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--[[
LuCI - Lua Configuration Interface
Copyright 2008 Steven Barth <steven@midlink.org>
Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
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
$Id$
]]--
local uci = require "luci.model.uci".cursor()
-------------------- View --------------------
f = SimpleForm("siitwizward", "4over6-Assistent",
"Dieser Assistent unterstüzt bei der Einrichtung von IPv4-over-IPv6 Translation.")
mode = f:field(ListValue, "mode", "Betriebsmodus")
mode:value("gateway", "Gateway")
mode:value("client", "Client")
dev = f:field(ListValue, "device", "WLAN-Gerät")
uci:foreach("wireless", "wifi-device",
function(section)
dev:value(section[".name"])
end)
lanip = f:field(Value, "ipaddr", "LAN IP Adresse")
lanip.value = "127.23.1.1"
lanmsk = f:field(Value, "netmask", "LAN Netzmaske")
lanmsk.value = "255.255.0.0"
-------------------- Control --------------------
LL_PREFIX = luci.ip.IPv6("fe80::/64")
--
-- find link-local address
--
function find_ll()
for _, r in ipairs(luci.sys.net.routes6()) do
if LL_PREFIX:contains(r.dest) and r.dest:higher(LL_PREFIX) then
return r.dest:sub(LL_PREFIX)
end
end
return luci.ip.IPv6("::")
end
function f.handle(self, state, data)
if state == FORM_VALID then
luci.http.redirect(luci.dispatcher.build_url("admin", "uci", "changes"))
return false
elseif state == FORM_INVALID then
self.errmessage = "Ungültige Eingabe: Bitte die Formularfelder auf Fehler prüfen."
end
return true
end
function mode.write(self, section, value)
--
-- Configure wifi device
--
local wifi_device = dev:formvalue(section)
local wifi_essid = uci:get("siit", "wifi", "essid") or "6mesh.freifunk.net"
local wifi_bssid = uci:get("siit", "wifi", "bssid") or "02:ca:ff:ee:ba:be"
local wifi_channel = uci:get("siit", "wifi", "channel") or "1"
-- nuke old device definition
uci:delete_all("wireless", "wifi-iface",
function(s) return s.device == wifi_device end )
uci:delete_all("network", "interface",
function(s) return s['.name'] == wifi_device end )
-- create wifi device definition
uci:tset("wireless", wifi_device, {
disabled = 0,
channel = wifi_channel,
-- txantenna = 1,
-- rxantenna = 1,
-- diversity = 0
})
uci:section("wireless", "wifi-iface", nil, {
encryption = "none",
mode = "adhoc",
network = wifi_device,
device = wifi_device,
ssid = wifi_essid,
bssid = wifi_bssid,
})
--
-- Determine defaults
--
local ula_prefix = uci:get("siit", "ipv6", "ula_prefix") or "fd00::"
local ula_global = uci:get("siit", "ipv6", "ula_global") or "00ca:ffee:babe::" -- = Freifunk
local ula_subnet = uci:get("siit", "ipv6", "ula_subnet") or "0000:0000:0000:4223::" -- = Berlin
local siit_prefix = uci:get("siit", "ipv6", "siit_prefix") or "::ffff:0000:0000"
-- Find wifi interface
local device = dev:formvalue(section)
--
-- Generate ULA
--
local ula = luci.ip.IPv6("::/64")
for _, prefix in ipairs({ ula_prefix, ula_global, ula_subnet }) do
ula = ula:add(luci.ip.IPv6(prefix))
end
ula = ula:add(find_ll())
--
-- Gateway mode
--
-- * wan port is dhcp, lan port is 172.23.1.1/24
-- * siit0 gets a dummy address: 169.254.42.42
-- * wl0 gets an ipv6 address, in this case the fdca:ffee:babe::1:1/64
-- * we do a ::ffff:ffff:0/96 route into siit0, so everything from 6mesh goes into translation.
-- * an HNA6 of ::ffff:ffff:0:0/96 announces the mapped 0.0.0.0/0 ipv4 space.
-- * MTU on WAN, LAN down to 1400, ipv6 headers are slighly larger.
if value == "gateway" then
uci:set("network", "wan", "mtu", 1400)
-- use full siit subnet
siit_route = luci.ip.IPv6(siit_prefix .. "/96")
--
-- Client mode
--
-- * 172.23.2.1/24 on its lan, fdca:ffee:babe::1:2 on wl0 and the usual dummy address on siit0.
-- * we do a ::ffff:ffff:172.13.2.0/120 to siit0, because in this case, only traffic directed to clients needs to go into translation.
-- * same route as HNA6 announcement to catch the traffic out of the mesh.
-- * Also, MTU on LAN reduced to 1400.
else
-- lan interface
local lan_net = luci.ip.IPv4(
lanip:formvalue(section) or "192.168.1.1",
lanmsk:formvalue(section) or "255.255.255.0"
)
uci:tset("network", "lan", {
mtu = 1400,
ipaddr = lan_net:host():string(),
netmask = lan_net:mask():string()
})
-- derive siit subnet from lan config
siit_route = luci.ip.IPv6(
siit_prefix .. "/" .. (96 + lan_net:prefix())
):add(lan_net[2])
end
-- siit0 interface
uci:delete_all("network", "interface",
function(s) return ( s.ifname == "siit0" ) end)
uci:section("network", "interface", "siit0", {
ifname = "siit0",
proto = "static",
ipaddr = "169.254.42.42",
netmask = "255.255.255.0"
})
-- siit0 route
uci:delete_all("network", "route6",
function(s) return siit_route:contains(luci.ip.IPv6(s.target)) end)
uci:section("network", "route6", nil, {
interface = "siit0",
target = siit_route:string()
})
-- create wifi network interface
uci:section("network", "interface", wifi_device, {
proto = "static",
mtu = 1400,
ip6addr = ula:string()
})
-- nuke old olsrd interfaces
uci:delete_all("olsrd", "Interface",
function(s) return s.interface == wifi_device end)
-- configure olsrd interface
uci:foreach("olsrd", "olsrd",
function(s) uci:set("olsrd", s['.name'], "IpVersion", 6) end)
uci:section("olsrd", "Interface", nil, {
ignore = 0,
interface = wifi_device,
Ip6AddrType = "global"
})
-- hna6
uci:delete_all("olsrd", "Hna6",
function(s)
if s.netaddr and s.prefix then
return siit_route:contains(luci.ip.IPv6(s.netaddr.."/"..s.prefix))
end
end)
uci:section("olsrd", "Hna6", nil, {
netaddr = siit_route:host():string(),
prefix = siit_route:prefix()
})
uci:save("wireless")
uci:save("network")
uci:save("olsrd")
end
return f
|
