diff --git a/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
new file mode 100644
index 0000000..5293ce1
--- /dev/null
+++ b/package/base-files/files/lib/functions/uci-defaults.sh
@@ -0,0 +1,791 @@
+. /lib/functions.sh
+. /usr/share/libubox/jshn.sh
+
+json_select_array() {
+	local _json_no_warning=1
+
+	json_select "$1"
+	[ $? = 0 ] && return
+
+	json_add_array "$1"
+	json_close_array
+
+	json_select "$1"
+}
+
+json_select_object() {
+	local _json_no_warning=1
+
+	json_select "$1"
+	[ $? = 0 ] && return
+
+	json_add_object "$1"
+	json_close_object
+
+	json_select "$1"
+}
+
+ucidef_set_interface() {
+	local network=$1; shift
+
+	[ -z "$network" ] && return
+
+	json_select_object network
+	json_select_object "$network"
+
+	while [ -n "$1" ]; do
+		local opt=$1; shift
+		local val=$1; shift
+
+		[ -n "$opt" -a -n "$val" ] || break
+
+		[ "$opt" = "device" -a "$val" != "${val/ //}" ] && {
+			json_select_array "ports"
+			for e in $val; do json_add_string "" "$e"; done
+			json_close_array
+		} || {
+			json_add_string "$opt" "$val"
+		}
+	done
+
+	if ! json_is_a protocol string; then
+		case "$network" in
+			lan) json_add_string protocol static ;;
+			wan) json_add_string protocol dhcp ;;
+			*) json_add_string protocol none ;;
+		esac
+	fi
+
+	json_select ..
+	json_select ..
+}
+
+ucidef_set_board_id() {
+	json_select_object model
+	json_add_string id "$1"
+	json_select ..
+}
+
+ucidef_set_model_name() {
+	json_select_object model
+	json_add_string name "$1"
+	json_select ..
+}
+
+ucidef_set_compat_version() {
+	json_select_object system
+	json_add_string compat_version "${1:-1.0}"
+	json_select ..
+}
+
+ucidef_set_interface_lan() {
+	ucidef_set_interface "lan" device "$1" protocol "${2:-static}"
+}
+
+ucidef_set_interface_wan() {
+	ucidef_set_interface "wan" device "$1" protocol "${2:-dhcp}"
+}
+
+ucidef_set_interfaces_lan_wan() {
+	local lan_if="$1"
+	local wan_if="$2"
+
+	ucidef_set_interface_lan "$lan_if"
+	ucidef_set_interface_wan "$wan_if"
+}
+
+ucidef_set_bridge_device() {
+	json_select_object bridge
+	json_add_string name "${1:-switch0}"
+	json_select ..
+}
+
+ucidef_set_bridge_mac() {
+	json_select_object bridge
+	json_add_string macaddr "${1}"
+	json_select ..
+}
+
+_ucidef_set_network_device_common() {
+	json_select_object "network_device"
+	json_select_object "${1}"
+	json_add_string "${2}" "${3}"
+	json_select ..
+	json_select ..
+}
+
+ucidef_set_network_device_mac() {
+	_ucidef_set_network_device_common $1 macaddr $2
+}
+
+ucidef_set_network_device_path() {
+	_ucidef_set_network_device_common $1 path $2
+}
+
+ucidef_set_network_device_path_port() {
+	_ucidef_set_network_device_common $1 path $2
+	_ucidef_set_network_device_common $1 port $3
+}
+
+ucidef_set_network_device_gro() {
+	_ucidef_set_network_device_common $1 gro $2
+}
+
+ucidef_set_network_device_conduit() {
+	_ucidef_set_network_device_common $1 conduit $2
+}
+
+_ucidef_add_switch_port() {
+	# inherited: $num $device $need_tag $want_untag $role $index $prev_role
+	# inherited: $n_cpu $n_ports $n_vlan $cpu0 $cpu1 $cpu2 $cpu3 $cpu4 $cpu5
+
+	n_ports=$((n_ports + 1))
+
+	json_select_array ports
+		json_add_object
+			json_add_int num "$num"
+			[ -n "$device"     ] && json_add_string  device     "$device"
+			[ -n "$need_tag"   ] && json_add_boolean need_tag   "$need_tag"
+			[ -n "$want_untag" ] && json_add_boolean want_untag "$want_untag"
+			[ -n "$role"       ] && json_add_string  role       "$role"
+			[ -n "$index"      ] && json_add_int     index      "$index"
+		json_close_object
+	json_select ..
+
+	# record pointer to cpu entry for lookup in _ucidef_finish_switch_roles()
+	[ -n "$device" ] && {
+		export "cpu$n_cpu=$n_ports"
+		n_cpu=$((n_cpu + 1))
+	}
+
+	# create/append object to role list
+	[ -n "$role" ] && {
+		json_select_array roles
+
+		if [ "$role" != "$prev_role" ]; then
+			json_add_object
+				json_add_string role "$role"
+				json_add_string ports "$num"
+			json_close_object
+
+			prev_role="$role"
+			n_vlan=$((n_vlan + 1))
+		else
+			json_select_object "$n_vlan"
+				json_get_var port ports
+				json_add_string ports "$port $num"
+			json_select ..
+		fi
+
+		json_select ..
+	}
+}
+
+_ucidef_finish_switch_roles() {
+	# inherited: $name $n_cpu $n_vlan $cpu0 $cpu1 $cpu2 $cpu3 $cpu4 $cpu5
+	local index role roles num device need_tag want_untag port ports
+
+	json_select switch
+		json_select "$name"
+			json_get_keys roles roles
+		json_select ..
+	json_select ..
+
+	for index in $roles; do
+		eval "port=\$cpu$(((index - 1) % n_cpu))"
+
+		json_select switch
+			json_select "$name"
+				json_select ports
+					json_select "$port"
+						json_get_vars num device need_tag want_untag
+					json_select ..
+				json_select ..
+
+				if [ ${need_tag:-0} -eq 1 -o ${want_untag:-0} -ne 1 ]; then
+					num="${num}t"
+					device="${device}.${index}"
+				fi
+
+				json_select roles
+					json_select "$index"
+						json_get_vars role ports
+						json_add_string ports "$ports $num"
+						json_add_string device "$device"
+					json_select ..
+				json_select ..
+			json_select ..
+		json_select ..
+
+		json_select_object network
+			local devices
+
+			json_select_object "$role"
+				# attach previous interfaces (for multi-switch devices)
+				json_get_var devices device
+				if ! list_contains devices "$device"; then
+					devices="${devices:+$devices }$device"
+				fi
+			json_select ..
+		json_select ..
+
+		ucidef_set_interface "$role" device "$devices"
+	done
+}
+
+ucidef_set_ar8xxx_switch_mib() {
+	local name="$1"
+	local type="$2"
+	local interval="$3"
+
+	json_select_object switch
+		json_select_object "$name"
+			json_add_int ar8xxx_mib_type $type
+			json_add_int ar8xxx_mib_poll_interval $interval
+		json_select ..
+	json_select ..
+}
+
+ucidef_add_switch() {
+	local name="$1"; shift
+	local port num role device index need_tag prev_role
+	local cpu0 cpu1 cpu2 cpu3 cpu4 cpu5
+	local n_cpu=0 n_vlan=0 n_ports=0
+
+	json_select_object switch
+		json_select_object "$name"
+			json_add_boolean enable 1
+			json_add_boolean reset 1
+
+			for port in "$@"; do
+				case "$port" in
+					[0-9]*@*)
+						num="${port%%@*}"
+						device="${port##*@}"
+						need_tag=0
+						want_untag=0
+						[ "${num%t}" != "$num" ] && {
+							num="${num%t}"
+							need_tag=1
+						}
+						[ "${num%u}" != "$num" ] && {
+							num="${num%u}"
+							want_untag=1
+						}
+					;;
+					[0-9]*:*:[0-9]*)
+						num="${port%%:*}"
+						index="${port##*:}"
+						role="${port#[0-9]*:}"; role="${role%:*}"
+					;;
+					[0-9]*:*)
+						num="${port%%:*}"
+						role="${port##*:}"
+					;;
+				esac
+
+				if [ -n "$num" ] && [ -n "$device$role" ]; then
+					_ucidef_add_switch_port
+				fi
+
+				unset num device role index need_tag want_untag
+			done
+		json_select ..
+	json_select ..
+
+	_ucidef_finish_switch_roles
+}
+
+ucidef_add_switch_attr() {
+	local name="$1"
+	local key="$2"
+	local val="$3"
+
+	json_select_object switch
+		json_select_object "$name"
+
+		case "$val" in
+			true|false) [ "$val" != "true" ]; json_add_boolean "$key" $? ;;
+			[0-9]) json_add_int "$key" "$val" ;;
+			*) json_add_string "$key" "$val" ;;
+		esac
+
+		json_select ..
+	json_select ..
+}
+
+ucidef_add_switch_port_attr() {
+	local name="$1"
+	local port="$2"
+	local key="$3"
+	local val="$4"
+	local ports i num
+
+	json_select_object switch
+	json_select_object "$name"
+
+	json_get_keys ports ports
+	json_select_array ports
+
+	for i in $ports; do
+		json_select "$i"
+		json_get_var num num
+
+		if [ -n "$num" ] && [ $num -eq $port ]; then
+			json_select_object attr
+
+			case "$val" in
+				true|false) [ "$val" != "true" ]; json_add_boolean "$key" $? ;;
+				[0-9]) json_add_int "$key" "$val" ;;
+				*) json_add_string "$key" "$val" ;;
+			esac
+
+			json_select ..
+		fi
+
+		json_select ..
+	done
+
+	json_select ..
+	json_select ..
+	json_select ..
+}
+
+ucidef_set_interface_macaddr() {
+	local network="$1"
+	local macaddr="$2"
+
+	ucidef_set_interface "$network" macaddr "$macaddr"
+}
+
+ucidef_set_label_macaddr() {
+	local macaddr="$1"
+
+	json_select_object system
+		json_add_string label_macaddr "$macaddr"
+	json_select ..
+}
+
+ucidef_add_atm_bridge() {
+	local vpi="$1"
+	local vci="$2"
+	local encaps="$3"
+	local payload="$4"
+	local nameprefix="$5"
+
+	json_select_object dsl
+		json_select_object atmbridge
+			json_add_int vpi "$vpi"
+			json_add_int vci "$vci"
+			json_add_string encaps "$encaps"
+			json_add_string payload "$payload"
+			json_add_string nameprefix "$nameprefix"
+		json_select ..
+	json_select ..
+}
+
+ucidef_add_adsl_modem() {
+	local annex="$1"
+	local firmware="$2"
+
+	json_select_object dsl
+		json_select_object modem
+			json_add_string type "adsl"
+			json_add_string annex "$annex"
+			json_add_string firmware "$firmware"
+		json_select ..
+	json_select ..
+}
+
+ucidef_add_vdsl_modem() {
+	local annex="$1"
+	local tone="$2"
+	local xfer_mode="$3"
+
+	json_select_object dsl
+		json_select_object modem
+			json_add_string type "vdsl"
+			json_add_string annex "$annex"
+			json_add_string tone "$tone"
+			json_add_string xfer_mode "$xfer_mode"
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_led_ataport() {
+	_ucidef_set_led_trigger "$1" "$2" "$3" ata"$4"
+}
+
+_ucidef_set_led_common() {
+	local cfg="led_$1"
+	local name="$2"
+	local sysfs="$3"
+
+	json_select_object led
+
+	json_select_object "$1"
+	json_add_string name "$name"
+	json_add_string sysfs "$sysfs"
+}
+
+ucidef_set_led_default() {
+	local default="$4"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string default "$default"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_heartbeat() {
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string trigger heartbeat
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_gpio() {
+	local gpio="$4"
+	local inverted="$5"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string trigger "$trigger"
+	json_add_string type gpio
+	json_add_int gpio "$gpio"
+	json_add_boolean inverted "$inverted"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_ide() {
+	_ucidef_set_led_trigger "$1" "$2" "$3" disk-activity
+}
+
+ucidef_set_led_netdev() {
+	local dev="$4"
+	local mode="${5:-link tx rx}"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string type netdev
+	json_add_string device "$dev"
+	json_add_string mode "$mode"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_oneshot() {
+	_ucidef_set_led_timer $1 $2 $3 "oneshot" $4 $5
+}
+
+ucidef_set_led_portstate() {
+	local port_state="$4"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string trigger port_state
+	json_add_string type portstate
+	json_add_string port_state "$port_state"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_rssi() {
+	local iface="$4"
+	local minq="$5"
+	local maxq="$6"
+	local offset="${7:-0}"
+	local factor="${8:-1}"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string type rssi
+	json_add_string name "$name"
+	json_add_string iface "$iface"
+	json_add_string minq "$minq"
+	json_add_string maxq "$maxq"
+	json_add_string offset "$offset"
+	json_add_string factor "$factor"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_switch() {
+	local trigger_name="$4"
+	local port_mask="$5"
+	local speed_mask="$6"
+	local mode="$7"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string trigger "$trigger_name"
+	json_add_string type switch
+	json_add_string mode "$mode"
+	json_add_string port_mask "$port_mask"
+	json_add_string speed_mask "$speed_mask"
+	json_select ..
+
+	json_select ..
+}
+
+_ucidef_set_led_timer() {
+	local trigger_name="$4"
+	local delayon="$5"
+	local delayoff="$6"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string type "$trigger_name"
+	json_add_string trigger "$trigger_name"
+	json_add_int delayon "$delayon"
+	json_add_int delayoff "$delayoff"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_timer() {
+	_ucidef_set_led_timer $1 $2 $3 "timer" $4 $5
+}
+
+_ucidef_set_led_trigger() {
+	local trigger_name="$4"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string trigger "$trigger_name"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_usbdev() {
+	local dev="$4"
+
+	_ucidef_set_led_common "$1" "$2" "$3"
+
+	json_add_string type usb
+	json_add_string device "$dev"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_usbhost() {
+	_ucidef_set_led_trigger "$1" "$2" "$3" usb-host
+}
+
+ucidef_set_led_usbport() {
+	local obj="$1"
+	local name="$2"
+	local sysfs="$3"
+	shift
+	shift
+	shift
+
+	_ucidef_set_led_common "$obj" "$name" "$sysfs"
+
+	json_add_string type usbport
+	json_select_array ports
+		for port in "$@"; do
+			json_add_string port "$port"
+		done
+	json_select ..
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_set_led_wlan() {
+	_ucidef_set_led_trigger "$1" "$2" "$3" "$4"
+}
+
+ucidef_set_rssimon() {
+	local dev="$1"
+	local refresh="$2"
+	local threshold="$3"
+
+	json_select_object rssimon
+
+	json_select_object "$dev"
+	[ -n "$refresh" ] && json_add_int refresh "$refresh"
+	[ -n "$threshold" ] && json_add_int threshold "$threshold"
+	json_select ..
+
+	json_select ..
+}
+
+ucidef_add_gpio_switch() {
+	local cfg="$1"
+	local name="$2"
+	local pin="$3"
+	local default="${4:-0}"
+
+	json_select_object gpioswitch
+		json_select_object "$cfg"
+			json_add_string name "$name"
+			json_add_string pin "$pin"
+			json_add_int default "$default"
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_hostname() {
+	local hostname="$1"
+
+	json_select_object system
+		json_add_string hostname "$hostname"
+	json_select ..
+}
+
+ucidef_set_timezone() {
+	local timezone="$1"
+	json_select_object system
+		json_add_string timezone "$timezone"
+	json_select ..
+}
+
+ucidef_set_wireless() {
+	local band="$1"
+	local ssid="$2"
+	local encryption="$3"
+	local key="$4"
+
+	case "$band" in
+	all|2g|5g|6g) ;;
+	*) return;;
+	esac
+	[ -z "$ssid" ] && return
+
+	json_select_object wlan
+		json_select_object defaults
+			json_select_object ssids
+				json_select_object "$band"
+					json_add_string ssid "$ssid"
+					[ -n "$encryption" ] && json_add_string encryption "$encryption"
+					[ -n "$key" ] && json_add_string key "$key"
+				json_select ..
+			json_select ..
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_country() {
+	local country="$1"
+
+	json_select_object wlan
+		json_select_object defaults
+			json_add_string country "$country"
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_wireless_mac_count() {
+	local band="$1"
+	local mac_count="$2"
+
+	case "$band" in
+	2g|5g|6g) ;;
+	*) return;;
+	esac
+	[ -z "$mac_count" ] && return
+
+	json_select_object wlan
+		json_select_object defaults
+			json_select_object ssids
+				json_select_object "$band"
+					json_add_string mac_count "$mac_count"
+				json_select ..
+			json_select ..
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_root_password_plain() {
+	local passwd="$1"
+	json_select_object credentials
+		json_add_string root_password_plain "$passwd"
+	json_select ..
+}
+
+ucidef_set_root_password_hash() {
+	local passwd="$1"
+	json_select_object credentials
+		json_add_string root_password_hash "$passwd"
+	json_select ..
+}
+
+ucidef_set_ssh_authorized_key() {
+	local ssh_key="$1"
+	json_select_object credentials
+		json_select_array ssh_authorized_keys
+			json_add_string "" "$ssh_key"
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_ntpserver() {
+	local server
+
+	json_select_object system
+		json_select_array ntpserver
+			for server in "$@"; do
+				json_add_string "" "$server"
+			done
+		json_select ..
+	json_select ..
+}
+
+ucidef_set_poe() {
+	json_select_object poe
+		json_add_string "budget" "$1"
+		json_select_array ports
+			for port in $2; do
+				json_add_string "" "$port"
+			done
+		json_select ..
+	json_select ..
+}
+
+ucidef_add_wlan() {
+	local path="$1"; shift
+
+	ucidef_wlan_idx=${ucidef_wlan_idx:-0}
+
+	json_select_object wlan
+	json_select_object "wl$ucidef_wlan_idx"
+	json_add_string path "$path"
+	json_add_fields "$@"
+	json_select ..
+	json_select ..
+
+	ucidef_wlan_idx="$((ucidef_wlan_idx + 1))"
+}
+
+board_config_update() {
+	json_init
+	[ -f ${CFG} ] && json_load "$(cat ${CFG})"
+
+	# auto-initialize model id and name if applicable
+	if ! json_is_a model object; then
+		json_select_object model
+			[ -f "/tmp/sysinfo/board_name" ] && \
+				json_add_string id "$(cat /tmp/sysinfo/board_name)"
+			[ -f "/tmp/sysinfo/model" ] && \
+				json_add_string name "$(cat /tmp/sysinfo/model)"
+		json_select ..
+	fi
+}
+
+board_config_flush() {
+	json_dump -i -o ${CFG}
+}