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#!/bin/sh
# Script for using udhcpc (started by ifup) with wpa_supplicant.
#
# Distributed under the same license as wpa_supplicant itself.
# Copyright (c) 2015,2018 Sören Tempel <soeren+alpine@soeren-tempel.net>
if [ $# -ne 2 ]; then
logger -t wpa_cli "this script should be called from wpa_cli(8)"
exit 1
fi
IFNAME="${1}"
ACTION="${2}"
SIGNAL=""
DHCPID=""
# PID file created by the busybox ifup applet for udhcpc.
DHCPIDFILE="/var/run/udhcpc.${IFNAME}.pid"
if [ ! -e "${DHCPIDFILE}" ]; then
logger -t wpa_cli "udhcpc isn't running for interface '${IFNAME}'"
exit 1
fi
logger -t wpa_cli "interface ${IFNAME} ${ACTION}"
case "${ACTION}" in
CONNECTED)
SIGNAL="USR1"
;;
DISCONNECTED)
SIGNAL="USR2"
;;
*)
logger -t wpa_cli "unknown action '${ACTION}'"
exit 1
esac
read -r DHCPID < "${DHCPIDFILE}"
kill -${SIGNAL} "${DHCPID}" || logger -t wpa_cli \
"Couldn't send '${SIGNAL}' to '${DHCPID}'"
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