<?php /* ** Copyright (C) 2001-2025 Zabbix SIA ** ** This program is free software: you can redistribute it and/or modify it under the terms of ** the GNU Affero General Public License as published by the Free Software Foundation, version 3. ** ** This program 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 Affero General Public License for more details. ** ** You should have received a copy of the GNU Affero General Public License along with this program. ** If not, see <https://www.gnu.org/licenses/>. **/ /** * A parser for IPv4 address. */ class CIPv4Parser extends CParser { /** * @param string $source * @param int $pos * * @return int */ public function parse($source, $pos = 0) { $this->length = 0; $this->match = ''; if (!preg_match('/^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/', substr($source, $pos), $matches)) { return self::PARSE_FAIL; } for ($i = 1; $i <= 4; $i++) { if (strlen($matches[$i]) > 3 || $matches[$i] > 255) { return self::PARSE_FAIL; } } $this->match = $matches[0]; $this->length = strlen($this->match); return (isset($source[$pos + $this->length]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS); } }