1/* IP validity checker. 2 Copyright (C) 2006, 2007, 2008, 2009, 2010 Jan Rafaj 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17module 'is_ip'. 18 19#pragma regex push +extended 20 21func is_ip(string ip) 22 returns number 23do 24 return ip matches '^([0-9]{1,3}\.){3}[0-9]{1,3}$' 25done 26 27#pragma regex pop 28 29