openwrt-packages-dist/net/openvpn/files/etc/openvpn.user

#!/bin/sh
#
# This file is interpreted as shell script.
# Put your custom openvpn action here, they will
# be executed with each opevnp event.
#
# $ACTION
#      <down>    down action is generated after the TUN/TAP device is closed
#      <up>      up action is generated after the TUN/TAP device is opened
# $INSTANCE  Name of the openvpn instance which went up or down