HUB-SYSTEM:' . $this->__toString() . ': visitorInstance=' . $visitorInstance->__toString());
488 $this->accept($visitorInstance);
492 * "Getter" for a printable state name
494 * @return $stateName Name of the node's state in a printable format
496 public final function getPrintableState () {
500 // Get the state instance
501 $stateInstance = $this->getStateInstance();
503 // Is it an instance of Stateable?
504 if ($stateInstance instanceof Stateable) {
505 // Then use that state name
506 $stateName = $stateInstance->getStateName();