--- /dev/null
+#!/bin/bash
+###############################################################################
+# #
+# IPFire.org - A linux based firewall #
+# Copyright (C) 2010 Michael Tremer & Christian Schmidt #
+# #
+# 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 of the License, 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/>. #
+# #
+###############################################################################
+
+function ip_split_prefix() {
+ local address=${1}
+
+ assert isset address
+
+ echo "${address%%/*}"
+}
+
+function ip_get_prefix() {
+ local address=${1}
+
+ assert isset address
+
+ echo "${address##*/}"
+}
+
+function ip_detect_protocol() {
+ local address=${1}
+
+ assert isset address
+
+ local protocol
+ for protocol in ipv4 ipv6; do
+ if ${protocol}_is_valid ${address}; then
+ echo "${protocol}"
+ return ${EXIT_OK}
+ fi
+ done
+
+ return ${EXIT_ERROR}
+}