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Bibliographic Details
Main Author:	Omaira Parada
Format:	Artículo científico
Language:	es
Published:	Instituto Tecnológico de Aguascalientes 2008
Subjects:	Ingeniería IPv6 IPv4 Click ICMPv6
Online Access:	https://www.redalyc.org/articulo.oa?id=94403501
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Optimización de la plataforma de desarrollo click para la auto-configuración sin estado en IPv6 Omaira Parada Marco A. Hernández Juan A. Nungaray Iván Castillo José A. Calderón Ingeniería IPv6 IPv4 Click ICMPv6 Actualmente estamos experimentando una evolución continua de la Internet. Propuestas sobre nuevos protocolos y nuevas arquitecturas están siendo analizadas para solucionar algunos de los problemas presentes: adecuada calidad de servicio, movilidad, seguridad, entre otros. Por otro lado, para un mejor entendimiento de estas propuestas es necesario disponer de nuevas herramientas de prototipado rápido. Existen diversos sistemas para la implementación de redes con los protocolos y arquitecturas actuales. Uno de ellos es la plataforma Click, que permite diseñar, configurar y emular componentes internos de routers y así poder soportar los problemas actuales en la red. La plataforma Click tiene un gran soporte para desarrollar procesadores de paquetes bajo IPv4 pero desafortunadamente no es así para IPv6. Este trabajo presenta el diseño, implementación y evaluación de un elemento para la generación de un mensaje de anunciación de router para llevar a cabo el proceso de auto-configuración sin estado en IPv6 desarrollado sobre la arquitectura de software Click y poder así, contribuir al desarrollo de elementos para el soporte de IPv6. 2008 artículo científico 1405-5597 https://www.redalyc.org/articulo.oa?id=94403501 es http://www.redalyc.org/revista.oa?id=944 Conciencia Tecnológica application/pdf Instituto Tecnológico de Aguascalientes Conciencia Tecnológica (México) Num.35

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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