Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * ClamAV antivirus adminlib.

 *

 * @package    antivirus_clamav

 * @copyright  2015 Ruslan Kabalin, Lancaster University.

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

/**

 * Admin setting for running, adds verification.

 *

 * @package    antivirus_clamav

 * @copyright  2015 Ruslan Kabalin, Lancaster University.

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class antivirus_clamav_runningmethod_setting extends admin_setting_configselect {

    /**

     * Save a setting

     *

     * @param string $data

     * @return string empty or error string

     */

    public function write_setting($data) {

        $validated = $this->validate($data);

        if ($validated !== true) {

            return $validated;

        }

        return parent::write_setting($data);

    }

    /**

     * Validate data.

     *

     * This ensures that the selected socket transport is supported by this system.

     *

     * @param string $data

     * @return mixed True on success, else error message.

     */

    public function validate($data) {

        $supportedtransports = stream_get_transports();

        if ($data === 'unixsocket') {

            if (array_search('unix', $supportedtransports) === false) {

                return get_string('errornounixsocketssupported', 'antivirus_clamav');

            }

        } else if ($data === 'tcpsocket') {

            if (array_search('tcp', $supportedtransports) === false) {

                return get_string('errornotcpsocketssupported', 'antivirus_clamav');

            }

        }

        return true;

    }

}

/**

 * Abstract socket checking class

 *

 * @package    antivirus_clamav

 * @copyright  2015 Ruslan Kabalin, Lancaster University.

 * @copyright  2019 Didier Raboud, Liip AG.

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class antivirus_clamav_socket_setting extends admin_setting_configtext {

    /**

     * Ping ClamAV socket.

     *

     * This ensures that a socket setting is correct and that ClamAV is running.

     *

     * @param string $socketaddress Address to the socket to connect to (for stream_socket_client)

     * @return mixed True on success, else error message.

     */

    protected function validate_clamav_socket($socketaddress) {

        $socket = stream_socket_client($socketaddress, $errno, $errstr, ANTIVIRUS_CLAMAV_SOCKET_TIMEOUT);

        if (!$socket) {

            return get_string('errorcantopensocket', 'antivirus_clamav', "$errstr ($errno)");

        } else {

            // Send PING query to ClamAV socket to check its running state.

            fwrite($socket, "nPING\n");

            $response = stream_get_line($socket, 4);

            fclose($socket);

            if ($response !== 'PONG') {

                return get_string('errorclamavnoresponse', 'antivirus_clamav');

            }

        }

        return true;

    }

}

/**

 * Admin setting for unix socket path, adds verification.

 *

 * @package    antivirus_clamav

 * @copyright  2015 Ruslan Kabalin, Lancaster University.

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class antivirus_clamav_pathtounixsocket_setting extends antivirus_clamav_socket_setting {

    /**

     * Validate data.

     *

     * This ensures that unix socket setting is correct and ClamAV is running.

     *

     * @param string $data

     * @return mixed True on success, else error message.

     */

    public function validate($data) {

        $result = parent::validate($data);

        if ($result !== true) {

            return $result;

        }

        $runningmethod = get_config('antivirus_clamav', 'runningmethod');

        if ($runningmethod === 'unixsocket') {

            return $this->validate_clamav_socket('unix://' . $data);

        }

        return true;

    }

}

/**

 * Admin setting for Internet domain socket host, adds verification.

 *

 * @package    antivirus_clamav

 * @copyright  2019 Didier Raboud, Liip AG.

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class antivirus_clamav_tcpsockethost_setting extends antivirus_clamav_socket_setting {

    /**

     * Validate data.

     *

     * This ensures that Internet domain socket setting is correct and ClamAV is running.

     *

     * @param string $data

     * @return mixed True on success, else error message.

     */

    public function validate($data) {

        $result = parent::validate($data);

        if ($result !== true) {

            return $result;

        }

        $runningmethod = get_config('antivirus_clamav', 'runningmethod');

        $tcpport = get_config('antivirus_clamav', 'tcpsocketport');

        if ($tcpport === false) {

            $tcpport = 3310;

        }

        if ($runningmethod === 'tcpsocket') {

            return $this->validate_clamav_socket('tcp://' . $data . ':' . $tcpport);

        }

        return true;

    }

}