#!/bin/sh
#
# Script for loading /unloading openvpn client kernel modules
#

IPTABLES_MODULE_LIST="/usr/syno/etc.defaults/iptables_modules_list"
SERVICE="quickconnect-ovpnc"
BIN_IPTABLESTOOL="/usr/syno/bin/iptablestool"
BIN_SYNOMODULETOOL="/usr/syno/bin/synomoduletool"

. ${IPTABLES_MODULE_LIST}

Ovpnc_Mod=""
for mod in $KERNEL_MODULES_CORE; do
	if [ -e "/lib/modules/$mod" ]; then
		Ovpnc_Mod="${Ovpnc_Mod} ${mod}"
	fi
done
for mod in $KERNEL_MODULES_COMMON; do
	if [ -e "/lib/modules/$mod" ]; then
		Ovpnc_Mod="${Ovpnc_Mod} ${mod}"
	fi
done
for mod in $KERNEL_MODULES_NAT; do
	if [ -e "/lib/modules/$mod" ]; then
		Ovpnc_Mod="${Ovpnc_Mod} ${mod}"
	fi
done
for mod in $IPV6_MODULES; do
	if [ -e "/lib/modules/$mod" ]; then
		Ovpnc_Mod="${Ovpnc_Mod} ${mod}"
	fi
done
for mod in $OPENVPN_MODULES; do
	if [ -e "/lib/modules/$mod" ]; then
		Ovpnc_Mod="${Ovpnc_Mod} ${mod}"
	fi
done

reverse_modules() {
	local modules=$1
	local mod
	local ret=""

	for mod in $modules; do
	    ret="$mod $ret"
	done

	echo $ret
}

load_module() {
	local service=$1

	if [ -x ${BIN_SYNOMODULETOOL} ]; then
		${BIN_SYNOMODULETOOL} --insmod ${service} ${Ovpnc_Mod}
	elif [ -x ${BIN_IPTABLESTOOL} ]; then
		${BIN_IPTABLESTOOL} --insmod ${service} ${Ovpnc_Mod}
	fi
}

unload_module() {
	local service=$1
	local modules=`reverse_modules "${Ovpnc_Mod}"`

	if [ -x ${BIN_SYNOMODULETOOL} ]; then
		${BIN_SYNOMODULETOOL} --rmmod ${service} $modules
	elif [ -x ${BIN_IPTABLESTOOL} ]; then
		${BIN_IPTABLESTOOL} --rmmod ${service} $modules
	fi
}

case "$1" in
	unload)
		service=${SERVICE}
		if [ -n "$2" ]; then
			service=$2
		fi
		unload_module ${service}
	;;
	load)
		service=${SERVICE}
		if [ -n "$2" ]; then
			service=$2
		fi
		load_module ${service}
		;;
	*)
		echo "Usage: $0 {load|unload}"
		exit 1
esac

exit 0

# [EOF]