--[[
LuCI - Lua Configuration Interface

Copyright 2008 Steven Barth <steven@midlink.org>
Copyright 2011 Jo-Philipp Wich <xm@subsignal.org>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

$Id: network.lua 8052 2011-12-05 19:44:20Z jow $
]]--

module("luci.controller.admin.network", package.seeall)

function index()
	local uci = require("luci.model.uci").cursor()
	local net = require "luci.model.network".init(uci)
	local has_wifi = nixio.fs.stat("/etc/config/wireless")
	local has_switch = false

	uci:foreach("network", "switch",
		function(s)
			has_switch = true
			return false
		end
	)

	local page

	page = node("admin", "network")
	page.target = firstchild()
	page.title  = _("Network")
	page.order  = 50
	page.index  = true

	if has_switch then
		page  = node("admin", "network", "vlan")
		page.target = cbi("admin_network/vlan")
		page.title  = _("Switch")
		page.order  = 20
	end

	if has_wifi and has_wifi.size > 0 then
		page = entry({"admin", "network", "wireless"}, arcombine(template("admin_network/wifi_overview"), cbi("admin_network/wifi")), _("Wifi"), 15)
		page.leaf = true
		page.subindex = true

		page = entry({"admin", "network", "wireless_join"}, call("wifi_join"), nil)
		page.leaf = true

		page = entry({"admin", "network", "wireless_add"}, call("wifi_add"), nil)
		page.leaf = true

		page = entry({"admin", "network", "wireless_delete"}, call("wifi_delete"), nil)
		page.leaf = true

		page = entry({"admin", "network", "wireless_status"}, call("wifi_status"), nil)
		page.leaf = true

		page = entry({"admin", "network", "wireless_reconnect"}, call("wifi_reconnect"), nil)
		page.leaf = true

		page = entry({"admin", "network", "wireless_shutdown"}, call("wifi_reconnect"), nil)
		page.leaf = true

		local wdev
		for _, wdev in ipairs(net:get_wifidevs()) do
			local wnet
			for _, wnet in ipairs(wdev:get_wifinets()) do
				entry(
					{"admin", "network", "wireless", wnet:id()},
					alias("admin", "network", "wireless"),
					wdev:name() .. ": " .. wnet:shortname()
				)
			end
		end
	end

	page = entry({"admin", "network", "network"}, arcombine(cbi("admin_network/network"), cbi("admin_network/ifaces")), _("Interfaces"), 10)
	page.leaf   = true
	page.subindex = true

	page = entry({"admin", "network", "iface_add"}, cbi("admin_network/iface_add"), nil)
	page.leaf = true

	page = entry({"admin", "network", "iface_delete"}, call("iface_delete"), nil)
	page.leaf = true

	page = entry({"admin", "network", "iface_status"}, call("iface_status"), nil)
	page.leaf = true

	page = entry({"admin", "network", "iface_reconnect"}, call("iface_reconnect"), nil)
	page.leaf = true

	page = entry({"admin", "network", "iface_shutdown"}, call("iface_shutdown"), nil)
	page.leaf = true

	uci:foreach("network", "interface",
		function (section)
			local ifc = section[".name"]
			if ifc ~= "loopback" then
				entry({"admin", "network", "network", ifc},
				 true,
				 ifc:upper())
			end
		end
	)

	if nixio.fs.access("/etc/config/dhcp") then
		page = node("admin", "network", "dhcp")
		page.target = cbi("admin_network/dhcp")
		page.title  = _("DHCP and DNS")
		page.order  = 30

		page = entry({"admin", "network", "dhcplease_status"}, call("lease_status"), nil)
		page.leaf = true

		page = node("admin", "network", "hosts")
		page.target = cbi("admin_network/hosts")
		page.title  = _("Hostnames")
		page.order  = 40
	end

	page  = node("admin", "network", "routes")
	page.target = cbi("admin_network/routes")
	page.title  = _("Static Routes")
	page.order  = 50

	page = node("admin", "network", "diagnostics")
	page.target = template("admin_network/diagnostics")
	page.title  = _("Diagnostics")
	page.order  = 60

	page = entry({"admin", "network", "diag_ping"}, call("diag_ping"), nil)
	page.leaf = true

	page = entry({"admin", "network", "diag_nslookup"}, call("diag_nslookup"), nil)
	page.leaf = true

	page = entry({"admin", "network", "diag_traceroute"}, call("diag_traceroute"), nil)
	page.leaf = true
end

function wifi_join()
	local function param(x)
		return luci.http.formvalue(x)
	end

	local function ptable(x)
		x = param(x)
		return x and (type(x) ~= "table" and { x } or x) or {}
	end

	local dev  = param("device")
	local ssid = param("join")

	if dev and ssid then
		local cancel  = (param("cancel") or param("cbi.cancel")) and true or false

		if cancel then
			luci.http.redirect(luci.dispatcher.build_url("admin/network/wireless_join?device=" .. dev))
		else
			local cbi = require "luci.cbi"
			local tpl = require "luci.template"
			local map = luci.cbi.load("admin_network/wifi_add")[1]

			if map:parse() ~= cbi.FORM_DONE then
				tpl.render("header")
				map:render()
				tpl.render("footer")
			end
		end
	else
		luci.template.render("admin_network/wifi_join")
	end
end

function wifi_add()
	local dev = luci.http.formvalue("device")
	local ntm = require "luci.model.network".init()

	dev = dev and ntm:get_wifidev(dev)

	if dev then
		local net = dev:add_wifinet({
			mode       = "ap",
			ssid       = "OpenWrt",
			encryption = "none"
		})

		ntm:save("wireless")
		luci.http.redirect(net:adminlink())
	end
end

function wifi_delete(network)
	local ntm = require "luci.model.network".init()
	local wnet = ntm:get_wifinet(network)
	if wnet then
		local dev = wnet:get_device()
		local net = wnet:get_network()
		if dev then
			luci.sys.call("env -i /sbin/wifi down %q >/dev/null" % dev:name())
			ntm:del_wifinet(network)
			ntm:commit("wireless")
			if net:is_empty() then
				ntm:del_network(net:name())
				ntm:commit("network")
			end
			luci.sys.call("env -i /sbin/wifi up %q >/dev/null" % dev:name())
		end
	end

	luci.http.redirect(luci.dispatcher.build_url("admin/network/wireless"))
end

function iface_status()
	local path = luci.dispatcher.context.requestpath
	local netm = require "luci.model.network".init()
	local rv   = { }

	local iface
	for iface in path[#path]:gmatch("[%w%.%-_]+") do
		local net = netm:get_network(iface)
		local device = net and net:get_interface()
		if device then
			local data = {
				id         = iface,
				proto      = net:proto(),
				uptime     = net:uptime(),
				gwaddr     = net:gwaddr(),
				dnsaddrs   = net:dnsaddrs(),
				name       = device:shortname(),
				type       = device:type(),
				ifname     = device:name(),
				macaddr    = device:mac(),
				is_up      = device:is_up(),
				rx_bytes   = device:rx_bytes(),
				tx_bytes   = device:tx_bytes(),
				rx_packets = device:rx_packets(),
				tx_packets = device:tx_packets(),

				ipaddrs    = { },
				ip6addrs   = { },
				subdevices = { }
			}

			local _, a
			for _, a in ipairs(device:ipaddrs()) do
				data.ipaddrs[#data.ipaddrs+1] = {
					addr      = a:host():string(),
					netmask   = a:mask():string(),
					prefix    = a:prefix()
				}
			end
			for _, a in ipairs(device:ip6addrs()) do
				data.ip6addrs[#data.ip6addrs+1] = {
					addr      = a:host():string(),
					netmask   = a:mask():string(),
					prefix    = a:prefix()
				}
			end

			for _, device in ipairs(net:get_interfaces() or {}) do
				data.subdevices[#data.subdevices+1] = {
					name       = device:shortname(),
					type       = device:type(),
					ifname     = device:name(),
					macaddr    = device:mac(),
					macaddr    = device:mac(),
					is_up      = device:is_up(),
					rx_bytes   = device:rx_bytes(),
					tx_bytes   = device:tx_bytes(),
					rx_packets = device:rx_packets(),
					tx_packets = device:tx_packets(),
				}
			end

			rv[#rv+1] = data
		else
			rv[#rv+1] = {
				id   = iface,
				name = iface,
				type = "ethernet"
			}
		end
	end

	if #rv > 0 then
		luci.http.prepare_content("application/json")
		luci.http.write_json(rv)
		return
	end

	luci.http.status(404, "No such device")
end

function iface_reconnect()
	local path  = luci.dispatcher.context.requestpath
	local iface = path[#path]
	local netmd = require "luci.model.network".init()

	local net = netmd:get_network(iface)
	if net then
		luci.sys.call("env -i /sbin/ifup %q >/dev/null 2>/dev/null" % iface)
		luci.http.status(200, "Reconnected")
		return
	end

	luci.http.status(404, "No such interface")
end

function iface_shutdown()
	local path  = luci.dispatcher.context.requestpath
	local iface = path[#path]
	local netmd = require "luci.model.network".init()

	local net = netmd:get_network(iface)
	if net then
		luci.sys.call("env -i /sbin/ifdown %q >/dev/null 2>/dev/null" % iface)
		luci.http.status(200, "Shutdown")
		return
	end

	luci.http.status(404, "No such interface")
end

function iface_delete()
	local path  = luci.dispatcher.context.requestpath
	local iface = path[#path]
	local netmd = require "luci.model.network".init()

	local net = netmd:del_network(iface)
	if net then
		luci.sys.call("env -i /sbin/ifdown %q >/dev/null 2>/dev/null" % iface)
		luci.http.redirect(luci.dispatcher.build_url("admin/network/network"))
		netmd:commit("network")
		netmd:commit("wireless")
		return
	end

	luci.http.status(404, "No such interface")
end

function wifi_status()
	local path = luci.dispatcher.context.requestpath
	local s    = require "luci.tools.status"
	local rv   = { }

	local dev
	for dev in path[#path]:gmatch("[%w%.%-]+") do
		rv[#rv+1] = s.wifi_network(dev)
	end

	if #rv > 0 then
		luci.http.prepare_content("application/json")
		luci.http.write_json(rv)
		return
	end

	luci.http.status(404, "No such device")
end

function wifi_reconnect()
	local path  = luci.dispatcher.context.requestpath
	local mode  = path[#path-1]
	local wnet  = path[#path]
	local netmd = require "luci.model.network".init()

	local net = netmd:get_wifinet(wnet)
	local dev = net:get_device()
	if dev and net then
		luci.sys.call("env -i /sbin/wifi down >/dev/null 2>/dev/null")

		dev:set("disabled", nil)
		net:set("disabled", (mode == "wireless_shutdown") and 1 or nil)
		netmd:commit("wireless")

		luci.sys.call("env -i /sbin/wifi up >/dev/null 2>/dev/null")
		luci.http.status(200, (mode == "wireless_shutdown") and "Shutdown" or "Reconnected")

		return
	end

	luci.http.status(404, "No such radio")
end

function lease_status()
	local s = require "luci.tools.status"

	luci.http.prepare_content("application/json")
	luci.http.write_json(s.dhcp_leases())
end

function diag_command(cmd)
	local path = luci.dispatcher.context.requestpath
	local addr = path[#path]

	if addr and addr:match("^[a-zA-Z0-9%-%.:_]+$") then
		luci.http.prepare_content("text/plain")

		local util = io.popen(cmd % addr)
		if util then
			while true do
				local ln = util:read("*l")
				if not ln then break end
				luci.http.write(ln)
				luci.http.write("\n")
			end

			util:close()
		end

		return
	end

	luci.http.status(500, "Bad address")
end

function diag_ping()
	diag_command("ping -c 5 -W 1 %q 2>&1")
end

function diag_traceroute()
	diag_command("traceroute -q 1 -w 1 -n %q 2>&1")
end

function diag_nslookup()
	diag_command("nslookup %q 2>&1")
end
