luci/applications: add experimental SIIT setup assistant

2 files changed, 200 insertions, 0 deletions

diff --git a/applications/luci-siitwizard/luasrc/controller/siitwizard.lua b/applications/luci-siitwizard/luasrc/controller/siitwizard.lua
new file mode 100644
index 0000000000..dabbcaf43b
--- /dev/null
+++ b/applications/luci-siitwizard/luasrc/controller/siitwizard.lua
@@ -0,0 +1,21 @@
+--[[
+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
+
+$Id$
+
+]]--
+
+module "luci.controller.siitwizard"
+
+function index()
+	entry({"admin", "freifunk", "siitwizard"}, form("siitwizard"), "SIIT 4over6 assistent", 50)
+end
diff --git a/applications/luci-siitwizard/luasrc/model/cbi/siitwizard.lua b/applications/luci-siitwizard/luasrc/model/cbi/siitwizard.lua
new file mode 100644
index 0000000000..7274f98e30
--- /dev/null
+++ b/applications/luci-siitwizard/luasrc/model/cbi/siitwizard.lua
@@ -0,0 +1,179 @@
+--[[
+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