+common = require("cjdns/common")
+uci = require("uci")
+
+UCI = {}
+common.uci = UCI
+
+--- Return the configuration defaults as a table suitable for JSON output
+--
+-- Mostly taken from cjdroute --genconf
+-- @return table with configuration defaults
+function UCI.defaults()
+ return {
+ security = {
+ { setuser = "nobody", keepNetAdmin = 1 },
+ { chroot = "/var/run/" },
+ { nofiles = 0 },
+ { noforks = 1 },
+ { seccomp = 0 },
+ { setupComplete = 1 }
+ },
+ router = {
+ ipTunnel = { outgoingConnections = {}, allowedConnections = {} },
+ interface = { type = "TUNInterface" }
+ },
+ interfaces = { UDPInterface = {}, ETHInterface = {} },
+ authorizedPasswords = {},
+ logging = { logTo = "stdout" }
+ }
+end
+
+--- Return the cjdns configuration as a table suitable for JSON output
+--
+-- Iterates over cjdns, eth_interface, udp_interface, eth_peer, udp_peer,
+-- and password sections. Doesn't include IPTunnel related options yet.
+-- @return table with cjdns configuration
+function UCI.get()
+ local obj = UCI.defaults()
+
+ local cursor = uci.cursor()
+
+ local config = cursor:get_all("cjdns", "cjdns")
+ if not config then return obj end
+
+ obj.ipv6 = config.ipv6
+ obj.publicKey = config.public_key
+ obj.privateKey = config.private_key
+ obj.admin = {
+ bind = config.admin_address .. ":" .. config.admin_port,
+ password = config.admin_password }
+
+ if config.tun_device and string.len(config.tun_device) > 0 then
+ obj.router.interface.tunDevice = config.tun_device
+ end
+
+ for i,section in pairs(obj.security) do
+ if type(section.seccomp) == "number" then
+ obj.security[i].seccomp = tonumber(config.seccomp)
+ end
+ end
+
+ cursor:foreach("cjdns", "iptunnel_outgoing", function(outgoing)
+ table.insert(obj.router.ipTunnel.outgoingConnections, outgoing.public_key)
+ end)
+
+ cursor:foreach("cjdns", "iptunnel_allowed", function(allowed)
+ entry = { publicKey = allowed.public_key }
+ if allowed.ipv4 then
+ entry["ip4Address"] = allowed.ipv4
+ end
+ if allowed.ipv6 then
+ entry["ip6Address"] = allowed.ipv6
+ end
+ table.insert(obj.router.ipTunnel.allowedConnections, entry)
+ end)
+
+ cursor:foreach("cjdns", "eth_interface", function(eth_interface)
+ table.insert(obj.interfaces.ETHInterface, {
+ bind = eth_interface.bind,
+ beacon = tonumber(eth_interface.beacon),
+ connectTo = {}
+ })
+ end)
+
+ cursor:foreach("cjdns", "udp_interface", function(udp_interface)
+ table.insert(obj.interfaces.UDPInterface, {
+ bind = udp_interface.address .. ":" .. udp_interface.port,
+ connectTo = {}
+ })
+ end)
+
+ cursor:foreach("cjdns", "eth_peer", function(eth_peer)
+ if not eth_peer.address == "" then
+ local i = tonumber(eth_peer.interface)
+ obj.interfaces.ETHInterface[i].connectTo[eth_peer.address] = {
+ publicKey = eth_peer.public_key,
+ password = eth_peer.password
+ }
+ end
+ end)
+
+ cursor:foreach("cjdns", "udp_peer", function(udp_peer)
+ local bind = udp_peer.address .. ":" .. udp_peer.port
+ local i = tonumber(udp_peer.interface)
+ obj.interfaces.UDPInterface[i].connectTo[bind] = {
+ user = udp_peer.user,
+ publicKey = udp_peer.public_key,
+ password = udp_peer.password
+ }
+ end)
+
+ cursor:foreach("cjdns", "password", function(password)
+ table.insert(obj.authorizedPasswords, {
+ password = password.password,
+ user = password.user,
+ contact = password.contact
+ })
+ end)
+
+ return obj
+end
+
+--- Parse and save updated configuration from JSON input
+--
+-- Transforms general settings, ETHInterface, UDPInterface, connectTo, and
+-- authorizedPasswords fields into UCI sections, and replaces the UCI config's
+-- contents with them.
+-- @param table JSON input
+-- @return Boolean whether saving succeeded
+function UCI.set(obj)
+ local cursor = uci.cursor()
+
+ for i, section in pairs(cursor:get_all("cjdns")) do
+ cursor:delete("cjdns", section[".name"])
+ end
+
+ local admin_address, admin_port = string.match(obj.admin.bind, "^(.*):(.*)$")
+ UCI.cursor_section(cursor, "cjdns", "cjdns", "cjdns", {
+ ipv6 = obj.ipv6,
+ public_key = obj.publicKey,
+ private_key = obj.privateKey,
+ admin_password = obj.admin.password,
+ admin_address = admin_address,
+ admin_port = admin_port
+ })
+
+ if obj.router.interface.tunDevice then
+ UCI.cursor_section(cursor, "cjdns", "cjdns", "cjdns", {
+ tun_device = tostring(obj.router.interface.tunDevice)
+ })
+ end
+
+ if obj.security then
+ for i,section in pairs(obj.security) do
+ for key,value in pairs(section) do
+ if key == "seccomp" then
+ UCI.cursor_section(cursor, "cjdns", "cjdns", "cjdns", {
+ seccomp = tonumber(value)
+ })
+ end
+ end
+ end
+ end
+
+ if obj.router.ipTunnel.outgoingConnections then
+ for i,public_key in pairs(obj.router.ipTunnel.outgoingConnections) do
+ UCI.cursor_section(cursor, "cjdns", "iptunnel_outgoing", nil, {
+ public_key = public_key
+ })
+ end
+ end
+
+ if obj.router.ipTunnel.allowedConnections then
+ for i,allowed in pairs(obj.router.ipTunnel.allowedConnections) do
+ entry = { public_key = allowed.publicKey }
+ if allowed.ip4Address then
+ entry["ipv4"] = allowed.ip4Address
+ end
+ if allowed.ip6Address then
+ entry["ipv6"] = allowed.ip6Address
+ end
+
+ UCI.cursor_section(cursor, "cjdns", "iptunnel_allowed", nil, entry)
+ end
+ end
+
+ if obj.interfaces.ETHInterface then
+ for i,interface in pairs(obj.interfaces.ETHInterface) do
+ UCI.cursor_section(cursor, "cjdns", "eth_interface", nil, {
+ bind = interface.bind,
+ beacon = tostring(interface.beacon)
+ })
+
+ if interface.connectTo then
+ for peer_address,peer in pairs(interface.connectTo) do
+ UCI.cursor_section(cursor, "cjdns", "eth_peer", nil, {
+ interface = i,
+ address = peer_address,
+ public_key = peer.publicKey,
+ password = peer.password
+ })
+ end
+ end
+ end
+ end
+
+ if obj.interfaces.UDPInterface then
+ for i,interface in pairs(obj.interfaces.UDPInterface) do
+ local address, port = string.match(interface.bind, "^(.*):(.*)$")
+ UCI.cursor_section(cursor, "cjdns", "udp_interface", nil, {
+ address = address,
+ port = port
+ })
+
+ if interface.connectTo then
+ for peer_bind,peer in pairs(interface.connectTo) do
+ local peer_address, peer_port = string.match(peer_bind, "^(.*):(.*)$")
+ UCI.cursor_section(cursor, "cjdns", "udp_peer", nil, {
+ interface = i,
+ address = peer_address,
+ port = peer_port,
+ user = peer.user,
+ public_key = peer.publicKey,
+ password = peer.password
+ })
+ end
+ end
+ end
+ end
+
+ if obj.authorizedPasswords then
+ for i,password in pairs(obj.authorizedPasswords) do
+ local user = password.user
+ if not user or string.len(user) == 0 then
+ user = "user-" .. UCI.random_string(6)
+ end
+
+ UCI.cursor_section(cursor, "cjdns", "password", nil, {
+ password = password.password,
+ user = user,
+ contact = password.contact
+ })
+ end
+ end
+
+ return cursor:save("cjdns")
+end
+
+--- Simple backport of Cursor:section from luci.model.uci
+--
+-- Backport reason: we don't wanna depend on LuCI.
+-- @param Cursor the UCI cursor to operate on
+-- @param string name of the config
+-- @param string type of the section
+-- @param string name of the section (optional)
+-- @param table config values
+function UCI.cursor_section(cursor, config, type, section, values)
+ if section then
+ cursor:set(config, section, type)
+ else
+ section = cursor:add("cjdns", type)
+ end
+
+ for k,v in pairs(values) do
+ cursor:set(config, section, k, v)
+ end
+end
+
+function UCI.makeInterface()
+ local cursor = uci.cursor()
+
+ local config = cursor:get_all("cjdns", "cjdns")
+ if not config then return nil end
+
+ return common.AdminInterface.new({
+ host = config.admin_address,
+ port = config.admin_port,
+ password = config.admin_password,
+ config = UCI.get(),
+ timeout = 2
+ })
+end
+
+function UCI.random_string(length)
+ -- tr -cd 'A-Za-z0-9' < /dev/urandom
+ local urandom = io.popen("tr -cd 'A-Za-z0-9' 2> /dev/null < /dev/urandom", "r")
+ local string = urandom:read(length)
+ urandom:close()
+ return string
+end