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<?php |
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/** |
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* Copyright 2015 François Kooman <[email protected]>. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace fkooman\VPN\Server; |
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use InvalidArgumentException; |
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class IP |
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{ |
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/** @var string */ |
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private $ip; |
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/** @var int */ |
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private $prefix; |
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public function __construct($cidrIp) |
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{ |
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// must be of form IP/PREFIX |
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if (1 !== substr_count($cidrIp, '/')) { |
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throw new InvalidArgumentException('not in CIDR format'); |
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} |
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list($ip, $prefix) = explode('/', $cidrIp); |
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// check IP |
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self::validateIP($ip); |
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$this->ip = $ip; |
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// check prefix |
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if (!is_numeric($prefix) || 0 > $prefix || 32 < $prefix) { |
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throw new InvalidArgumentException('invalid prefix'); |
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} |
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$this->prefix = intval($prefix); |
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} |
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public function getNetmask() |
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{ |
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return long2ip(-1 << (32 - $this->prefix)); |
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} |
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public function getNetwork() |
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{ |
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return long2ip(ip2long($this->ip) & ip2long($this->getNetmask())); |
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} |
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public function getFirstHost() |
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{ |
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return long2ip(ip2long($this->getNetwork()) + 1); |
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} |
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public function getLastHost() |
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{ |
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return long2ip(ip2long($this->getBroadcast()) + -1); |
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} |
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public function getBroadcast() |
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{ |
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return long2ip( |
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ip2long($this->getNetwork()) | ~ip2long($this->getNetmask()) |
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); |
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} |
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/** |
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* network and broadcast addresses are not allowed. |
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*/ |
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public function inRange($ip) |
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{ |
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self::validateIP($ip); |
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$longIp = ip2long($ip); |
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$startIp = ip2long($this->getNetwork()); |
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$endIp = ip2long($this->getBroadcast()); |
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return $longIp > $startIp && $longIp < $endIp; |
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} |
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private static function validateIP($ip) |
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{ |
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if (false === filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { |
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throw new InvalidArgumentException('invalid IP address'); |
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} |
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} |
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} |
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eduVPN /
vpn-server-api
