#!/bin/sh /etc/rc.common
# Copyright (C) 2018 Ycarus (Yannick Chabanois) <ycarus@zugaina.org>
# Released under GPL 3. See LICENSE for the full terms.

START=5

USE_PROCD=1

omr_intf_del() {
	[ -z "$1" ] && return
	uci -q delete openmptcprouter.$1
}

omr_intf_check() {
	[ "$(uci -q get network.$1)" = "" ] && omr_intf_del $1
}

omr_intf_set() {
	local device
	local ifname
	local multipath
	config_get multipath "$1" multipath
	config_get ifname "$1" ifname

	[ -n "$ifname" ] && [ -L /sys/class/net/${ifname} ] && {
		device=$(readlink -f /sys/class/net/${ifname})
		[ "$(echo ${device} | grep virtual)" = "" ] && uci -q set network.$1.device="$device"
	}

	[ -z "$multipath" ] || [ "$multipath" = "off" ] && [ "$1" != "omrvpn" ] && [ "$1" != "glorytun" ] && return

	uci -q set openmptcprouter.$1=interface
	uci -q set openmptcprouter.$1.multipath="$multipath"
	config_get disable_ipv6 settings disable_ipv6 "0"
	if [ "$disable_ipv6" = "1" ] || [ "$1" != "omr6in4" ]; then
		uci -q set network.$1.ipv6=0
	else
		uci -q set network.$1.ipv6=1
	fi
}

start_service() {
	local scaling_min_freq scaling_max_freq

	config_load openmptcprouter
	config_foreach omr_intf_check interface
	config_load network
	config_foreach omr_intf_set interface
	uci -q commit network
	uci -q commit openmptcprouter

	[ -n "$(ubus call system board | jsonfilter -e '@.board_name' | grep raspberry)" ] && {
		# force CPU speed for RPI
		uci -q set openmptcprouter.settings.scaling_min_freq=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq | tr -d "\n")
		uci -q set openmptcprouter.settings.scaling_max_freq=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq | tr -d "\n")
		uci -q set openmptcprouter.settings.scaling_governor='performance'
	}

	[ -d /sys/devices/system/cpu/cpufreq/policy0 ] && {
		config_load openmptcprouter
		config_get scaling_min_freq settings scaling_min_freq
		[ -n "$scaling_min_freq" ] && {
			for c in $(ls -d /sys/devices/system/cpu/cpufreq/policy[0-9]*); do
				echo $scaling_min_freq > $c/scaling_min_freq
			done
		}
		config_get scaling_max_freq settings scaling_max_freq
		[ -n "$scaling_max_freq" ] && {
			for c in $(ls -d /sys/devices/system/cpu/cpufreq/policy[0-9]*); do
				echo $scaling_max_freq > $c/scaling_max_freq
			done
		}
		config_get scaling_governor settings scaling_governor
		[ -n "$scaling_governor" ] && {
			for c in $(ls -d /sys/devices/system/cpu/cpufreq/policy[0-9]*); do
				echo $scaling_governor > $c/scaling_governor
			done
		}
	}
	# remove sysctl already defined in /etc/sysctl.d/
	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' -e '/tcp_syn_retries/d' -e '/tcp_fastopen/d' -e '/tcp_retries2/d' /etc/sysctl.conf
	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' -e '/tcp_syn_retries/d' -e '/tcp_fastopen/d' -e '/tcp_retries2/d' /etc/sysctl.d/10-default.conf
}

reload_service() {
	rc_procd start_service
	return 0
}

service_triggers() {
	procd_add_reload_trigger "openmptcprouter" "network"
}