#!/bin/sh /etc/rc.common
# Copyright (c) 2021 OpenWrt.org

START=40

USE_PROCD=1
PROG=/usr/sbin/udhcprelay

add_device() {
	local cfg="$1"

	config_get_bool disabled "$cfg" disabled 0
	[ "$disabled" -gt 0 ] && return

	config_get name "$cfg" name
	json_add_object "$name"

	json_close_object
}

add_string() {
	json_add_string "" "$@"
}

add_array() {
	local cfg="$1"
	local name="$2"

	json_add_array "$name"
	config_list_foreach "$cfg" "$name" add_string
	json_close_array
}

add_bridge() {
	local cfg="$1"

	config_get_bool disabled "$cfg" disabled 0
	[ "$disabled" -gt 0 ] && return

	config_get name "$cfg" name
	json_add_object "$name"

	add_array "$cfg" vlans
	add_array "$cfg" ignore
	add_array "$cfg" upstream

	json_close_object
}

reload_service() {
	json_init

	config_load dhcprelay

	json_add_object devices
	config_foreach add_device device 
	json_close_object

	json_add_object bridges
	config_foreach add_bridge bridge 
	json_close_object

	ubus call dhcprelay config "$(json_dump)"
}

service_triggers() {
	procd_add_reload_trigger dhcprelay
}

start_service() {
	procd_open_instance
	procd_set_param command "$PROG"
	procd_set_param respawn
	procd_set_param limits core="unlimited"
	procd_close_instance
}

service_started() {
	ubus -t 10 wait_for dhcprelay
	[ $? = 0 ] && reload_service
}