#!/bin/sh /etc/rc.common
# vim: set noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :
# Copyright (C) 2015 ovh.com
# Copyright (C) 2017 Ycarus (Yannick Chabanois) <ycarus@zugaina.org>

START=90
STOP=10

USE_PROCD=1
PROG_NAME=glorytun-udp
PROG=/usr/sbin/${PROG_NAME}

_log() {
	logger -p daemon.info -t ${PROG_NAME} "$@"
}

_err() {
	logger -p daemon.err -t ${PROG_NAME} "$@"
}

validate_section() {
	uci_validate_section glorytun glorytun "${1}" \
		'enable:bool:0'       \
		'key:string'          \
		'host:host'           \
		'port:port'           \
		'proto:string'        \
		'bind:string:0.0.0.0' \
		'bindport:port'  \
		'mtu:uinteger:1450'   \
		'mtuauto:bool:0'      \
		'chacha20:bool:0'     \
		'dev:string'
}

start_instance() {
	local enable key host port listener proto bind bindport mtu mtuauto chacha20 dev

	validate_section "${1}" || {
		_err "validation failed"
		return 1
	}

	[ "${enable}" = "1" ] || return 1
	[ "${proto}" = "udp" ] || return 1

	[ -n "${key}" ] || return 1
	[ "${key}" != "secretkey" ] || return 1
	[ -n "${port}" ] || return 1
	[ -n "${dev}" ] || return 1

	echo "${key}" > /tmp/${PROG_NAME}-${1}.key
	key=""

	if [ "$(uci -q get network.omrvpn)" != "" ]; then
		uci -q set network.omrvpn.ifname=$dev
		uci -q commit
	fi

	_log "starting ${PROG_NAME} ${1} instance $*"

	procd_open_instance

	procd_set_param command ${PROG} \
		${bind:+bind "$bind"} \
		${bindport:+ "$bindport"} \
		${host:+to "$host"} \
		${port:+ "$port"} \
		${dev:+dev "$dev"} \
		keyfile /tmp/${PROG_NAME}-${1}.key \
		persist

	[ "${chacha20}" = "1" ] && procd_append_param command chacha

	procd_set_param respawn 0 30 0
	procd_set_param file /tmp/${PROG_NAME}-${1}.key

	procd_set_param stdout 1
	procd_set_param stderr 1

	procd_close_instance

	#config_load network
	#config_foreach add_glorytun_path interface

}

add_glorytun_path() {
	case "$1" in
		loopback|lan|if0|*tun*|ifb*) return ;;
	esac
	local multipath
	network_get_ipaddr ipaddr "$1"
	config_get multipath "$1" multipath "off"
	case "$multipath" in
		master|on) glorytun-udp path "$ipaddr" dev $dev up ;;
		backup) glorytun-udp path "$ipaddr" dev $dev backup ;;
		*) glorytun-udp path "$ipaddr" dev $dev down ;;
	esac
}

start_service() {
	local dev
	config_load glorytun
	config_foreach start_instance glorytun
}

reload_service() {
	stop
	start
}

service_triggers() {
	procd_add_reload_trigger glorytun-udp network
}