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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()
local tools = require "luci.tools.ffwizard"
local util = require "luci.util"
local io = require "io"
-------------------- 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("network", "interface",
function(section)
if section[".name"] ~= "siit0" then
dev:value(section[".name"])
end
end)
-------------------- Control --------------------
LL_PREFIX = luci.ip.IPv6("fe80::/16")
--
-- find link-local address
--
function find_ll(dev)
for _, r in ipairs(luci.sys.net.routes6()) do
if r.device == dev and LL_PREFIX:contains(r.dest) 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)
--
-- Determine defaults
--
local ula_prefix = uci:get("siit", "defaults", "ula_prefix") or "fd00::"
local ula_global = uci:get("siit", "defaults", "ula_global") or "00ca:ffee:babe::" -- = Freifunk
local ula_subnet = uci:get("siit", "defaults", "ula_subnet") or "0000:0000:0000:4223::" -- = Berlin
local siit_prefix = uci:get("siit", "defaults", "siit_prefix") or "::ffff:ffff:0000:0000"
local siit_route = luci.ip.IPv6(siit_prefix .. "/96")
-- Find wifi interface
local device = dev:formvalue(section)
--
-- Generate ULA
--
local ula = luci.ip.IPv6("::")
for _, prefix in ipairs({ ula_prefix, ula_global, ula_subnet }) do
ula = ula:add(luci.ip.IPv6(prefix))
end
ula = ula:add(find_ll(uci:get("network", device, "ifname") or device))
--
-- 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)
--
-- 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
local lan_ip = luci.ip.IPv4(
uci:get("network", "lan", "ipaddr"),
uci:get("network", "lan", "netmask")
)
siit_route = luci.ip.IPv6(
siit_prefix .. "/" .. (96 + lan_ip:prefix())
):add(lan_ip[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 = device,
target = siit_route:string()
})
-- interface
uci:set("network", device, "ip6addr", ula:string())
uci:set("network", "lan", "mtu", 1400)
uci:set("olsrd", "general", "IpVersion", 6)
uci:foreach("olsrd", "Interface",
function(s)
if s.interface == device then
uci:set("olsrd", s[".name"], "Ip6AddrType", "global")
end
uci:delete("olsrd", s[".name"], "Ip4Boradcast")
end)
-- 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("network")
uci:save("olsrd")
end
return f
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