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-- ------ extra functions ------ --

function interfaceCheck()
	metricValue = ut.trim(sys.exec("uci -p /var/state get network." .. arg[1] .. ".metric"))
	if metricValue == "" then -- no metric
		errorNoMetric = 1
	else -- if metric exists create list of interface metrics to compare against for duplicates
		uci.cursor():foreach("mwan3", "interface",
			function (section)
				local metricValue = ut.trim(sys.exec("uci -p /var/state get network." .. section[".name"] .. ".metric"))
				metricList = metricList .. section[".name"] .. " " .. metricValue .. "\n"
			end
		)
		-- compare metric against list
		local metricDuplicateNumbers, metricDuplicates = sys.exec("echo '" .. metricList .. "' | awk '{print $2}' | uniq -d"), ""
		for line in metricDuplicateNumbers:gmatch("[^\r\n]+") do
			metricDuplicates = sys.exec("echo '" .. metricList .. "' | grep '" .. line .. "' | awk '{print $1}'")
			errorDuplicateMetricList = errorDuplicateMetricList .. metricDuplicates
		end
		if sys.exec("echo '" .. errorDuplicateMetricList .. "' | grep -w " .. arg[1]) ~= "" then
			errorDuplicateMetric = 1
		end
	end
	-- check if this interface has a higher reliability requirement than track IPs configured
	local trackingNumber = tonumber(ut.trim(sys.exec("echo $(uci -p /var/state get mwan3." .. arg[1] .. ".track_ip) | wc -w")))
	if trackingNumber > 0 then
		local reliabilityNumber = tonumber(ut.trim(sys.exec("uci -p /var/state get mwan3." .. arg[1] .. ".reliability")))
		if reliabilityNumber and reliabilityNumber > trackingNumber then
			errorReliability = 1
		end
	end
	-- check if any interfaces are not properly configured in /etc/config/network or have no default route in main routing table
	if ut.trim(sys.exec("uci -p /var/state get network." .. arg[1])) == "interface" then
		local interfaceDevice = ut.trim(sys.exec("uci -p /var/state get network." .. arg[1] .. ".ifname"))
		if interfaceDevice == "uci: Entry not found" or interfaceDevice == "" then
			errorNetConfig = 1
			errorRoute = 1
		else
			local routeCheck = ut.trim(sys.exec("route -n | awk '{if ($8 == \"" .. interfaceDevice .. "\" && $1 == \"0.0.0.0\" && $3 == \"0.0.0.0\") print $1}'"))
			if routeCheck == "" then
				errorRoute = 1
			end
		end
	else
		errorNetConfig = 1
		errorRoute = 1
	end
end

function interfaceWarnings() -- display warning messages at the top of the page
	local warns, lineBreak = "", ""
	if errorReliability == 1 then
		warns = "<font color=\"ff0000\"><strong>" .. translate("WARNING: this interface has a higher reliability requirement than there are tracking IP addresses!") .. "</strong></font>"
		lineBreak = "<br /><br />"
	end
	if errorRoute == 1 then
		warns = warns .. lineBreak .. "<font color=\"ff0000\"><strong>" .. translate("WARNING: this interface has no default route in the main routing table!") .. "</strong></font>"
		lineBreak = "<br /><br />"
	end
	if errorNetConfig == 1 then
		warns = warns .. lineBreak .. "<font color=\"ff0000\"><strong>" .. translate("WARNING: this interface is configured incorrectly or not at all in /etc/config/network!") .. "</strong></font>"
		lineBreak = "<br /><br />"
	end
	if errorNoMetric == 1 then
		warns = warns .. lineBreak .. "<font color=\"ff0000\"><strong>" .. translate("WARNING: this interface has no metric configured in /etc/config/network!") .. "</strong></font>"
	elseif errorDuplicateMetric == 1 then
		warns = warns .. lineBreak .. "<font color=\"ff0000\"><strong>" .. translate("WARNING: this and other interfaces have duplicate metrics configured in /etc/config/network!") .. "</strong></font>"
	end
	return warns
end

-- ------ interface configuration ------ --

dsp = require "luci.dispatcher"
sys = require "luci.sys"
ut = require "luci.util"
arg[1] = arg[1] or ""

metricValue = ""
metricList = ""
errorDuplicateMetricList = ""
errorNoMetric = 0
errorDuplicateMetric = 0
errorRoute = 0
errorNetConfig = 0
errorReliability = 0
interfaceCheck()


m5 = Map("mwan3", translatef("MWAN Interface Configuration - %s", arg[1]),
	interfaceWarnings())
	m5.redirect = dsp.build_url("admin", "network", "mwan", "configuration", "interface")


mwan_interface = m5:section(NamedSection, arg[1], "interface", "")
	mwan_interface.addremove = false
	mwan_interface.dynamic = false


enabled = mwan_interface:option(ListValue, "enabled", translate("Enabled"))
	enabled.default = "1"
	enabled:value("1", translate("Yes"))
	enabled:value("0", translate("No"))

initial_state = mwan_interface:option(ListValue, "initial_state", translate("Initial state"),
	translate("Expect interface state on up event"))
	initial_state.default = "online"
	initial_state:value("online", translate("Online"))
	initial_state:value("offline", translate("Offline"))

family = mwan_interface:option(ListValue, "family", translate("Internet Protocol"))
	family.default = "ipv4"
	family:value("ipv4", translate("IPv4"))
	family:value("ipv6", translate("IPv6"))

track_ip = mwan_interface:option(DynamicList, "track_ip", translate("Tracking hostname or IP address"),
	translate("This hostname or IP address will be pinged to determine if the link is up or down. Leave blank to assume interface is always online"))
	track_ip.datatype = "host"

track_method = mwan_interface:option(ListValue, "track_method", translate("Tracking method"))
	track_method.default = "ping"
	track_method:value("ping")
	track_method:value("arping")
	track_method:value("httping")

reliability = mwan_interface:option(Value, "reliability", translate("Tracking reliability"),
	translate("Acceptable values: 1-100. This many Tracking IP addresses must respond for the link to be deemed up"))
	reliability.datatype = "range(1, 100)"
	reliability.default = "1"

count = mwan_interface:option(ListValue, "count", translate("Ping count"))
	count.default = "1"
	count:value("1")
	count:value("2")
	count:value("3")
	count:value("4")
	count:value("5")

size = mwan_interface:option(Value, "size", translate("Ping size"))
	size.default = "56"
	size:value("8")
	size:value("24")
	size:value("56")
	size:value("120")
	size:value("248")
	size:value("504")
	size:value("1016")
	size:value("1472")
	size:value("2040")
	size.datatype = "range(1, 65507)"
	size.rmempty = false
	size.optional = false

timeout = mwan_interface:option(ListValue, "timeout", translate("Ping timeout"))
	timeout.default = "2"
	timeout:value("1", translatef("%d second", 1))
	timeout:value("2", translatef("%d seconds", 2))
	timeout:value("3", translatef("%d seconds", 3))
	timeout:value("4", translatef("%d seconds", 4))
	timeout:value("5", translatef("%d seconds", 5))
	timeout:value("6", translatef("%d seconds", 6))
	timeout:value("7", translatef("%d seconds", 7))
	timeout:value("8", translatef("%d seconds", 8))
	timeout:value("9", translatef("%d seconds", 9))
	timeout:value("10", translatef("%d seconds", 10))

interval = mwan_interface:option(ListValue, "interval", translate("Ping interval"))
	interval.default = "5"
	interval:value("1", translatef("%d second", 1))
	interval:value("3", translatef("%d seconds", 3))
	interval:value("5", translatef("%d seconds", 5))
	interval:value("10", translatef("%d seconds", 10))
	interval:value("20", translatef("%d seconds", 20))
	interval:value("30", translatef("%d seconds", 30))
	interval:value("60", translatef("%d minute", 1))
	interval:value("300", translatef("%d minutes", 5))
	interval:value("600", translatef("%d minutes", 10))
	interval:value("900", translatef("%d minutes", 15))
	interval:value("1800", translatef("%d minutes", 30))
	interval:value("3600", translatef("%d hour", 1))

failure = mwan_interface:option(Value, "failure_interval", translate("Failure interval"),
	translate("Ping interval during failure detection"))
	failure.default = "5"
	failure:value("1", translatef("%d second", 1))
	failure:value("3", translatef("%d seconds", 3))
	failure:value("5", translatef("%d seconds", 5))
	failure:value("10", translatef("%d seconds", 10))
	failure:value("20", translatef("%d seconds", 20))
	failure:value("30", translatef("%d seconds", 30))
	failure:value("60", translatef("%d minute", 1))
	failure:value("300", translatef("%d minutes", 5))
	failure:value("600", translatef("%d minutes", 10))
	failure:value("900", translatef("%d minutes", 15))
	failure:value("1800", translatef("%d minutes", 30))
	failure:value("3600", translatef("%d hour", 1))

keep_failure = mwan_interface:option(Flag, "keep_failure_interval", translate("Keep failure interval"),
	translate("Keep ping failure interval during failure state"))
	keep_failure.default = keep_failure.disabled

recovery = mwan_interface:option(Value, "recovery_interval", translate("Recovery interval"),
	translate("Ping interval during failure recovering"))
	recovery.default = "5"
	recovery:value("1", translatef("%d second", 1))
	recovery:value("3", translatef("%d seconds", 3))
	recovery:value("5", translatef("%d seconds", 5))
	recovery:value("10", translatef("%d seconds", 10))
	recovery:value("20", translatef("%d seconds", 20))
	recovery:value("30", translatef("%d seconds", 30))
	recovery:value("60", translatef("%d minute", 1))
	recovery:value("300", translatef("%d minutes", 5))
	recovery:value("600", translatef("%d minutes", 10))
	recovery:value("900", translatef("%d minutes", 15))
	recovery:value("1800", translatef("%d minutes", 30))
	recovery:value("3600", translatef("%d hour", 1))

down = mwan_interface:option(ListValue, "down", translate("Interface down"),
	translate("Interface will be deemed down after this many failed ping tests"))
	down.default = "3"
	down:value("1")
	down:value("2")
	down:value("3")
	down:value("4")
	down:value("5")
	down:value("6")
	down:value("7")
	down:value("8")
	down:value("9")
	down:value("10")

up = mwan_interface:option(ListValue, "up", translate("Interface up"),
	translate("Downed interface will be deemed up after this many successful ping tests"))
	up.default = "3"
	up:value("1")
	up:value("2")
	up:value("3")
	up:value("4")
	up:value("5")
	up:value("6")
	up:value("7")
	up:value("8")
	up:value("9")
	up:value("10")

flush = mwan_interface:option(ListValue, "flush_conntrack", translate("Flush conntrack table"),
	translate("Flush global firewall conntrack table on interface events"))
	flush.default = "never"
	flush:value("ifup", translate("ifup"))
	flush:value("ifdown", translate("ifdown"))
	flush:value("never", translate("never"))
	flush:value("always", translate("always"))

metric = mwan_interface:option(DummyValue, "metric", translate("Metric"),
	translate("This displays the metric assigned to this interface in /etc/config/network"))
	metric.rawhtml = true
	function metric.cfgvalue(self, s)
		if errorNoMetric == 0 then
			return metricValue
		else
			return "&#8212;"
		end
	end


return m5