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Bibliographic Details
Main Author:	Christian Lazo R.
Format:	Artículo científico
Language:	en
Published:	Universidad de Tarapacá 2005
Subjects:	Ingeniería IPv6 UACh M6Bone RENATER Multicast
Online Access:	https://www.redalyc.org/articulo.oa?id=11414672008
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OPERATION OF A NODE IN THE EXPERIMENTAL IPV6 MULTICAST NETWORK "M6BONE" Christian Lazo R. Roland Glöckler Ingeniería IPv6 UACh M6Bone RENATER Multicast This work describes the participation of the Universidad Austral de Chile (UACh) in the experimental network M6Bone or IPv6 multicast network. Currently the M6Bone network works in distributed manner, giving support to connections at global scale. Its administration is coordinated from the French research and development network RENATER. Many research projects make use of this worldwide network structure, using it as a great test laboratory with the intention to enable and accelerate the migration of IPv4 to IPv6. In the implementation of the model, free software was used to configure an IPv6 router with multicast support and videoconference tools were used to verify the correct operation. It could be verified that the connection mechanism enables video and audio conferencing of good quality on global scale. Therefore, the use of IPv6 for applications of this type can be promoted. 2005 artículo científico 0717-1072 https://www.redalyc.org/articulo.oa?id=11414672008 en http://www.redalyc.org/revista.oa?id=114 Revista Facultad de Ingeniería application/pdf Universidad de Tarapacá Revista Facultad de Ingeniería (Chile) Num.3 Vol.13

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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