#!/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() {
	uci -q delete openmptcprouter.$1
}
omr_intf_set() {
	config_get multipath "$1" multipath
	config_get ifname "$1" ifname
	[ -n "$(ubus call system board | jsonfilter -e '@.board_name' | grep raspberry)" ] && [ -n "$(echo $ifname | grep usb)" ] && {
		uci -q set openmptcprouter.settings.scaling_min_freq=800000
		uci -q set openmptcprouter.settings.scaling_max_freq=800000
	}
	[ -z "$multipath" ] || [ "$multipath" = "off" ] && [ "$1" != "omrvpn" ] && [ "$1" != "glorytun" ] && return

	uci -q set openmptcprouter.$1=interface
}

set_ipv6_state() {
	local disable_ipv6=$1
	local sysctl_ipv6=0
	sysctl -w net.ipv6.conf.all.disable_ipv6=$sysctl_ipv6
	sed -i 's:^net.ipv6.conf.all.disable_ipv6=[0-9]*:net.ipv6.conf.all.disable_ipv6=$sysctl_ipv6:' /etc/sysctl.d/zzz_openmptcprouter.conf
	
	uci -q set firewall.@defaults[0].disable_ipv6=$disable_ipv6
	uci -q commit firewall
	if [ "$disable_ipv6" == "1" ]; then
		uci -q set dhcp.lan.ra_default="0"
		uci -q set network.lan.ipv6="0"
	fi

	if [ "$disable_ipv6" == "1" ]; then
		uci -q delete network.lan.ipv6
		uci -q delete dhcp.lan.dhcpv6
		uci -q delete dhcp.lan.ra
		uci -q delete dhcp.lan.ra_default
		uci -q set shadowsocks-libev.hi.local_address="0.0.0.0"
	else
		uci -q set shadowsocks-libev.hi.local_address="::"
	fi
	uci -q commit shadowsocks-libev
	uci -q commit dhcp
	#if [ "$disable_ipv6" == "1" ]; then
	#	/etc/init.d/odhcpd stop >/dev/null 2>&1
	#	/etc/init.d/odhcpd disable >/dev/null 2>&1
	#fi
}

start_service() {
	local scaling_min_freq scaling_max_freq

	#config_load openmptcprouter
	#config_foreach omr_intf_del interface
	config_load network
	config_foreach omr_intf_set interface

	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 > $c/scaling_governor
		done
	}
	config_get disable_ipv6 settings disable_ipv6 "0"
	if [ "$(uci -q get firewall.@defaults[0].disable_ipv6)" != "$disable_ipv6" ]; then
		set_ipv6_state $disable_ipv6
	fi
	
	# 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' /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' /etc/sysctl.d/10-default.conf
}

reload_service() {
	rc_procd start_service
	return 0
}