/* Implementation of match_cidr call
   Copyright (C) 2007 Sergey Poznyakoff

   This program 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, or (at your option)
   any later version.

   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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */

#include_once <status.mfh>

#pragma regex push +extended

func match_cidr(string ipstr, string cidr) returns number
do
	number netmask

	if %cidr matches '^(([0-9]{1,3}\.){3}[0-9]{1,3})/([0-9][0-9]?)'
		return inet_aton(%ipstr) & len_to_netmask(\3) = inet_aton(\1)
	else
		throw invcidr "invalid CIDR (%cidr)"
	fi
	return 0
done

#pragma regex pop