NETIFD_MAIN_DIR="${NETIFD_MAIN_DIR:-/lib/netifd}"

. /usr/share/libubox/jshn.sh
. $NETIFD_MAIN_DIR/utils.sh

CMD_UP=0
CMD_SET_DATA=1
CMD_PROCESS_ADD=2
CMD_PROCESS_KILL_ALL=3
CMD_SET_RETRY=4

add_driver() {
	return
}

wireless_setup_vif_failed() {
	local error="$1"
	echo "Interface $_w_iface setup failed: $error"
}

wireless_setup_failed() {
	local error="$1"

	echo "Device setup failed: $error"
	wireless_set_retry 0
}

prepare_key_wep() {
	local key="$1"
	local hex=1

	echo -n "$key" | grep -qE "[^a-fA-F0-9]" && hex=0
	[ "${#key}" -eq 10 -a $hex -eq 1 ] || \
	[ "${#key}" -eq 26 -a $hex -eq 1 ] || {
		[ "${key:0:2}" = "s:" ] && key="${key#s:}"
		key="$(echo -n "$key" | hexdump -ve '1/1 "%02x" ""')"
	}
	echo "$key"
}

_wdev_prepare_channel() {
	json_get_vars channel hwmode cfreq2

	auto_channel=0
	enable_ht=0
	htmode=
	hwmode="${hwmode##11}"
	hwmode_n="${hwmode##n}"

	case "$channel" in
		""|0|auto)
			channel=0
			auto_channel=1
		;;
		[0-9]*) ;;
		*)
			wireless_setup_failed "INVALID_CHANNEL"
		;;
	esac

	[[ "$hwmode_n" = "$hwmode" ]] || {
		enable_ht=1
		hwmode="$hwmode_n"

		json_get_vars htmode
		case "$htmode" in
			HT20|HT40+|HT40-);;
			*) htmode= ;;
		esac
	}

	case "$hwmode" in
		a|b|g|ad) ;;
		*)
			if [ "$channel" -gt 14 ]; then
				hwmode=a
			else
				hwmode=g
			fi
		;;
	esac
}

_wdev_handler() {
	json_load "$data"

	json_select config
	_wdev_prepare_channel
	json_select ..

	eval "drv_$1_$2 \"$interface\""
}

_wdev_msg_call() {
	local old_cb

	json_set_namespace wdev old_cb
	"$@"
	json_set_namespace $old_cb
}

_wdev_wrapper() {
	while [ -n "$1" ]; do
		eval "$1() { _wdev_msg_call _$1 \"\$@\"; }"
		shift
	done
}

_wdev_notify_init() {
	local command="$1"
	local interface="$2"

	json_init
	json_add_int "command" "$command"
	json_add_string "device" "$__netifd_device"
	[ -n "$interface" ] && json_add_string "interface" "$interface"
	json_add_object "data"
}

_wdev_notify() {
	local options="$1"

	json_close_object
	ubus $options call network.wireless notify "$(json_dump)"
}

_wdev_add_variables() {
	while [ -n "$1" ]; do
		local var="${1%%=*}"
		local val="$1"
		shift
		[[ "$var" = "$val" ]] && continue
		val="${val#*=}"
		json_add_string "$var" "$val"
	done
}

_wireless_add_vif() {
	local name="$1"; shift
	local ifname="$1"; shift

	_wdev_notify_init $CMD_SET_DATA "$name"
	json_add_string "ifname" "$ifname"
	_wdev_add_variables "$@"
	_wdev_notify
}

_wireless_set_up() {
	_wdev_notify_init $CMD_UP
	_wdev_notify
}

_wireless_set_data() {
	_wdev_notify_init $CMD_SET_DATA
	_wdev_add_variables "$@"
	_wdev_notify
}

_wireless_add_process() {
	_wdev_notify_init $CMD_PROCESS_ADD
	local exe="$2"
	[ -L "$exe" ] && exe="$(readlink -f "$exe")"
	json_add_int pid "$1"
	json_add_string exe "$exe"
	[ -n "$3" ] && json_add_boolean required 1
	exe2="$(readlink -f /proc/$pid/exe)"
	[ "$exe" = "$exe2" ] && echo "WARNING (wireless_add_process): executable path $exe does not match process $1 path ($exe2)"
	_wdev_notify
}

_wireless_process_kill_all() {
	_wdev_notify_init $CMD_PROCESS_KILL_ALL
	[ -n "$1" ] && json_add_int signal "$1"
	_wdev_notify
}

_wireless_set_retry() {
	_wdev_notify_init $CMD_SET_RETRY
	json_add_int retry "$1"
	_wdev_notify
}

_wdev_wrapper \
	wireless_add_vif \
	wireless_set_up \
	wireless_set_data \
	wireless_add_process \
	wireless_process_kill_all \
	wireless_set_retry \

wireless_vif_parse_encryption() {
	json_get_vars encryption
	set_default encryption none

	auth_mode_open=1
	auth_mode_shared=0
	auth_type=none
	wpa=0
	wpa_pairwise=
	eapol_key_index_workaround=0

	case "$encryption" in
		*tkip+aes|*tkip+ccmp|*aes+tkip|*ccmp+tkip) wpa_pairwise="CCMP TKIP";;
		*aes|*ccmp| psk2 | wpa2 |sae* | owe) wpa_pairwise="CCMP";;
		*tkip | wpa | psk) wpa_pairwise="TKIP";;
	esac


	# Examples:
	# psk-mixed/tkip    => WPA1+2 PSK, TKIP
	# wpa-psk2/tkip+aes => WPA2 PSK, CCMP+TKIP
	# wpa2/tkip+aes     => WPA2 RADIUS, CCMP+TKIP

	case "$encryption" in
		none)
			wpa=0
			wpa_pairwise=
		;;
		wpa2*|*psk2*|sae*|owe)
			wpa=2
		;;
		*mixed*)
			wpa=3
			wpa_pairwise="CCMP TKIP"
		;;
		wpa*|*psk*)
			wpa=1
		;;
		*)
			wpa=0
			wpa_pairwise=
		;;
	esac

	# Standlone TKIP is no longer allowed
	# TKIP alone is now prohibited by WFA so the only
	# combination left must be CCMP+TKIP (wpa=3)
	[ "$wpa_pairwise" = "TKIP" ] && {
		wpa=3
		wpa_pairwise="CCMP TKIP"
	}

	case "$encryption" in
		*psk*)
			auth_type=psk
		;;
		*wpa*)
			auth_type=eap
			eapol_key_index_workaround=1
		;;
		*8021x*)
			auth_type=eap
			eapol_version=2
			eap_server=0
		;;
		*wep*)
			auth_type=wep
			wpa=0
			wpa_pairwise=
			case "$encryption" in
				*shared*)
					auth_mode_open=0
					auth_mode_shared=1
				;;
				*mixed*)
					auth_mode_shared=1
				;;
			esac
		;;
		sae-mixed)
			auth_type=sae-mixed
		;;
		*sae*)
			auth_type=sae
		;;
		owe)
			auth_type=owe
		;;
	esac
}

_wireless_set_brsnoop_isolation() {
	local multicast_to_unicast="$1"
	local isolate

	json_get_var isolate isolate

	[ ${isolate:-0} -gt 0 -o -z "$network_bridge" ] && return
	[ ${multicast_to_unicast:-0} -gt 0 ] && json_add_boolean isolate 1
}

for_each_interface() {
	local _w_types="$1"; shift
	local _w_ifaces _w_iface
	local _w_type
	local _w_found

	local multicast_to_unicast

	json_get_keys _w_ifaces interfaces
	json_select interfaces
	for _w_iface in $_w_ifaces; do
		json_select "$_w_iface"
		if [ -n "$_w_types" ]; then
			json_get_var network_bridge bridge
			json_get_var multicast_to_unicast multicast_to_unicast
			json_select config
			_wireless_set_brsnoop_isolation "$multicast_to_unicast"
			json_get_var _w_type mode
			json_select ..
			_w_types=" $_w_types "
			[[ "${_w_types%$_w_type*}" = "$_w_types" ]] && {
				json_select ..
				continue
			}
		fi
		"$@" "$_w_iface"
		json_select ..
	done
	json_select ..
}

_wdev_common_device_config() {
	config_add_string channel hwmode htmode cfreq2
}

_wdev_common_iface_config() {
	config_add_string mode ssid encryption 'key:wpakey'
}

init_wireless_driver() {
	name="$1"; shift
	cmd="$1"; shift

	case "$cmd" in
		dump)
			add_driver() {
				eval "drv_$1_cleanup"

				json_init
				json_add_string name "$1"

				json_add_array device
				_wdev_common_device_config
				eval "drv_$1_init_device_config"
				json_close_array

				json_add_array iface
				_wdev_common_iface_config
				eval "drv_$1_init_iface_config"
				json_close_array

				json_dump
			}
		;;
		setup|teardown)
			interface="$1"; shift
			data="$1"; shift
			export __netifd_device="$interface"

			add_driver() {
				[[ "$name" == "$1" ]] || return 0
				_wdev_handler "$1" "$cmd"
			}
		;;
	esac
}
