134 lines
4.0 KiB
PHP
134 lines
4.0 KiB
PHP
<?php
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/**
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* ---------------------------------------------------------------------
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* GLPI - Gestionnaire Libre de Parc Informatique
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* Copyright (C) 2015-2020 Teclib' and contributors.
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*
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* http://glpi-project.org
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*
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* based on GLPI - Gestionnaire Libre de Parc Informatique
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* Copyright (C) 2003-2014 by the INDEPNET Development Team.
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*
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* ---------------------------------------------------------------------
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*
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* LICENSE
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*
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* This file is part of GLPI.
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*
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* GLPI is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GLPI is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GLPI. If not, see <http://www.gnu.org/licenses/>.
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* ---------------------------------------------------------------------
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* */
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if (!defined('GLPI_ROOT')) {
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die("Sorry. You can't access this file directly");
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}
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/// Class IPNetmask
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/// since version 0.84
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class IPNetmask extends IPAddress {
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static protected $notable = true;
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/**
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* @param $ipnetmask (default '')
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* @param $version (default 0)
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**/
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function __construct($ipnetmask = '', $version = 0) {
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// First, be sure that the parent is correctly initialised
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parent::__construct();
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// If $ipnetmask if empty, then, empty netmask !
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if ($ipnetmask != '') {
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// If $ipnetmask if an IPNetmask, then just clone it
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if ($ipnetmask instanceof IPNetmask) {
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$this->version = $ipnetmask->version;
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$this->textual = $ipnetmask->textual;
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$this->binary = $ipnetmask->binary;
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$this->fields = $ipnetmask->fields;
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} else {
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// Else, check a binary then a string
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if (!$this->setAddressFromBinary($ipnetmask)) {
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$this->setNetmaskFromString($ipnetmask, $version);
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}
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}
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}
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}
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static function getTypeName($nb = 0) {
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return _n('Subnet mask', 'Subnet masks', $nb);
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}
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/**
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* \brief Create a Netmask from string
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*
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* Create a binary Netmask from dot notation (for instance : 255.255.255.0) or
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* integer (for instance /24). Rely on setAddressFromString()
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*
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* @param $netmask string netmask defined as textual
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* @param $version integer =4 or =6 : version of IP protocol
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*
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* @return false if the netmask is not valid or if it does not correspond to version
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**/
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function setNetmaskFromString($netmask, $version) {
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if (is_numeric($netmask)) {
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if ($netmask < 0) {
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return false;
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}
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// Transform the number of bits to IPv6 netmasks ...
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$nbBits = $netmask + (($version == 4) ? 96 : 0);
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if ($nbBits > 128) {
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return false;
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}
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$bits = str_repeat("1", $nbBits).str_repeat("0", 128 - $nbBits);
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$this->version = $version;
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$this->textual = $netmask;
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$this->binary = [];
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for ($i = 0; $i < 4; $i++) {
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$localBits = substr($bits, 32 * $i, 32);
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$this->binary[] = bindec($localBits);
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}
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} else {
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if (!$netmask = $this->setAddressFromString($netmask)) {
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return false;
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}
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if ($version != $this->getVersion()) {
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return false;
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}
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if ($version == 4) {
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for ($i = 0; $i < 3; $i++) {
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$this->binary[$i] = 0xffffffff;
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}
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}
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}
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if ($version == 4) {
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$mask = decbin($this->binary[3]);
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$textual = [];
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for ($i = 0; $i < 4; $i++) {
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$textual[] = bindec(substr($mask, 8 * $i, 8));
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}
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$this->textual = implode(".", $textual);
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}
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return true;
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}
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}
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