-- Copyright 2008 Steven Barth <steven@midlink.org>
-- Licensed to the public under the Apache License 2.0.

local wa = require "luci.tools.webadmin"
local nw = require "luci.model.network"
local ut = require "luci.util"
local nt = require "luci.sys".net
local fs = require "nixio.fs"

local acct_port, acct_secret, acct_server, anonymous_identity, ant1, ant2,
	auth, auth_port, auth_secret, auth_server, bssid, cacert, cacert2,
	cc, ch, cipher, clientcert, clientcert2, ea, eaptype, en, encr,
	ft_protocol, ft_psk_generate_local, hidden, htmode, identity,
	ieee80211r, ieee80211w, ifname, isolate, key_retries,
	legacyrates, max_timeout, meshfwd, meshid, ml, mobility_domain, mode,
	mp, nasid, network, password, pmk_r1_push, privkey, privkey2, privkeypwd,
	privkeypwd2, r0_key_lifetime, r0kh, r1_key_holder, r1kh,
	reassociation_deadline, retry_timeout, ssid, st, tp, wepkey, wepslot,
	wmm, wpakey, wps, disassoc_low_ack, short_preamble, beacon_int, dtim_period

arg[1] = arg[1] or ""

m = Map("wireless", "",
	translate("The <em>Device Configuration</em> section covers physical settings of the radio " ..
		"hardware such as channel, transmit power or antenna selection which are shared among all " ..
		"defined wireless networks (if the radio hardware is multi-SSID capable). Per network settings " ..
		"like encryption or operation mode are grouped in the <em>Interface Configuration</em>."))

m:chain("network")
m:chain("firewall")
m.redirect = luci.dispatcher.build_url("admin/network/wireless")

nw.init(m.uci)

local wnet = nw:get_wifinet(arg[1])
local wdev = wnet and wnet:get_device()

-- redirect to overview page if network does not exist anymore (e.g. after a revert)
if not wnet or not wdev then
	luci.http.redirect(luci.dispatcher.build_url("admin/network/wireless"))
	return
end

local function txpower_list(iw)
	local list = iw.txpwrlist or { }
	local off  = tonumber(iw.txpower_offset) or 0
	local new  = { }
	local prev = -1
	local _, val
	for _, val in ipairs(list) do
		local dbm = val.dbm + off
		local mw  = math.floor(10 ^ (dbm / 10))
		if mw ~= prev then
			prev = mw
			new[#new+1] = {
				display_dbm = dbm,
				display_mw  = mw,
				driver_dbm  = val.dbm,
				driver_mw   = val.mw
			}
		end
	end
	return new
end

local function txpower_current(pwr, list)
	pwr = tonumber(pwr)
	if pwr ~= nil then
		local _, item
		for _, item in ipairs(list) do
			if item.driver_dbm >= pwr then
				return item.driver_dbm
			end
		end
	end
	return pwr or ""
end

local iw = luci.sys.wifi.getiwinfo(arg[1])
local hw_modes      = iw.hwmodelist or { }
local tx_power_list = txpower_list(iw)
local tx_power_cur  = txpower_current(wdev:get("txpower"), tx_power_list)

-- wireless toggle was requested, commit and reload page
function m.parse(map)
	local new_cc = m:formvalue("cbid.wireless.%s.country" % wdev:name())
	local old_cc = m:get(wdev:name(), "country")

	if m:formvalue("cbid.wireless.%s.__toggle" % wdev:name()) then
		if wdev:get("disabled") == "1" or wnet:get("disabled") == "1" then
			wnet:set("disabled", nil)
		else
			wnet:set("disabled", "1")
		end
		wdev:set("disabled", nil)
		m.apply_needed = true
		m.redirect = nil
	end

	Map.parse(map)

	if m:get(wdev:name(), "type") == "mac80211" and new_cc and new_cc ~= old_cc then
		luci.sys.call("iw reg set %s" % ut.shellquote(new_cc))

		local old_ch = tonumber(m:formvalue("cbid.wireless.%s._mode_freq.channel" % wdev:name()) or "")
		if old_ch then
			local _, c, new_ch
			for _, c in ipairs(iw.freqlist) do
				if c.channel > old_ch or (old_ch <= 14 and c.channel > 14) then
					break
				end
				new_ch = c.channel
			end
			if new_ch ~= old_ch then
				wdev:set("channel", new_ch)
				m.message = translatef("Channel %d is not available in the %s regulatory domain and has been auto-adjusted to %d.",
					old_ch, new_cc, new_ch)
			end
		end
	end

	if wdev:get("disabled") == "1" or wnet:get("disabled") == "1" then
		en.title      = translate("Wireless network is disabled")
		en.inputtitle = translate("Enable")
		en.inputstyle = "apply"
	else
		en.title      = translate("Wireless network is enabled")
		en.inputtitle = translate("Disable")
		en.inputstyle = "reset"
	end
end

m.title = luci.util.pcdata(wnet:get_i18n())

s = m:section(NamedSection, wdev:name(), "wifi-device", translate("Device Configuration"))
s.addremove = false

s:tab("general", translate("General Setup"))
s:tab("macfilter", translate("MAC-Filter"))
s:tab("advanced", translate("Advanced Settings"))

st = s:taboption("general", DummyValue, "__status", translate("Status"))
st.template = "admin_network/wifi_status"
st.ifname   = arg[1]

en = s:taboption("general", Button, "__toggle")

local hwtype = wdev:get("type")

-- NanoFoo
local nsantenna = wdev:get("antenna")

-- Check whether there are client interfaces on the same radio,
-- if yes, lock the channel choice as these stations will dicatate the freq
local found_sta = nil
local _, net
if wnet:mode() ~= "sta" then
	for _, net in ipairs(wdev:get_wifinets()) do
		if net:mode() == "sta" and net:get("disabled") ~= "1" then
			if not found_sta then
				found_sta = {}
				found_sta.channel = net:channel()
				found_sta.names = {}
			end
			found_sta.names[#found_sta.names+1] = net:shortname()
		end
	end
end

if found_sta then
	ch = s:taboption("general", DummyValue, "choice", translate("Channel"))
	ch.value = translatef("Locked to channel %s used by: %s",
		found_sta.channel or "(auto)", table.concat(found_sta.names, ", "))
else
	ch = s:taboption("general", Value, "_mode_freq", '<br />'..translate("Operating frequency"))
	ch.iwinfo = iw
	ch.template = "cbi/wireless_modefreq"

	function ch.cfgvalue(self, section)
		return {
			m:get(section, "hwmode") or "",
			m:get(section, "channel") or "auto",
			m:get(section, "htmode") or ""
		}
	end

	function ch.formvalue(self, section)
		return {
			m:formvalue(self:cbid(section) .. ".band") or (hw_modes.g and "11g" or "11a"),
			m:formvalue(self:cbid(section) .. ".channel") or "auto",
			m:formvalue(self:cbid(section) .. ".htmode") or ""
		}
	end

	function ch.write(self, section, value)
		m:set(section, "hwmode", value[1])
		m:set(section, "channel", value[2])
		m:set(section, "htmode", value[3])
	end
end

------------------- MAC80211 Device ------------------

if hwtype == "mac80211" then
	if #tx_power_list > 0 then
		tp = s:taboption("general", ListValue,
			"txpower", translate("Transmit Power"), "dBm")
		tp.rmempty = true
		tp.default = tx_power_cur
		function tp.cfgvalue(...)
			return txpower_current(Value.cfgvalue(...), tx_power_list)
		end

		tp:value("", translate("auto"))
		for _, p in ipairs(tx_power_list) do
			tp:value(p.driver_dbm, "%i dBm (%i mW)"
				%{ p.display_dbm, p.display_mw })
		end
	end

	local cl = iw and iw.countrylist
	if cl and #cl > 0 then
		cc = s:taboption("advanced", ListValue, "country", translate("Country Code"), translate("Use ISO/IEC 3166 alpha2 country codes."))
		cc.default = tostring(iw and iw.country or "00")
		for _, c in ipairs(cl) do
			cc:value(c.alpha2, "%s - %s" %{ c.alpha2, c.name })
		end
	else
		s:taboption("advanced", Value, "country", translate("Country Code"), translate("Use ISO/IEC 3166 alpha2 country codes."))
	end

	legacyrates = s:taboption("advanced", Flag, "legacy_rates", translate("Allow legacy 802.11b rates"))
	legacyrates.rmempty = false
	legacyrates.default = "1"

	s:taboption("advanced", Value, "distance", translate("Distance Optimization"),
		translate("Distance to farthest network member in meters."))

	-- external antenna profiles
	local eal = iw and iw.extant
	if eal and #eal > 0 then
		ea = s:taboption("advanced", ListValue, "extant", translate("Antenna Configuration"))
		for _, eap in ipairs(eal) do
			ea:value(eap.id, "%s (%s)" %{ eap.name, eap.description })
			if eap.selected then
				ea.default = eap.id
			end
		end
	end

	s:taboption("advanced", Value, "frag", translate("Fragmentation Threshold"))
	s:taboption("advanced", Value, "rts", translate("RTS/CTS Threshold"))
	
	s:taboption("advanced", Flag, "noscan", translate("Force 40MHz mode"),
		translate("Always use 40MHz channels even if the secondary channel overlaps. Using this option does not comply with IEEE 802.11n-2009!")).optional = true

	beacon_int = s:taboption("advanced", Value, "beacon_int", translate("Beacon Interval"))
	beacon_int.optional = true
	beacon_int.placeholder = 100
	beacon_int.datatype = "range(15,65535)"
end


------------------- Broadcom Device ------------------

if hwtype == "broadcom" then
	tp = s:taboption("general",
		(#tx_power_list > 0) and ListValue or Value,
		"txpower", translate("Transmit Power"), "dBm")

	tp.rmempty = true
	tp.default = tx_power_cur

	function tp.cfgvalue(...)
		return txpower_current(Value.cfgvalue(...), tx_power_list)
	end

	tp:value("", translate("auto"))
	for _, p in ipairs(tx_power_list) do
		tp:value(p.driver_dbm, "%i dBm (%i mW)"
			%{ p.display_dbm, p.display_mw })
	end

	mode = s:taboption("advanced", ListValue, "hwmode", translate("Band"))
	if hw_modes.b then
		mode:value("11b", "2.4GHz (802.11b)")
		if hw_modes.g then
			mode:value("11bg", "2.4GHz (802.11b+g)")
		end
	end
	if hw_modes.g then
		mode:value("11g", "2.4GHz (802.11g)")
		mode:value("11gst", "2.4GHz (802.11g + Turbo)")
		mode:value("11lrs", "2.4GHz (802.11g Limited Rate Support)")
	end
	if hw_modes.a then mode:value("11a", "5GHz (802.11a)") end
	if hw_modes.n then
		if hw_modes.g then
			mode:value("11ng", "2.4GHz (802.11g+n)")
			mode:value("11n", "2.4GHz (802.11n)")
		end
		if hw_modes.a then
			mode:value("11na", "5GHz (802.11a+n)")
			mode:value("11n", "5GHz (802.11n)")
		end
		htmode = s:taboption("advanced", ListValue, "htmode", translate("HT mode (802.11n)"))
		htmode:depends("hwmode", "11ng")
		htmode:depends("hwmode", "11na")
		htmode:depends("hwmode", "11n")
		htmode:value("HT20", "20MHz")
		htmode:value("HT40", "40MHz")
	end

	ant1 = s:taboption("advanced", ListValue, "txantenna", translate("Transmitter Antenna"))
	ant1.widget = "radio"
	ant1:depends("diversity", "")
	ant1:value("3", translate("auto"))
	ant1:value("0", translate("Antenna 1"))
	ant1:value("1", translate("Antenna 2"))

	ant2 = s:taboption("advanced", ListValue, "rxantenna", translate("Receiver Antenna"))
	ant2.widget = "radio"
	ant2:depends("diversity", "")
	ant2:value("3", translate("auto"))
	ant2:value("0", translate("Antenna 1"))
	ant2:value("1", translate("Antenna 2"))

	s:taboption("advanced", Flag, "frameburst", translate("Frame Bursting"))

	s:taboption("advanced", Value, "distance", translate("Distance Optimization"))
	--s:option(Value, "slottime", translate("Slot time"))

	s:taboption("advanced", Value, "country", translate("Country Code"))
	s:taboption("advanced", Value, "maxassoc", translate("Connection Limit"))
end


--------------------- HostAP Device ---------------------

if hwtype == "prism2" then
	s:taboption("advanced", Value, "txpower", translate("Transmit Power"), "att units").rmempty = true

	s:taboption("advanced", Flag, "diversity", translate("Diversity")).rmempty = false

	s:taboption("advanced", Value, "txantenna", translate("Transmitter Antenna"))
	s:taboption("advanced", Value, "rxantenna", translate("Receiver Antenna"))
end


----------------------- Interface -----------------------

s = m:section(NamedSection, wnet.sid, "wifi-iface", translate("Interface Configuration"))
s.addremove = false
s.anonymous = true
s.defaults.device = wdev:name()

s:tab("general", translate("General Setup"))
s:tab("encryption", translate("Wireless Security"))
s:tab("macfilter", translate("MAC-Filter"))
s:tab("advanced", translate("Advanced Settings"))

mode = s:taboption("general", ListValue, "mode", translate("Mode"))
mode.override_values = true
mode:value("ap", translate("Access Point"))
mode:value("sta", translate("Client"))
mode:value("adhoc", translate("Ad-Hoc"))

meshid = s:taboption("general", Value, "mesh_id", translate("Mesh Id"))
meshid:depends({mode="mesh"})

meshfwd = s:taboption("advanced", Flag, "mesh_fwding", translate("Forward mesh peer traffic"))
meshfwd.rmempty = false
meshfwd.default = "1"
meshfwd:depends({mode="mesh"})

ssid = s:taboption("general", Value, "ssid", translate("<abbr title=\"Extended Service Set Identifier\">ESSID</abbr>"))
ssid.datatype = "maxlength(32)"
ssid:depends({mode="ap"})
ssid:depends({mode="sta"})
ssid:depends({mode="adhoc"})
ssid:depends({mode="ahdemo"})
ssid:depends({mode="monitor"})
ssid:depends({mode="ap-wds"})
ssid:depends({mode="sta-wds"})
ssid:depends({mode="wds"})

bssid = s:taboption("general", Value, "bssid", translate("<abbr title=\"Basic Service Set Identifier\">BSSID</abbr>"))

network = s:taboption("general", Value, "network", translate("Network"),
	translate("Choose the network(s) you want to attach to this wireless interface or " ..
		"fill out the <em>create</em> field to define a new network."))

network.rmempty = true
network.template = "cbi/network_netlist"
network.widget = "checkbox"
network.novirtual = true

function network.write(self, section, value)
	local i = nw:get_interface(section)
	if i then
		local _, net, old, new = nil, nil, {}, {}

		for _, net in ipairs(i:get_networks()) do
			old[net:name()] = true
		end

		for net in ut.imatch(value) do
			new[net] = true
			if not old[net] then
				local n = nw:get_network(net) or nw:add_network(net, { proto = "none" })
				if n then
					if not n:is_empty() then
						n:set("type", "bridge")
					end
					n:add_interface(i)
				end
			end
		end

		for net, _ in pairs(old) do
			if not new[net] then
				local n = nw:get_network(net)
				if n then
					n:del_interface(i)
				end
			end
		end
	end
end

-------------------- MAC80211 Interface ----------------------

if hwtype == "mac80211" then
	if fs.access("/usr/sbin/iw") then
		mode:value("mesh", "802.11s")
	end

	mode:value("ahdemo", translate("Pseudo Ad-Hoc (ahdemo)"))
	mode:value("monitor", translate("Monitor"))
	bssid:depends({mode="adhoc"})
	bssid:depends({mode="sta"})
	bssid:depends({mode="sta-wds"})

	mp = s:taboption("macfilter", ListValue, "macfilter", translate("MAC-Address Filter"))
	mp:depends({mode="ap"})
	mp:depends({mode="ap-wds"})
	mp:value("", translate("disable"))
	mp:value("allow", translate("Allow listed only"))
	mp:value("deny", translate("Allow all except listed"))

	ml = s:taboption("macfilter", DynamicList, "maclist", translate("MAC-List"))
	ml.datatype = "macaddr"
	ml:depends({macfilter="allow"})
	ml:depends({macfilter="deny"})
	nt.mac_hints(function(mac, name) ml:value(mac, "%s (%s)" %{ mac, name }) end)

	mode:value("ap-wds", "%s (%s)" % {translate("Access Point"), translate("WDS")})
	mode:value("sta-wds", "%s (%s)" % {translate("Client"), translate("WDS")})

	function mode.write(self, section, value)
		if value == "ap-wds" then
			ListValue.write(self, section, "ap")
			m.uci:set("wireless", section, "wds", 1)
		elseif value == "sta-wds" then
			ListValue.write(self, section, "sta")
			m.uci:set("wireless", section, "wds", 1)
		else
			ListValue.write(self, section, value)
			m.uci:delete("wireless", section, "wds")
		end
	end

	function mode.cfgvalue(self, section)
		local mode = ListValue.cfgvalue(self, section)
		local wds  = m.uci:get("wireless", section, "wds") == "1"

		if mode == "ap" and wds then
			return "ap-wds"
		elseif mode == "sta" and wds then
			return "sta-wds"
		else
			return mode
		end
	end

	hidden = s:taboption("general", Flag, "hidden", translate("Hide <abbr title=\"Extended Service Set Identifier\">ESSID</abbr>"))
	hidden:depends({mode="ap"})
	hidden:depends({mode="ap-wds"})

	wmm = s:taboption("general", Flag, "wmm", translate("WMM Mode"))
	wmm:depends({mode="ap"})
	wmm:depends({mode="ap-wds"})
	wmm.default = wmm.enabled

	isolate = s:taboption("advanced", Flag, "isolate", translate("Isolate Clients"),
	 translate("Prevents client-to-client communication"))
	isolate:depends({mode="ap"})
	isolate:depends({mode="ap-wds"})

	ifname = s:taboption("advanced", Value, "ifname", translate("Interface name"), translate("Override default interface name"))
	ifname.optional = true

	short_preamble = s:taboption("advanced", Flag, "short_preamble", translate("Short Preamble"))
	short_preamble.default = short_preamble.enabled

	dtim_period = s:taboption("advanced", Value, "dtim_period", translate("DTIM Interval"), translate("Delivery Traffic Indication Message Interval"))
	dtim_period.optional = true
	dtim_period.placeholder = 2
	dtim_period.datatype = "range(1,255)"

	disassoc_low_ack = s:taboption("advanced", Flag, "disassoc_low_ack", translate("Disassociate On Low Acknowledgement"),
		translate("Allow AP mode to disconnect STAs based on low ACK condition"))
	disassoc_low_ack.default = disassoc_low_ack.enabled
end


-------------------- Broadcom Interface ----------------------

if hwtype == "broadcom" then
	mode:value("wds", translate("WDS"))
	mode:value("monitor", translate("Monitor"))

	hidden = s:taboption("general", Flag, "hidden", translate("Hide <abbr title=\"Extended Service Set Identifier\">ESSID</abbr>"))
	hidden:depends({mode="ap"})
	hidden:depends({mode="adhoc"})
	hidden:depends({mode="wds"})

	isolate = s:taboption("advanced", Flag, "isolate", translate("Separate Clients"),
	 translate("Prevents client-to-client communication"))
	isolate:depends({mode="ap"})

	s:taboption("advanced", Flag, "doth", "802.11h")
	s:taboption("advanced", Flag, "wmm", translate("WMM Mode"))

	bssid:depends({mode="wds"})
	bssid:depends({mode="adhoc"})
end


----------------------- HostAP Interface ---------------------

if hwtype == "prism2" then
	mode:value("wds", translate("WDS"))
	mode:value("monitor", translate("Monitor"))

	hidden = s:taboption("general", Flag, "hidden", translate("Hide <abbr title=\"Extended Service Set Identifier\">ESSID</abbr>"))
	hidden:depends({mode="ap"})
	hidden:depends({mode="adhoc"})
	hidden:depends({mode="wds"})

	bssid:depends({mode="sta"})

	mp = s:taboption("macfilter", ListValue, "macpolicy", translate("MAC-Address Filter"))
	mp:value("", translate("disable"))
	mp:value("allow", translate("Allow listed only"))
	mp:value("deny", translate("Allow all except listed"))
	ml = s:taboption("macfilter", DynamicList, "maclist", translate("MAC-List"))
	ml:depends({macpolicy="allow"})
	ml:depends({macpolicy="deny"})
	nt.mac_hints(function(mac, name) ml:value(mac, "%s (%s)" %{ mac, name }) end)

	s:taboption("advanced", Value, "rate", translate("Transmission Rate"))
	s:taboption("advanced", Value, "frag", translate("Fragmentation Threshold"))
	s:taboption("advanced", Value, "rts", translate("RTS/CTS Threshold"))
end


------------------- WiFI-Encryption -------------------

encr = s:taboption("encryption", ListValue, "encryption", translate("Encryption"))
encr.override_values = true
encr.override_depends = true
encr:depends({mode="ap"})
encr:depends({mode="sta"})
encr:depends({mode="adhoc"})
encr:depends({mode="ahdemo"})
encr:depends({mode="ap-wds"})
encr:depends({mode="sta-wds"})
encr:depends({mode="mesh"})

cipher = s:taboption("encryption", ListValue, "cipher", translate("Cipher"))
cipher:depends({encryption="wpa"})
cipher:depends({encryption="wpa2"})
cipher:depends({encryption="psk"})
cipher:depends({encryption="psk2"})
cipher:depends({encryption="wpa-mixed"})
cipher:depends({encryption="psk-mixed"})
cipher:value("auto", translate("auto"))
cipher:value("ccmp", translate("Force CCMP (AES)"))
cipher:value("tkip", translate("Force TKIP"))
cipher:value("tkip+ccmp", translate("Force TKIP and CCMP (AES)"))

function encr.cfgvalue(self, section)
	local v = tostring(ListValue.cfgvalue(self, section))
	if v == "wep" then
		return "wep-open"
	elseif v and v:match("%+") then
		return (v:gsub("%+.+$", ""))
	end
	return v
end

function encr.write(self, section, value)
	local e = tostring(encr:formvalue(section))
	local c = tostring(cipher:formvalue(section))
	if value == "wpa" or value == "wpa2"  then
		self.map.uci:delete("wireless", section, "key")
	end
	if e and (c == "tkip" or c == "ccmp" or c == "tkip+ccmp") then
		e = e .. "+" .. c
	end
	self.map:set(section, "encryption", e)
end

function cipher.cfgvalue(self, section)
	local v = tostring(ListValue.cfgvalue(encr, section))
	if v and v:match("%+") then
		v = v:gsub("^[^%+]+%+", "")
		if v == "aes" then v = "ccmp"
		elseif v == "tkip+aes" then v = "tkip+ccmp"
		elseif v == "aes+tkip" then v = "tkip+ccmp"
		elseif v == "ccmp+tkip" then v = "tkip+ccmp"
		end
	end
	return v
end

function cipher.write(self, section)
	return encr:write(section)
end


encr:value("none", "No Encryption")
encr:value("wep-open",   translate("WEP Open System"), {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"}, {mode="adhoc"}, {mode="ahdemo"}, {mode="wds"})
encr:value("wep-shared", translate("WEP Shared Key"),  {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"}, {mode="adhoc"}, {mode="ahdemo"}, {mode="wds"})

if hwtype == "mac80211" or hwtype == "prism2" then
	local supplicant = fs.access("/usr/sbin/wpa_supplicant")
	local hostapd = fs.access("/usr/sbin/hostapd")

	-- Probe EAP support
	local has_ap_eap  = (os.execute("hostapd -veap >/dev/null 2>/dev/null") == 0)
	local has_sta_eap = (os.execute("wpa_supplicant -veap >/dev/null 2>/dev/null") == 0)

	if hostapd and supplicant then
		encr:value("psk", "WPA-PSK", {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"}, {mode="adhoc"})
		encr:value("psk2", "WPA2-PSK", {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"}, {mode="adhoc"})
		encr:value("psk-mixed", "WPA-PSK/WPA2-PSK Mixed Mode", {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"}, {mode="adhoc"})
		if has_ap_eap and has_sta_eap then
			encr:value("wpa", "WPA-EAP", {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"})
			encr:value("wpa2", "WPA2-EAP", {mode="ap"}, {mode="sta"}, {mode="ap-wds"}, {mode="sta-wds"})
		end
	elseif hostapd and not supplicant then
		encr:value("psk", "WPA-PSK", {mode="ap"}, {mode="ap-wds"})
		encr:value("psk2", "WPA2-PSK", {mode="ap"}, {mode="ap-wds"})
		encr:value("psk-mixed", "WPA-PSK/WPA2-PSK Mixed Mode", {mode="ap"}, {mode="ap-wds"})
		if has_ap_eap then
			encr:value("wpa", "WPA-EAP", {mode="ap"}, {mode="ap-wds"})
			encr:value("wpa2", "WPA2-EAP", {mode="ap"}, {mode="ap-wds"})
		end
		encr.description = translate(
			"WPA-Encryption requires wpa_supplicant (for client mode) or hostapd (for AP " ..
			"and ad-hoc mode) to be installed."
		)
	elseif not hostapd and supplicant then
		encr:value("psk", "WPA-PSK", {mode="sta"}, {mode="sta-wds"}, {mode="adhoc"})
		encr:value("psk2", "WPA2-PSK", {mode="sta"}, {mode="sta-wds"}, {mode="adhoc"})
		encr:value("psk-mixed", "WPA-PSK/WPA2-PSK Mixed Mode", {mode="sta"}, {mode="sta-wds"}, {mode="adhoc"})
		if has_sta_eap then
			encr:value("wpa", "WPA-EAP", {mode="sta"}, {mode="sta-wds"})
			encr:value("wpa2", "WPA2-EAP", {mode="sta"}, {mode="sta-wds"})
		end
		encr.description = translate(
			"WPA-Encryption requires wpa_supplicant (for client mode) or hostapd (for AP " ..
			"and ad-hoc mode) to be installed."
		)
	else
		encr.description = translate(
			"WPA-Encryption requires wpa_supplicant (for client mode) or hostapd (for AP " ..
			"and ad-hoc mode) to be installed."
		)
	end
elseif hwtype == "broadcom" then
	encr:value("psk", "WPA-PSK")
	encr:value("psk2", "WPA2-PSK")
	encr:value("psk+psk2", "WPA-PSK/WPA2-PSK Mixed Mode")
end

auth_server = s:taboption("encryption", Value, "auth_server", translate("Radius-Authentication-Server"))
auth_server:depends({mode="ap", encryption="wpa"})
auth_server:depends({mode="ap", encryption="wpa2"})
auth_server:depends({mode="ap-wds", encryption="wpa"})
auth_server:depends({mode="ap-wds", encryption="wpa2"})
auth_server.rmempty = true
auth_server.datatype = "host(0)"

auth_port = s:taboption("encryption", Value, "auth_port", translate("Radius-Authentication-Port"), translatef("Default %d", 1812))
auth_port:depends({mode="ap", encryption="wpa"})
auth_port:depends({mode="ap", encryption="wpa2"})
auth_port:depends({mode="ap-wds", encryption="wpa"})
auth_port:depends({mode="ap-wds", encryption="wpa2"})
auth_port.rmempty = true
auth_port.datatype = "port"

auth_secret = s:taboption("encryption", Value, "auth_secret", translate("Radius-Authentication-Secret"))
auth_secret:depends({mode="ap", encryption="wpa"})
auth_secret:depends({mode="ap", encryption="wpa2"})
auth_secret:depends({mode="ap-wds", encryption="wpa"})
auth_secret:depends({mode="ap-wds", encryption="wpa2"})
auth_secret.rmempty = true
auth_secret.password = true

acct_server = s:taboption("encryption", Value, "acct_server", translate("Radius-Accounting-Server"))
acct_server:depends({mode="ap", encryption="wpa"})
acct_server:depends({mode="ap", encryption="wpa2"})
acct_server:depends({mode="ap-wds", encryption="wpa"})
acct_server:depends({mode="ap-wds", encryption="wpa2"})
acct_server.rmempty = true
acct_server.datatype = "host(0)"

acct_port = s:taboption("encryption", Value, "acct_port", translate("Radius-Accounting-Port"), translatef("Default %d", 1813))
acct_port:depends({mode="ap", encryption="wpa"})
acct_port:depends({mode="ap", encryption="wpa2"})
acct_port:depends({mode="ap-wds", encryption="wpa"})
acct_port:depends({mode="ap-wds", encryption="wpa2"})
acct_port.rmempty = true
acct_port.datatype = "port"

acct_secret = s:taboption("encryption", Value, "acct_secret", translate("Radius-Accounting-Secret"))
acct_secret:depends({mode="ap", encryption="wpa"})
acct_secret:depends({mode="ap", encryption="wpa2"})
acct_secret:depends({mode="ap-wds", encryption="wpa"})
acct_secret:depends({mode="ap-wds", encryption="wpa2"})
acct_secret.rmempty = true
acct_secret.password = true

wpakey = s:taboption("encryption", Value, "_wpa_key", translate("Key"))
wpakey:depends("encryption", "psk")
wpakey:depends("encryption", "psk2")
wpakey:depends("encryption", "psk+psk2")
wpakey:depends("encryption", "psk-mixed")
wpakey.datatype = "wpakey"
wpakey.rmempty = true
wpakey.password = true

wpakey.cfgvalue = function(self, section, value)
	local key = m.uci:get("wireless", section, "key")
	if key == "1" or key == "2" or key == "3" or key == "4" then
		return nil
	end
	return key
end

wpakey.write = function(self, section, value)
	self.map.uci:set("wireless", section, "key", value)
	self.map.uci:delete("wireless", section, "key1")
end


wepslot = s:taboption("encryption", ListValue, "_wep_key", translate("Used Key Slot"))
wepslot:depends("encryption", "wep-open")
wepslot:depends("encryption", "wep-shared")
wepslot:value("1", translatef("Key #%d", 1))
wepslot:value("2", translatef("Key #%d", 2))
wepslot:value("3", translatef("Key #%d", 3))
wepslot:value("4", translatef("Key #%d", 4))

wepslot.cfgvalue = function(self, section)
	local slot = tonumber(m.uci:get("wireless", section, "key"))
	if not slot or slot < 1 or slot > 4 then
		return 1
	end
	return slot
end

wepslot.write = function(self, section, value)
	self.map.uci:set("wireless", section, "key", value)
end

local slot
for slot=1,4 do
	wepkey = s:taboption("encryption", Value, "key" .. slot, translatef("Key #%d", slot))
	wepkey:depends("encryption", "wep-open")
	wepkey:depends("encryption", "wep-shared")
	wepkey.datatype = "wepkey"
	wepkey.rmempty = true
	wepkey.password = true

	function wepkey.write(self, section, value)
		if value and (#value == 5 or #value == 13) then
			value = "s:" .. value
		end
		return Value.write(self, section, value)
	end
end


if hwtype == "mac80211" or hwtype == "prism2" then

	-- Probe 802.11r support (and EAP support as a proxy for Openwrt)
	local has_80211r = (os.execute("hostapd -v11r 2>/dev/null || hostapd -veap 2>/dev/null") == 0)

	ieee80211r = s:taboption("encryption", Flag, "ieee80211r",
		translate("802.11r Fast Transition"),
		translate("Enables fast roaming among access points that belong " ..
			"to the same Mobility Domain"))
	ieee80211r:depends({mode="ap", encryption="wpa"})
	ieee80211r:depends({mode="ap", encryption="wpa2"})
	ieee80211r:depends({mode="ap-wds", encryption="wpa"})
	ieee80211r:depends({mode="ap-wds", encryption="wpa2"})
	if has_80211r then
		ieee80211r:depends({mode="ap", encryption="psk"})
		ieee80211r:depends({mode="ap", encryption="psk2"})
		ieee80211r:depends({mode="ap", encryption="psk-mixed"})
		ieee80211r:depends({mode="ap-wds", encryption="psk"})
		ieee80211r:depends({mode="ap-wds", encryption="psk2"})
		ieee80211r:depends({mode="ap-wds", encryption="psk-mixed"})
	end
	ieee80211r.rmempty = true

	nasid = s:taboption("encryption", Value, "nasid", translate("NAS ID"),
		translate("Used for two different purposes: RADIUS NAS ID and " ..
			"802.11r R0KH-ID. Not needed with normal WPA(2)-PSK."))
	nasid:depends({mode="ap", encryption="wpa"})
	nasid:depends({mode="ap", encryption="wpa2"})
	nasid:depends({mode="ap-wds", encryption="wpa"})
	nasid:depends({mode="ap-wds", encryption="wpa2"})
	nasid:depends({ieee80211r="1"})
	nasid.rmempty = true

	mobility_domain = s:taboption("encryption", Value, "mobility_domain",
			translate("Mobility Domain"),
			translate("4-character hexadecimal ID"))
	mobility_domain:depends({ieee80211r="1"})
	mobility_domain.placeholder = "4f57"
	mobility_domain.datatype = "and(hexstring,rangelength(4,4))"
	mobility_domain.rmempty = true

	reassociation_deadline = s:taboption("encryption", Value, "reassociation_deadline",
		translate("Reassociation Deadline"),
		translate("time units (TUs / 1.024 ms) [1000-65535]"))
	reassociation_deadline:depends({ieee80211r="1"})
	reassociation_deadline.placeholder = "1000"
	reassociation_deadline.datatype = "range(1000,65535)"
	reassociation_deadline.rmempty = true

	ft_protocol = s:taboption("encryption", ListValue, "ft_over_ds", translate("FT protocol"))
	ft_protocol:depends({ieee80211r="1"})
	ft_protocol:value("1", translatef("FT over DS"))
	ft_protocol:value("0", translatef("FT over the Air"))
	ft_protocol.rmempty = true

	ft_psk_generate_local = s:taboption("encryption", Flag, "ft_psk_generate_local",
		translate("Generate PMK locally"),
		translate("When using a PSK, the PMK can be generated locally without inter AP communications"))
	ft_psk_generate_local:depends({ieee80211r="1"})

	r0_key_lifetime = s:taboption("encryption", Value, "r0_key_lifetime",
			translate("R0 Key Lifetime"), translate("minutes"))
	r0_key_lifetime:depends({ieee80211r="1", ft_psk_generate_local=""})
	r0_key_lifetime.placeholder = "10000"
	r0_key_lifetime.datatype = "uinteger"
	r0_key_lifetime.rmempty = true

	r1_key_holder = s:taboption("encryption", Value, "r1_key_holder",
			translate("R1 Key Holder"),
			translate("6-octet identifier as a hex string - no colons"))
	r1_key_holder:depends({ieee80211r="1", ft_psk_generate_local=""})
	r1_key_holder.placeholder = "00004f577274"
	r1_key_holder.datatype = "and(hexstring,rangelength(12,12))"
	r1_key_holder.rmempty = true

	pmk_r1_push = s:taboption("encryption", Flag, "pmk_r1_push", translate("PMK R1 Push"))
	pmk_r1_push:depends({ieee80211r="1", ft_psk_generate_local=""})
	pmk_r1_push.placeholder = "0"
	pmk_r1_push.rmempty = true

	r0kh = s:taboption("encryption", DynamicList, "r0kh", translate("External R0 Key Holder List"),
		translate("List of R0KHs in the same Mobility Domain. " ..
			"<br />Format: MAC-address,NAS-Identifier,128-bit key as hex string. " ..
			"<br />This list is used to map R0KH-ID (NAS Identifier) to a destination " ..
			"MAC address when requesting PMK-R1 key from the R0KH that the STA " ..
			"used during the Initial Mobility Domain Association."))
	r0kh:depends({ieee80211r="1", ft_psk_generate_local=""})
	r0kh.rmempty = true

	r1kh = s:taboption("encryption", DynamicList, "r1kh", translate("External R1 Key Holder List"),
		translate ("List of R1KHs in the same Mobility Domain. "..
			"<br />Format: MAC-address,R1KH-ID as 6 octets with colons,128-bit key as hex string. "..
			"<br />This list is used to map R1KH-ID to a destination MAC address " ..
			"when sending PMK-R1 key from the R0KH. This is also the " ..
			"list of authorized R1KHs in the MD that can request PMK-R1 keys."))
	r1kh:depends({ieee80211r="1", ft_psk_generate_local=""})
	r1kh.rmempty = true
	-- End of 802.11r options

	eaptype = s:taboption("encryption", ListValue, "eap_type", translate("EAP-Method"))
	eaptype:value("tls",  "TLS")
	eaptype:value("ttls", "TTLS")
	eaptype:value("peap", "PEAP")
	eaptype:value("fast", "FAST")
	eaptype:depends({mode="sta", encryption="wpa"})
	eaptype:depends({mode="sta", encryption="wpa2"})
	eaptype:depends({mode="sta-wds", encryption="wpa"})
	eaptype:depends({mode="sta-wds", encryption="wpa2"})

	cacert = s:taboption("encryption", FileUpload, "ca_cert", translate("Path to CA-Certificate"))
	cacert:depends({mode="sta", encryption="wpa"})
	cacert:depends({mode="sta", encryption="wpa2"})
	cacert:depends({mode="sta-wds", encryption="wpa"})
	cacert:depends({mode="sta-wds", encryption="wpa2"})
	cacert.rmempty = true

	clientcert = s:taboption("encryption", FileUpload, "client_cert", translate("Path to Client-Certificate"))
	clientcert:depends({mode="sta", eap_type="tls", encryption="wpa"})
	clientcert:depends({mode="sta", eap_type="tls", encryption="wpa2"})
	clientcert:depends({mode="sta-wds", eap_type="tls", encryption="wpa"})
	clientcert:depends({mode="sta-wds", eap_type="tls", encryption="wpa2"})

	privkey = s:taboption("encryption", FileUpload, "priv_key", translate("Path to Private Key"))
	privkey:depends({mode="sta", eap_type="tls", encryption="wpa2"})
	privkey:depends({mode="sta", eap_type="tls", encryption="wpa"})
	privkey:depends({mode="sta-wds", eap_type="tls", encryption="wpa2"})
	privkey:depends({mode="sta-wds", eap_type="tls", encryption="wpa"})

	privkeypwd = s:taboption("encryption", Value, "priv_key_pwd", translate("Password of Private Key"))
	privkeypwd:depends({mode="sta", eap_type="tls", encryption="wpa2"})
	privkeypwd:depends({mode="sta", eap_type="tls", encryption="wpa"})
	privkeypwd:depends({mode="sta-wds", eap_type="tls", encryption="wpa2"})
	privkeypwd:depends({mode="sta-wds", eap_type="tls", encryption="wpa"})
	privkeypwd.rmempty = true
	privkeypwd.password = true

	auth = s:taboption("encryption", ListValue, "auth", translate("Authentication"))
	auth:value("PAP", "PAP", {eap_type="ttls"})
	auth:value("CHAP", "CHAP", {eap_type="ttls"})
	auth:value("MSCHAP", "MSCHAP", {eap_type="ttls"})
	auth:value("MSCHAPV2", "MSCHAPv2", {eap_type="ttls"})
	auth:value("EAP-GTC")
	auth:value("EAP-MD5")
	auth:value("EAP-MSCHAPV2")
	auth:value("EAP-TLS")
	auth:depends({mode="sta", eap_type="fast", encryption="wpa2"})
	auth:depends({mode="sta", eap_type="fast", encryption="wpa"})
	auth:depends({mode="sta", eap_type="peap", encryption="wpa2"})
	auth:depends({mode="sta", eap_type="peap", encryption="wpa"})
	auth:depends({mode="sta", eap_type="ttls", encryption="wpa2"})
	auth:depends({mode="sta", eap_type="ttls", encryption="wpa"})
	auth:depends({mode="sta-wds", eap_type="fast", encryption="wpa2"})
	auth:depends({mode="sta-wds", eap_type="fast", encryption="wpa"})
	auth:depends({mode="sta-wds", eap_type="peap", encryption="wpa2"})
	auth:depends({mode="sta-wds", eap_type="peap", encryption="wpa"})
	auth:depends({mode="sta-wds", eap_type="ttls", encryption="wpa2"})
	auth:depends({mode="sta-wds", eap_type="ttls", encryption="wpa"})

	cacert2 = s:taboption("encryption", FileUpload, "ca_cert2", translate("Path to inner CA-Certificate"))
	cacert2:depends({mode="sta", auth="EAP-TLS", encryption="wpa"})
	cacert2:depends({mode="sta", auth="EAP-TLS", encryption="wpa2"})
	cacert2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa"})
	cacert2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa2"})

	clientcert2 = s:taboption("encryption", FileUpload, "client_cert2", translate("Path to inner Client-Certificate"))
	clientcert2:depends({mode="sta", auth="EAP-TLS", encryption="wpa"})
	clientcert2:depends({mode="sta", auth="EAP-TLS", encryption="wpa2"})
	clientcert2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa"})
	clientcert2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa2"})

	privkey2 = s:taboption("encryption", FileUpload, "priv_key2", translate("Path to inner Private Key"))
	privkey2:depends({mode="sta", auth="EAP-TLS", encryption="wpa"})
	privkey2:depends({mode="sta", auth="EAP-TLS", encryption="wpa2"})
	privkey2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa"})
	privkey2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa2"})

	privkeypwd2 = s:taboption("encryption", Value, "priv_key2_pwd", translate("Password of inner Private Key"))
	privkeypwd2:depends({mode="sta", auth="EAP-TLS", encryption="wpa"})
	privkeypwd2:depends({mode="sta", auth="EAP-TLS", encryption="wpa2"})
	privkeypwd2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa"})
	privkeypwd2:depends({mode="sta-wds", auth="EAP-TLS", encryption="wpa2"})
	privkeypwd2.rmempty = true
	privkeypwd2.password = true

	identity = s:taboption("encryption", Value, "identity", translate("Identity"))
	identity:depends({mode="sta", eap_type="fast", encryption="wpa2"})
	identity:depends({mode="sta", eap_type="fast", encryption="wpa"})
	identity:depends({mode="sta", eap_type="peap", encryption="wpa2"})
	identity:depends({mode="sta", eap_type="peap", encryption="wpa"})
	identity:depends({mode="sta", eap_type="ttls", encryption="wpa2"})
	identity:depends({mode="sta", eap_type="ttls", encryption="wpa"})
	identity:depends({mode="sta-wds", eap_type="fast", encryption="wpa2"})
	identity:depends({mode="sta-wds", eap_type="fast", encryption="wpa"})
	identity:depends({mode="sta-wds", eap_type="peap", encryption="wpa2"})
	identity:depends({mode="sta-wds", eap_type="peap", encryption="wpa"})
	identity:depends({mode="sta-wds", eap_type="ttls", encryption="wpa2"})
	identity:depends({mode="sta-wds", eap_type="ttls", encryption="wpa"})
	identity:depends({mode="sta", eap_type="tls", encryption="wpa2"})
	identity:depends({mode="sta", eap_type="tls", encryption="wpa"})
	identity:depends({mode="sta-wds", eap_type="tls", encryption="wpa2"})
	identity:depends({mode="sta-wds", eap_type="tls", encryption="wpa"})

	anonymous_identity = s:taboption("encryption", Value, "anonymous_identity", translate("Anonymous Identity"))
	anonymous_identity:depends({mode="sta", eap_type="fast", encryption="wpa2"})
	anonymous_identity:depends({mode="sta", eap_type="fast", encryption="wpa"})
	anonymous_identity:depends({mode="sta", eap_type="peap", encryption="wpa2"})
	anonymous_identity:depends({mode="sta", eap_type="peap", encryption="wpa"})
	anonymous_identity:depends({mode="sta", eap_type="ttls", encryption="wpa2"})
	anonymous_identity:depends({mode="sta", eap_type="ttls", encryption="wpa"})
	anonymous_identity:depends({mode="sta-wds", eap_type="fast", encryption="wpa2"})
	anonymous_identity:depends({mode="sta-wds", eap_type="fast", encryption="wpa"})
	anonymous_identity:depends({mode="sta-wds", eap_type="peap", encryption="wpa2"})
	anonymous_identity:depends({mode="sta-wds", eap_type="peap", encryption="wpa"})
	anonymous_identity:depends({mode="sta-wds", eap_type="ttls", encryption="wpa2"})
	anonymous_identity:depends({mode="sta-wds", eap_type="ttls", encryption="wpa"})
	anonymous_identity:depends({mode="sta", eap_type="tls", encryption="wpa2"})
	anonymous_identity:depends({mode="sta", eap_type="tls", encryption="wpa"})
	anonymous_identity:depends({mode="sta-wds", eap_type="tls", encryption="wpa2"})
	anonymous_identity:depends({mode="sta-wds", eap_type="tls", encryption="wpa"})

	password = s:taboption("encryption", Value, "password", translate("Password"))
	password:depends({mode="sta", eap_type="fast", encryption="wpa2"})
	password:depends({mode="sta", eap_type="fast", encryption="wpa"})
	password:depends({mode="sta", eap_type="peap", encryption="wpa2"})
	password:depends({mode="sta", eap_type="peap", encryption="wpa"})
	password:depends({mode="sta", eap_type="ttls", encryption="wpa2"})
	password:depends({mode="sta", eap_type="ttls", encryption="wpa"})
	password:depends({mode="sta-wds", eap_type="fast", encryption="wpa2"})
	password:depends({mode="sta-wds", eap_type="fast", encryption="wpa"})
	password:depends({mode="sta-wds", eap_type="peap", encryption="wpa2"})
	password:depends({mode="sta-wds", eap_type="peap", encryption="wpa"})
	password:depends({mode="sta-wds", eap_type="ttls", encryption="wpa2"})
	password:depends({mode="sta-wds", eap_type="ttls", encryption="wpa"})
	password.rmempty = true
	password.password = true
end

-- ieee802.11w options
if hwtype == "mac80211" then
	local has_80211w = (os.execute("hostapd -v11w 2>/dev/null || hostapd -veap 2>/dev/null") == 0)
	if has_80211w then
		ieee80211w = s:taboption("encryption", ListValue, "ieee80211w",
			translate("802.11w Management Frame Protection"),
			translate("Requires the 'full' version of wpad/hostapd " ..
				"and support from the wifi driver <br />(as of Feb 2017: " ..
				"ath9k and ath10k, in LEDE also mwlwifi and mt76)"))
		ieee80211w.default = ""
		ieee80211w.rmempty = true
		ieee80211w:value("", translate("Disabled (default)"))
		ieee80211w:value("1", translate("Optional"))
		ieee80211w:value("2", translate("Required"))
		ieee80211w:depends({mode="ap", encryption="wpa2"})
		ieee80211w:depends({mode="ap-wds", encryption="wpa2"})
		ieee80211w:depends({mode="ap", encryption="psk2"})
		ieee80211w:depends({mode="ap", encryption="psk-mixed"})
		ieee80211w:depends({mode="ap-wds", encryption="psk2"})
		ieee80211w:depends({mode="ap-wds", encryption="psk-mixed"})

		max_timeout = s:taboption("encryption", Value, "ieee80211w_max_timeout",
				translate("802.11w maximum timeout"),
				translate("802.11w Association SA Query maximum timeout"))
		max_timeout:depends({ieee80211w="1"})
		max_timeout:depends({ieee80211w="2"})
		max_timeout.datatype = "uinteger"
		max_timeout.placeholder = "1000"
		max_timeout.rmempty = true

		retry_timeout = s:taboption("encryption", Value, "ieee80211w_retry_timeout",
				translate("802.11w retry timeout"),
				translate("802.11w Association SA Query retry timeout"))
		retry_timeout:depends({ieee80211w="1"})
		retry_timeout:depends({ieee80211w="2"})
		retry_timeout.datatype = "uinteger"
		retry_timeout.placeholder = "201"
		retry_timeout.rmempty = true
	end

	key_retries = s:taboption("encryption", Flag, "wpa_disable_eapol_key_retries",
		translate("Enable key reinstallation (KRACK) countermeasures"),
		translate("Complicates key reinstallation attacks on the client side by disabling retransmission of EAPOL-Key frames that are used to install keys. This workaround might cause interoperability issues and reduced robustness of key negotiation especially in environments with heavy traffic load."))

	key_retries:depends({mode="ap", encryption="wpa2"})
	key_retries:depends({mode="ap", encryption="psk2"})
	key_retries:depends({mode="ap", encryption="psk-mixed"})
	key_retries:depends({mode="ap-wds", encryption="wpa2"})
	key_retries:depends({mode="ap-wds", encryption="psk2"})
	key_retries:depends({mode="ap-wds", encryption="psk-mixed"})
end

if hwtype == "mac80211" or hwtype == "prism2" then
	local wpasupplicant = fs.access("/usr/sbin/wpa_supplicant")
	local hostcli = fs.access("/usr/sbin/hostapd_cli")
	if hostcli and wpasupplicant then
		wps = s:taboption("encryption", Flag, "wps_pushbutton", translate("Enable WPS pushbutton, requires WPA(2)-PSK"))
		wps.enabled = "1"
		wps.disabled = "0"
		wps.rmempty = false
		wps:depends("encryption", "psk")
		wps:depends("encryption", "psk2")
		wps:depends("encryption", "psk-mixed")
	end
end

return m
