applications/luci-siitwizard/luasrc/model/cbi/siitwizard.lua

   1 --[[
   2 LuCI - Lua Configuration Interface
   3
   4 Copyright 2008 Steven Barth <steven@midlink.org>
   5 Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
   6
   7 Licensed under the Apache License, Version 2.0 (the "License");
   8 you may not use this file except in compliance with the License.
   9 You may obtain a copy of the License at
  10
  11 http://www.apache.org/licenses/LICENSE-2.0
  12
  13 $Id$
  14
  15 ]]--
  16
  17 local uci = require "luci.model.uci".cursor()
  18
  19 -------------------- Init --------------------
  20
  21 --
  22 -- Find link-local address
  23 --
  24 LL_PREFIX = luci.ip.IPv6("fe80::/64")
  25 function find_ll()
  26         for _, r in ipairs(luci.sys.net.routes6()) do
  27                 if LL_PREFIX:contains(r.dest) and r.dest:higher(LL_PREFIX) then
  28                         return r.dest:sub(LL_PREFIX)
  29                 end
  30         end
  31         return luci.ip.IPv6("::")
  32 end
  33
  34 --
  35 -- Determine defaults
  36 --
  37 local ula_prefix  = uci:get("siit", "ipv6", "ula_prefix")  or "fd00::"
  38 local ula_global  = uci:get("siit", "ipv6", "ula_global")  or "00ca:ffee:babe::"                -- = Freifunk
  39 local ula_subnet  = uci:get("siit", "ipv6", "ula_subnet")  or "0000:0000:0000:4223::"   -- = Berlin
  40 local siit_prefix = uci:get("siit", "ipv6", "siit_prefix") or "::ffff:0000:0000"
  41 local ipv4_pool   = uci:get("siit", "ipv4", "pool")        or "172.16.0.0/12"
  42 local ipv4_netsz  = uci:get("siit", "ipv4", "netsize")     or "24"
  43
  44 --
  45 -- Find IPv4 allocation pool
  46 --
  47 local gv4_net = luci.ip.IPv4(ipv4_pool)
  48
  49 --
  50 -- Generate ULA
  51 --
  52 local ula = luci.ip.IPv6("::/64")
  53
  54 for _, prefix in ipairs({ ula_prefix, ula_global, ula_subnet }) do
  55         ula = ula:add(luci.ip.IPv6(prefix))
  56 end
  57
  58 ula = ula:add(find_ll())
  59
  60
  61 -------------------- View --------------------
  62 f = SimpleForm("siitwizward", "SIIT-Wizzard",
  63  "This wizzard helps to setup SIIT (IPv4-over-IPv6) translation according to RFC2765.")
  64
  65 f:field(DummyValue, "info_ula", "Mesh ULA address").value = ula:string()
  66
  67 f:field(DummyValue, "ipv4_pool", "IPv4 allocation pool").value =
  68         "%s (%i hosts)" %{ gv4_net:string(), 2 ^ gv4_net:prefix() - 2 }
  69
  70 f:field(DummyValue, "ipv4_size", "IPv4 LAN network prefix").value =
  71         "%i bit (%i hosts)" %{ ipv4_netsz, 2 ^ ( 32 - ipv4_netsz ) - 2 }
  72
  73 mode = f:field(ListValue, "mode", "Operation mode")
  74 mode:value("client", "Client")
  75 mode:value("gateway", "Gateway")
  76
  77 dev = f:field(ListValue, "device", "Wireless device")
  78 uci:foreach("wireless", "wifi-device",
  79         function(section)
  80                 dev:value(section[".name"])
  81         end)
  82
  83 lanip = f:field(Value, "ipaddr", "LAN IPv4 subnet")
  84 function lanip.formvalue(self, section)
  85         local val = self.map:formvalue(self:cbid(section))
  86         local net = luci.ip.IPv4("%s/%i" %{ val, ipv4_netsz })
  87
  88         if net then
  89                 if gv4_net:contains(net) then
  90                         if not net:minhost():equal(net:host()) then
  91                                 self.error = { [section] = true }
  92                                 f.errmessage = "IPv4 address is not the first host of " ..
  93                                         "subnet, expected " .. net:minhost():string()
  94                         end
  95                 else
  96                         self.error = { [section] = true }
  97                         f.errmessage = "IPv4 address is not within the allocation pool"
  98                 end
  99         else
 100                 self.error = { [section] = true }
 101                 f.errmessage = "Invalid IPv4 address given"
 102         end
 103
 104         return val
 105 end
 106
 107 dns = f:field(Value, "dns", "DNS server for LAN clients")
 108 dns.value = "141.1.1.1"
 109
 110 -------------------- Control --------------------
 111 function f.handle(self, state, data)
 112         if state == FORM_VALID then
 113                 luci.http.redirect(luci.dispatcher.build_url("admin", "uci", "changes"))
 114                 return false
 115         end
 116         return true
 117 end
 118
 119 function mode.write(self, section, value)
 120
 121         --
 122         -- Find LAN IPv4 range
 123         --
 124         local lan_net = luci.ip.IPv4(
 125                 ( lanip:formvalue(section) or "172.16.0.1" ) .. "/" .. ipv4_netsz
 126         )
 127
 128         if not lan_net then return end
 129
 130         --
 131         -- Find wifi interface, dns server and hostname
 132         --
 133         local device      = dev:formvalue(section)
 134         local dns_server  = dns:formvalue(section) or "141.1.1.1"
 135         local hostname    = "siit-" .. lan_net:host():string():gsub("%.","-")
 136
 137         --
 138         -- Configure wifi device
 139         --
 140         local wifi_device  = dev:formvalue(section)
 141         local wifi_essid   = uci:get("siit", "wifi", "essid")   or "6mesh.freifunk.net"
 142         local wifi_bssid   = uci:get("siit", "wifi", "bssid")   or "02:ca:ff:ee:ba:be"
 143         local wifi_channel = uci:get("siit", "wifi", "channel") or "1"
 144
 145         -- nuke old device definition
 146         uci:delete_all("wireless", "wifi-iface",
 147                 function(s) return s.device == wifi_device end )
 148
 149         uci:delete_all("network", "interface",
 150                 function(s) return s['.name'] == wifi_device end )
 151
 152         -- create wifi device definition
 153         uci:tset("wireless", wifi_device, {
 154                 disabled  = 0,
 155                 channel   = wifi_channel,
 156 --              txantenna = 1,
 157 --              rxantenna = 1,
 158 --              diversity = 0
 159         })
 160
 161         uci:section("wireless", "wifi-iface", nil, {
 162                 encryption = "none",
 163                 mode       = "adhoc",
 164                 network    = wifi_device,
 165                 device     = wifi_device,
 166                 ssid       = wifi_essid,
 167                 bssid      = wifi_bssid,
 168         })
 169
 170         --
 171         -- Gateway mode
 172         --
 173         --      * wan port is dhcp, lan port is 172.23.1.1/24
 174         --      * siit0 gets a dummy address: 169.254.42.42
 175         --      * wl0 gets an ipv6 address, in this case the fdca:ffee:babe::1:1/64
 176         --      * we do a ::ffff:ffff:0/96 route into siit0, so everything from 6mesh goes into translation.
 177         --      * an HNA6 of ::ffff:ffff:0:0/96 announces the mapped 0.0.0.0/0 ipv4 space.
 178         --      * MTU on WAN, LAN down to 1400, ipv6 headers are slighly larger.
 179
 180         if value == "gateway" then
 181
 182                 -- wan mtu
 183                 uci:set("network", "wan", "mtu", 1400)
 184
 185                 -- lan settings
 186                 uci:tset("network", "lan", {
 187                         mtu     = 1400,
 188                         ipaddr  = lan_net:host():string(),
 189                         netmask = lan_net:mask():string()
 190                 })
 191
 192                 -- use full siit subnet
 193                 siit_route = luci.ip.IPv6(siit_prefix .. "/96")
 194
 195                 -- v4 <-> siit route
 196                 uci:delete_all("network", "route",
 197                         function(s) return s.interface == "siit0" end)
 198
 199                 uci:section("network", "route", nil, {
 200                         interface = "siit0",
 201                         target    = gv4_net:network():string(),
 202                         netmask   = gv4_net:mask():string()
 203                 })
 204
 205         --
 206         -- Client mode
 207         --
 208         --      * 172.23.2.1/24 on its lan, fdca:ffee:babe::1:2 on wl0 and the usual dummy address on siit0.
 209         --      * 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.
 210         --      * same route as HNA6 announcement to catch the traffic out of the mesh.
 211         --      * Also, MTU on LAN reduced to 1400.
 212
 213         else
 214
 215                 -- lan settings
 216                 uci:tset("network", "lan", {
 217                         mtu     = 1400,
 218                         ipaddr  = lan_net:host():string(),
 219                         netmask = lan_net:mask():string()
 220                 })
 221
 222                 -- derive siit subnet from lan config
 223                 siit_route = luci.ip.IPv6(
 224                         siit_prefix .. "/" .. (96 + lan_net:prefix())
 225                 ):add(lan_net[2])
 226
 227                 -- ipv4 <-> siit route
 228                 uci:delete_all("network", "route",
 229                         function(s) return s.interface == "siit0" end)
 230
 231                 -- XXX: kind of a catch all, gv4_net would be better
 232                 --      but does not cover non-local v4 space
 233                 uci:section("network", "route", nil, {
 234                         interface = "siit0",
 235                         target    = "0.0.0.0",
 236                         netmask   = "0.0.0.0"
 237                 })
 238         end
 239
 240         -- setup the firewall
 241         uci:delete_all("firewall", "zone",
 242                 function(s) return (
 243                         s['.name'] == "siit0" or s.name == "siit0" or
 244                         s.network == "siit0" or s['.name'] == wifi_device or
 245                         s.name == wifi_device or s.network == wifi_device
 246                 ) end)
 247
 248         uci:delete_all("firewall", "forwarding",
 249                 function(s) return (
 250                         s.src == wifi_device and s.dest == "siit0" or
 251                         s.dest == wifi_device and s.src == "siit0" or
 252                         s.src == "lan" and s.dest == "siit0" or
 253                         s.dest == "lan" and s.src == "siit0"
 254                 ) end)
 255
 256         uci:section("firewall", "zone", "siit0", {
 257                 name    = "siit0",
 258                 network = "siit0",
 259                 input   = "ACCEPT",
 260                 output  = "ACCEPT",
 261                 forward = "ACCEPT"
 262         })
 263
 264         uci:section("firewall", "zone", wifi_device, {
 265                 name    = wifi_device,
 266                 network = wifi_device,
 267                 input   = "ACCEPT",
 268                 output  = "ACCEPT",
 269                 forward = "ACCEPT"
 270         })
 271
 272         uci:section("firewall", "forwarding", nil, {
 273                 src  = wifi_device,
 274                 dest = "siit0"
 275         })
 276
 277         uci:section("firewall", "forwarding", nil, {
 278                 src  = "siit0",
 279                 dest = wifi_device
 280         })
 281
 282         uci:section("firewall", "forwarding", nil, {
 283                 src  = "lan",
 284                 dest = "siit0"
 285         })
 286
 287         uci:section("firewall", "forwarding", nil, {
 288                 src  = "siit0",
 289                 dest = "lan"
 290         })
 291
 292         -- firewall include
 293         uci:delete_all("firewall", "include",
 294                 function(s) return s.path == "/etc/firewall.user" end)
 295
 296         uci:section("firewall", "include", nil, {
 297                 path = "/etc/firewall.user"
 298         })
 299
 300
 301         -- siit0 interface
 302         uci:delete_all("network", "interface",
 303                 function(s) return ( s.ifname == "siit0" ) end)
 304
 305         uci:section("network", "interface", "siit0", {
 306                 ifname  = "siit0",
 307                 proto   = "none"
 308         })
 309
 310         -- siit0 route
 311         uci:delete_all("network", "route6",
 312                 function(s) return siit_route:contains(luci.ip.IPv6(s.target)) end)
 313
 314         uci:section("network", "route6", nil, {
 315                 interface = "siit0",
 316                 target    = siit_route:string()
 317         })
 318
 319         -- create wifi network interface
 320         uci:section("network", "interface", wifi_device, {
 321                 proto   = "static",
 322                 mtu     = 1400,
 323                 ip6addr = ula:string()
 324         })
 325
 326         -- nuke old olsrd interfaces
 327         uci:delete_all("olsrd", "Interface",
 328                 function(s) return s.interface == wifi_device end)
 329
 330         -- configure olsrd interface
 331         uci:foreach("olsrd", "olsrd",
 332                 function(s) uci:set("olsrd", s['.name'], "IpVersion", 6) end)
 333
 334         uci:section("olsrd", "Interface", nil, {
 335                 ignore      = 0,
 336                 interface   = wifi_device,
 337                 Ip6AddrType = "global"
 338         })
 339
 340         -- hna6
 341         uci:delete_all("olsrd", "Hna6",
 342                 function(s)
 343                         if s.netaddr and s.prefix then
 344                                 return siit_route:contains(luci.ip.IPv6(s.netaddr.."/"..s.prefix))
 345                         end
 346                 end)
 347
 348         uci:section("olsrd", "Hna6", nil, {
 349                 netaddr = siit_route:host():string(),
 350                 prefix  = siit_route:prefix()
 351         })
 352
 353         -- txtinfo v6 & olsrd nameservice
 354         uci:foreach("olsrd", "LoadPlugin",
 355                 function(s)
 356                         if s.library == "olsrd_txtinfo.so.0.1" then
 357                                 uci:set("olsrd", s['.name'], "accept", "::1")
 358                         elseif s.library == "olsrd_nameservice.so.0.3" then
 359                                 uci:set("olsrd", s['.name'], "name", hostname)
 360                         end
 361                 end)
 362
 363         -- lan dns
 364         uci:tset("dhcp", "lan", {
 365                 dhcp_option = "6," .. dns_server
 366         })
 367
 368         -- hostname
 369         uci:foreach("system", "system",
 370                 function(s)
 371                         uci:set("system", s['.name'], "hostname", hostname)
 372                 end)
 373
 374         uci:save("wireless")
 375         uci:save("firewall")
 376         uci:save("network")
 377         uci:save("system")
 378         uci:save("olsrd")
 379         uci:save("dhcp")
 380 end
 381
 382 return f