1 files changed, 116 insertions, 0 deletions
diff --git a/lib/rcscripts/net.modules.d/tuntap b/lib/rcscripts/net.modules.d/tuntap
new file mode 100644
index 0000000..150b892
--- /dev/null
+++ b/lib/rcscripts/net.modules.d/tuntap
@@ -0,0 +1,116 @@
+#!/bin/bash
+# Copyright (c) 2004-2005 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# Contributed by Roy Marples (uberlord@gentoo.org)
+
+# Fix any potential localisation problems
+# Note that LC_ALL trumps LC_anything_else according to locale(7)
+tunctl() {
+	LC_ALL=C /usr/bin/tunctl "$@"
+}
+
+# char* tuntap_provides(void)
+#
+# Returns a string to change module definition for starting up
+tuntap_provides() {
+	echo "tuntap"
+}
+
+# void tuntap_depend(void)
+#
+# Sets up the dependancies for the module
+tuntap_depend() {
+	after interface
+	before dhcp
+}
+
+# bool tuntap_check_installed(void)
+#
+# Returns 1 if tuntap is installed, otherwise 0
+tuntap_check_installed() {
+	[[ -x /usr/bin/tunctl ]] && return 0
+	${1:-false} && eerror "For TunTap support, emerge sys-apps/usermode-utilities"
+	return 1
+}
+
+# bool tuntap_check_depends(void)
+#
+# Checks to see if we have the needed functions
+tuntap_check_depends() {
+	local f
+
+	for f in interface_exists interface_type; do
+		[[ $( type -t "${f}" ) == "function" ]] && continue
+		eerror "tuntap: missing required function ${f}\n"
+		return 1
+	done
+
+	return 0
+}
+
+# bool tuntap_check_kernel(void)
+#
+# Checks to see if the tun is present - if not try and load it
+# Returns 1 if there is a problem
+tuntap_check_kernel() {
+	[[ -a /dev/net/tun ]] && return 0
+	/sbin/modprobe tun && sleep 1
+	[[ -a /dev/net/tun ]] && return 0
+	eerror "TUN/TAP support is not present in this kernel"
+	return 1
+}
+
+# char* tuntap_get_vars(char *interface)
+#
+# Returns a string spaced with possible user set
+# configuration variables
+tuntap_get_vars() {
+	echo "tunctl_$1"
+}
+
+# bool tuntap_pre_start(char *iface)
+#
+# Create the device, give it the right perms
+tuntap_pre_start() {
+	local iface="$1" opts ifvar=$( bash_variable "$1" )
+	local itype=$( interface_type "${iface}" )
+
+	# Check that we are a valid tun/tap interface
+	# NOTE - the name can be anything as we define it
+	# but for simplicity in the config we require either
+	# tun or tap
+	[[ ${itype} != "tun" && ${itype} != "tap" ]] && return 0
+
+	tuntap_check_kernel || return 1
+
+	# Get our options
+	eval opts=\"\$\{tunctl_${ifvar}\}\"
+
+	ebegin "Creating Tun/Tap interface ${iface}"
+	tunctl ${opts} -t "${iface}"
+	eend "$?" || return 1
+
+	return 0
+}
+
+# bool tuntap_stop(char *iface)
+#
+# Removes the device
+tuntap_stop() {
+	local iface="$1"
+
+	tuntap_check_installed || return 0
+	interface_exists "${iface}" || return 0
+
+	# tunctl doesn't always error on on tun/tap
+	# interfaces (mainly aliases, etc)
+	if tunctl -d "${iface}" &>/dev/null ; then
+		interface_exists "${iface}" \
+		|| einfo "Destroyed Tun/Tap interface ${iface}"
+	fi
+
+	return 0 
+}
+
+# vim:ts=4