#!/bin/sh  /etc/rc.common
#
# Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

NSS_IPSEC_LOG_FILE=/tmp/.nss_ipsec_log
NSS_IPSEC_LOG_STR_ECM="ECM_Loaded"

ecm_load () {
	if [ ! -d /sys/module/ecm ]; then
		/etc/init.d/qca-nss-ecm start
		if [ -d /sys/module/ecm ]; then
			echo ${NSS_IPSEC_LOG_STR_ECM} >> ${NSS_IPSEC_LOG_FILE}
		fi
	fi
}

ecm_unload () {
	if [ -f /tmp/.nss_ipsec_log ]; then
		str=`grep ${NSS_IPSEC_LOG_STR_ECM} ${NSS_IPSEC_LOG_FILE}`
		if [[ $str == ${NSS_IPSEC_LOG_STR_ECM} ]]; then
			/etc/init.d/qca-nss-ecm stop
			`sed 's/${NSS_IPSEC_LOG_STR_ECM}/ /g' $NSS_IPSEC_LOG_FILE >  $NSS_IPSEC_LOG_FILE`
		fi
	fi
}

ecm_disable() {

	if [ ! -d /sys/module/ecm ]; then
		return;
	fi

	echo 1 > /sys/kernel/debug/ecm/front_end_ipv4_stop
	echo 1 > /sys/kernel/debug/ecm/front_end_ipv6_stop
	echo 1 > /sys/kernel/debug/ecm/ecm_db/defunct_all
	sleep 2
}

ecm_enable() {
	if [ ! -d /sys/module/ecm ]; then
		return;
	fi

	echo 0 > /sys/kernel/debug/ecm/ecm_db/defunct_all
	echo 0 > /sys/kernel/debug/ecm/front_end_ipv4_stop
	echo 0 > /sys/kernel/debug/ecm/front_end_ipv6_stop
}

start() {
	ecm_load

	local kernel_version=$(uname -r)

	insmod /lib/modules/${kernel_version}/qca-nss-ipsec-klips.ko
	if [ "$?" -gt 0 ]; then
		echo "Failed to load plugin. Please start ecm if not done already"
		ecm_enable
		return
	fi

	/etc/init.d/ipsec start
	sleep 2
	ipsec eroute

	ecm_enable
}

stop() {
	ecm_disable

	/etc/init.d/ipsec stop
	rmmod qca-nss-ipsec-klips

	ecm_unload
}

restart() {
	stop
	start
}