v1.0. Luaposix, multiple service instances.

2025-12-06 03:26:50 +03:00 · 2023-05-01 14:39:23 +03:00
parent 642265b96d
commit 76acd939a9
24 changed files with 1515 additions and 988 deletions
--- a/internet-detector/Makefile
+++ b/internet-detector/Makefile
@@ -1,11 +1,11 @@
 #
-# (с) 2021 gSpot (https://github.com/gSpotx2f/luci-app-internet-detector)
+# (с) 2023 gSpot (https://github.com/gSpotx2f/luci-app-internet-detector)
 #

 include $(TOPDIR)/rules.mk

 PKG_NAME:=internet-detector
-PKG_VERSION:=0.6
+PKG_VERSION:=1.0
 PKG_RELEASE:=0
 PKG_MAINTAINER:=gSpot <https://github.com/gSpotx2f/luci-app-internet-detector>

@@ -17,17 +17,19 @@ define Package/$(PKG_NAME)
  TITLE:=Internet detector
  URL:=https://github.com/gSpotx2f/luci-app-internet-detector
  PKGARCH:=all
-  DEPENDS:=+lua +luci-lib-nixio +libuci-lua
+  DEPENDS:=+lua +luaposix +libuci-lua
 endef

 define Package/$(PKG_NAME)/description
  Internet-detector is a small daemon
  for checking Internet availability.
-  Written in Lua using the nixio library.
+  Written in Lua using the luaposix library.
 endef

 define Package/$(PKG_NAME)/conffiles
 /etc/config/internet-detector
+/etc/internet-detector/down-script.internet
+/etc/internet-detector/up-script.internet
 endef

 define Build/Configure
@@ -40,8 +42,8 @@ define Package/$(PKG_NAME)/install
 	$(INSTALL_DIR) $(1)/etc/config
 	$(INSTALL_CONF) ./files/etc/config/internet-detector $(1)/etc/config/internet-detector
 	$(INSTALL_DIR) $(1)/etc/internet-detector
-	$(INSTALL_BIN) ./files/etc/internet-detector/down-script $(1)/etc/internet-detector/down-script
-	$(INSTALL_BIN) ./files/etc/internet-detector/up-script $(1)/etc/internet-detector/up-script
+	$(INSTALL_DATA) ./files/etc/internet-detector/down-script.internet $(1)/etc/internet-detector/down-script.internet
+	$(INSTALL_DATA) ./files/etc/internet-detector/up-script.internet $(1)/etc/internet-detector/up-script.internet
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/etc/init.d/internet-detector $(1)/etc/init.d/internet-detector
 	$(INSTALL_DIR) $(1)/usr/bin
--- a/internet-detector/files/etc/config/internet-detector
+++ b/internet-detector/files/etc/config/internet-detector
@@ -1,52 +1,48 @@
 config main 'config'
-	option mode '2'
+	option mode '1'
+	option enable_logger '1'
+
+config ui 'ui'
 	list hosts '8.8.8.8'
 	list hosts '1.1.1.1'
 	option check_type '0'
 	option tcp_port '53'
-	option ui_interval_up '6'
-	option ui_interval_down '1'
-	option ui_connection_attempts '1'
-	option ui_connection_timeout '1'
-	option service_interval_up '30'
-	option service_interval_down '5'
-	option service_connection_attempts '2'
-	option service_connection_timeout '2'
-	option service_enable_logger '1'
+	option interval_up '6'
+	option interval_down '1'
+	option connection_attempts '1'
+	option connection_timeout '1'

-config module 'mod_led_control'
-	option enabled '0'
-
-config module 'mod_reboot'
-	option enabled '0'
-	option dead_period '3600'
-	option force_reboot_delay '300'
-
-config module 'mod_network_restart'
-	option enabled '0'
-	option dead_period '900'
-	option attempts '1'
-	option restart_timeout '0'
-
-config module 'mod_modem_restart'
-	option enabled '0'
-	option dead_period '600'
-	option any_band '0'
-
-config module 'mod_public_ip'
-	option enabled '0'
-	option provider 'opendns1'
-	option interval '600'
-	option timeout '3'
-
-config module 'mod_email'
-	option enabled '0'
-	option alive_period '0'
-	option mail_smtp 'smtp.gmail.com'
-	option mail_smtp_port '587'
-	option mail_security 'tls'
-
-config module 'mod_user_scripts'
-	option enabled '0'
-	option alive_period '0'
-	option dead_period '0'
+config instance 'internet'
+	option enabled '1'
+	list hosts '8.8.8.8'
+	list hosts '1.1.1.1'
+	option check_type '0'
+	option tcp_port '53'
+	option interval_up '30'
+	option interval_down '5'
+	option connection_attempts '2'
+	option connection_timeout '2'
+	option mod_led_control_enabled '0'
+	option mod_reboot_enabled '0'
+	option mod_reboot_dead_period '3600'
+	option mod_reboot_force_reboot_delay '300'
+	option mod_network_restart_enabled '0'
+	option mod_network_restart_dead_period '900'
+	option mod_network_restart_attempts '1'
+	option mod_network_restart_restart_timeout '0'
+	option mod_modem_restart_enabled '0'
+	option mod_modem_restart_dead_period '600'
+	option mod_modem_restart_any_band '0'
+	option mod_public_ip_enabled '0'
+	option mod_public_ip_provider 'opendns1'
+	option mod_public_ip_qtype '0'
+	option mod_public_ip_interval '600'
+	option mod_public_ip_timeout '3'
+	option mod_email_enabled '0'
+	option mod_email_alive_period '0'
+	option mod_email_mail_smtp 'smtp.gmail.com'
+	option mod_email_mail_smtp_port '587'
+	option mod_email_mail_security 'tls'
+	option mod_user_scripts_enabled '0'
+	option mod_user_scripts_alive_period '0'
+	option mod_user_scripts_dead_period '0'
--- a/internet-detector/files/etc/init.d/internet-detector
+++ b/internet-detector/files/etc/init.d/internet-detector
@@ -3,17 +3,23 @@
 START=97
 STOP=01

-ID="/usr/bin/internet-detector"
+PROG=/usr/bin/internet-detector
+
+config_app() {
+	config_get enabled "$1" enabled "0"
+	if [ $enabled = "1" ]; then
+		$PROG service "$1"
+	fi
+}

 start() {
-	$ID
+	config_load internet-detector
+	config_get mode "config" mode "0"
+	if [ $mode = "1" ]; then
+		config_foreach config_app "instance"
+	fi
 }

 stop() {
-	$ID stop
-}
-
-restart() {
-	stop
-	start
+	$PROG stop
 }
--- a/internet-detector/files/etc/internet-detector/down-script.internet
+++ b/internet-detector/files/etc/internet-detector/down-script.internet
--- a/internet-detector/files/etc/internet-detector/up-script.internet
+++ b/internet-detector/files/etc/internet-detector/up-script.internet
--- a/internet-detector/files/usr/bin/internet-detector
+++ b/internet-detector/files/usr/bin/internet-detector
@@ -5,112 +5,103 @@

 	Dependences:
 		lua
-		luci-lib-nixio
+		luaposix
 		libuci-lua

-	(с) 2021 gSpot (https://github.com/gSpotx2f/luci-app-internet-detector)
+	(с) 2023 gSpot (https://github.com/gSpotx2f/luci-app-internet-detector)
 --]]

-- Default settings
-
-local Config = {
-	mode                 = 2,
-	enableLogger         = true,
-	intervalUp           = 30,
-	intervalDown         = 5,
-	connectionAttempts   = 2,
-	connectionTimeout    = 2,
-	UIConnectionAttempts = 1,
-	UIConnectionTimeout  = 1,
-	hosts                = {
-		[1] = "8.8.8.8",
-		[2] = "1.1.1.1",
-	},
-	tcpPort              = 53,
-	pingPacketSize       = 56,
-	iface                = nil,
-	checkType            = 0,	-- 0: TCP, 1: ping
-	hostname             = "OpenWrt",
-	appName              = "internet-detector",
-	commonDir            = "/tmp/run",
-	debugLog             = "/tmp/internet-detector.debug",
-	pingCmd              = "/bin/ping",
-	pingParams           = "-c 1",
-	debug                = false,
-	modules              = {},
-	parsedHosts          = {},
-}
-Config.configDir  = string.format("/etc/%s", Config.appName)
-Config.modulesDir = string.format("/usr/lib/%s", Config.appName)
-Config.pidFile    = string.format("%s/%s.pid", Config.commonDir, Config.appName)
-Config.statusFile = string.format("%s/%s.status", Config.commonDir, Config.appName)
-
 -- Importing packages

-local function prequire(package)
+local dirent = require("posix.dirent")
+local fcntl  = require("posix.fcntl")
+local signal = require("posix.signal")
+local socket = require("posix.sys.socket")
+local stat   = require("posix.sys.stat")
+local syslog = require("posix.syslog")
+local time   = require("posix.time")
+local unistd = require("posix.unistd")
+local uci    = require("uci")
+
+-- Default settings
+
+local InternetDetector = {
+	mode          = 0,
+	enableLogger  = true,
+	hostname      = "OpenWrt",
+	appName       = "internet-detector",
+	commonDir     = "/tmp/run",
+	pingCmd       = "/bin/ping",
+	pingParams    = "-c 1",
+	debug         = false,
+	serviceConfig = {
+		hosts = {
+			[1] = "8.8.8.8",
+			[2] = "1.1.1.1",
+		},
+		check_type          = 0,	-- 0: TCP, 1: ICMP
+		tcp_port            = 53,
+		icmp_packet_size    = 56,
+		interval_up         = 30,
+		interval_down       = 5,
+		connection_attempts = 2,
+		connection_timeout  = 2,
+		iface               = nil,
+		instance            = nil,
+	},
+	modules      = {},
+	parsedHosts  = {},
+}
+InternetDetector.configDir  = string.format("/etc/%s", InternetDetector.appName)
+InternetDetector.modulesDir = string.format("/usr/lib/%s", InternetDetector.appName)
+
+-- Loading settings from UCI
+local uciCursor               = uci.cursor()
+InternetDetector.mode         = tonumber(
+	uciCursor:get(InternetDetector.appName, "config", "mode"))
+InternetDetector.enableLogger = (tonumber(
+	uciCursor:get(InternetDetector.appName, "config", "enable_logger")) ~= 0)
+local hostname                = uciCursor:get("system", "@[0]", "hostname")
+if hostname ~= nil then
+	InternetDetector.hostname = hostname
+end
+
+local RUNNING
+
+function InternetDetector:prequire(package)
 	local retVal, pkg = pcall(require, package)
 	return retVal and pkg
 end

-local nixio = prequire("nixio")
-if not nixio then
-	error("You need to install nixio...")
+function InternetDetector:loadUCIConfig(sType, instance)
+	local success
+	local num = 0
+	uciCursor:foreach(
+		self.appName,
+		sType,
+		function(s)
+			if s[".name"] == instance then
+				for k, v in pairs(s) do
+					if type(v) == "string" and v:match("^[%d]+$") then
+						v = tonumber(v)
+					end
+					self.serviceConfig[k] = v
+				end
+				success = true
+				self.serviceConfig.instanceNum = num
+			end
+			num = num + 1
+		end
+	)
+	self.serviceConfig.instance = instance
+	self.pidFile    = string.format(
+		"%s/%s.%s.pid", self.commonDir, self.appName, instance)
+	self.statusFile = string.format(
+		"%s/%s.%s.status", self.commonDir, self.appName, instance)
+	return success
 end

-local uci = prequire("uci")
-if not uci then
-	error("You need to install libuci-lua...")
-end
-
-- Loading settings from UCI
-
-local uciCursor             = uci.cursor()
-Config.mode                 = tonumber(uciCursor:get(
-                               Config.appName, "config", "mode"))
-Config.enableLogger         = (tonumber(uciCursor:get(
-                               Config.appName, "config", "service_enable_logger")) ~= 0)
-Config.intervalUp           = tonumber(uciCursor:get(
-                               Config.appName, "config", "service_interval_up"))
-Config.intervalDown         = tonumber(uciCursor:get(
-                               Config.appName, "config", "service_interval_down"))
-Config.connectionAttempts   = tonumber(uciCursor:get(
-                               Config.appName, "config", "service_connection_attempts"))
-Config.connectionTimeout    = tonumber(uciCursor:get(
-                               Config.appName, "config", "service_connection_timeout"))
-Config.UIConnectionAttempts = tonumber(uciCursor:get(
-                               Config.appName, "config", "ui_connection_attempts"))
-Config.UIConnectionTimeout  = tonumber(uciCursor:get(
-                               Config.appName, "config", "ui_connection_timeout"))
-Config.hosts                = uciCursor:get(Config.appName, "config", "hosts")
-
-local tcpPort               = uciCursor:get(
-                               Config.appName, "config", "tcp_port")
-if tcpPort ~= nil then
-	Config.tcpPort = tonumber(tcpPort)
-end
-
-local pingPacketSize        = uciCursor:get(
-                               Config.appName, "config", "ping_packet_size")
-if pingPacketSize ~= nil then
-	Config.pingPacketSize = tonumber(pingPacketSize)
-end
-
-local iface                 = uciCursor:get(
-                               Config.appName, "config", "iface")
-if iface ~= nil then
-	Config.iface = iface
-end
-
-Config.checkType            = tonumber(uciCursor:get(
-                               Config.appName, "config", "check_type"))
-
-local hostname              = uciCursor:get("system", "@[0]", "hostname")
-if hostname ~= nil then
-	Config.hostname = hostname
-end
-
-
-local function writeValueToFile(filePath, str)
+function InternetDetector:writeValueToFile(filePath, str)
 	local retValue = false
 	local fh       = io.open(filePath, "w")
 	if fh then
@@ -122,7 +113,7 @@ local function writeValueToFile(filePath, str)
 	return retValue
 end

-local function readValueFromFile(filePath)
+function InternetDetector:readValueFromFile(filePath)
 	local retValue
 	local fh = io.open(filePath, "r")
 	if fh then
@@ -132,72 +123,97 @@ local function readValueFromFile(filePath)
 	return retValue
 end

-local function statusJson(inet, t)
-	local lines = { [1] = string.format('"inet":%d', inet) }
+function InternetDetector:statusJson(inet, instance, t)
+	local lines = { [1] = string.format(
+		'{"instance":"%s","num":"%d","inet":%d',
+		instance,
+		self.serviceConfig.instanceNum,
+		inet)}
 	if t then
 		for k, v in pairs(t) do
 			lines[#lines + 1] = string.format('"%s":"%s"', k, v)
 		end
 	end
-	return "{" .. table.concat(lines, ",") .. "}"
+	return table.concat(lines, ",") .. "}"
 end

-local function writeLogMessage(level, msg)
-	if Config.enableLogger then
-		nixio.syslog(level, msg)
+function InternetDetector:writeLogMessage(level, msg)
+	if self.enableLogger then
+		local levels = {
+			emerg   = syslog.LOG_EMERG,
+			alert   = syslog.LOG_ALERT,
+			crit    = syslog.LOG_CRIT,
+			err     = syslog.LOG_ERR,
+			warning = syslog.LOG_WARNING,
+			notice  = syslog.LOG_NOTICE,
+			info    = syslog.LOG_INFO,
+			debug   = syslog.LOG_DEBUG,
+		}
+		syslog.syslog(levels[level] or syslog.LOG_INFO, string.format(
+			"%s: %s", self.serviceConfig.instance or "", msg))
 	end
 end

-local function loadModules()
-	package.path   = string.format("%s;%s/?.lua", package.path, Config.modulesDir)
-	Config.modules = {}
-	uciCursor:foreach(
-		Config.appName,
-		"module",
-		function(s)
-			local mod_name = s[".name"]
-			if mod_name and s.enabled == "1" then
-				local m = prequire(mod_name)
-				if m then
-					m.config     = Config
-					m.syslog     = writeLogMessage
-					m.writeValue = writeValueToFile
-					m.readValue  = readValueFromFile
-					m:init(s)
-					Config.modules[#Config.modules + 1] = m
+function InternetDetector:loadModules()
+	package.path = string.format("%s;%s/?.lua", package.path, self.modulesDir)
+	self.modules = {}
+	local ok, modulesDir = pcall(dirent.files, self.modulesDir)
+	if ok then
+		for item in modulesDir do
+			if item:match("^mod_") then
+				local modName   = item:gsub("%.lua$", "")
+				local modConfig = {}
+				for k, v in pairs(self.serviceConfig) do
+					if k:match("^" .. modName) then
+						modConfig[k:gsub("^" .. modName .. "_", "")] = v
+					end
+				end
+				if modConfig.enabled == 1 then
+					local m = self:prequire(modName)
+					if m then
+						m.config     = self
+						m.syslog     = function(level, msg) self:writeLogMessage(level, msg) end
+						m.writeValue = function(filePath, str) return self:writeValueToFile(filePath, str) end
+						m.readValue  = function(filePath) return self:readValueFromFile(filePath) end
+						m:init(modConfig)
+						self.modules[#self.modules + 1] = m
+					end
 				end
 			end
 		end
-	)
-end
-
-local function parseHost(host)
-	local addr, port = host:match("^([^:]+):?(%d*)")
-	return addr, tonumber(port) or false
-end
-
-local function parseHosts()
-	Config.parsedHosts = {}
-	for k, v in ipairs(Config.hosts) do
-		local addr, port = parseHost(v)
-		Config.parsedHosts[k] = { addr = addr, port = port }
 	end
 end

-local function pingHost(host)
+function InternetDetector:parseHost(host)
+	local addr, port = host:match("^([^%[%]:]+):?(%d?%d?%d?%d?%d?)$")
+	if not addr then
+		addr, port = host:match("^%[?([^%[%]]+)%]?:?(%d?%d?%d?%d?%d?)$")
+	end
+	return addr, tonumber(port)
+end
+
+function InternetDetector:parseHosts()
+	self.parsedHosts = {}
+	for k, v in ipairs(self.serviceConfig.hosts) do
+		local addr, port    = self:parseHost(v)
+		self.parsedHosts[k] = { addr = addr, port = port }
+	end
+end
+
+function InternetDetector:pingHost(host)
 	local ping = string.format(
 		"%s %s -W %d -s %d%s %s > /dev/null 2>&1",
-		Config.pingCmd,
-		Config.pingParams,
-		Config.connectionTimeout,
-		Config.pingPacketSize,
-		Config.iface and (" -I " .. Config.iface) or "",
+		self.pingCmd,
+		self.pingParams,
+		self.serviceConfig.connection_timeout,
+		self.serviceConfig.icmp_packet_size,
+		self.serviceConfig.iface and (" -I " .. self.serviceConfig.iface) or "",
 		host
 	)
 	local retCode = os.execute(ping)

 	-- Debug
-	if Config.debug then
+	if self.debug then
 		io.stdout:write(string.format(
 			"--- Ping ---\ntime = %s\n%s\nretCode = %s\n", os.time(), ping, retCode)
 		)
@@ -207,53 +223,94 @@ local function pingHost(host)
 	return retCode
 end

-local function TCPConnectionToHost(host, port)
-	local retCode  = 1
-	local addrInfo = nixio.getaddrinfo(host, "any")
-	if addrInfo then
-		local family = addrInfo[1].family
-		if family then
-			local socket = nixio.socket(family, "stream")
-			socket:setopt("socket", "sndtimeo", Config.connectionTimeout)
-			socket:setopt("socket", "rcvtimeo", Config.connectionTimeout)
-			if Config.iface then
-				socket:setopt("socket", "bindtodevice", Config.iface)
-			end
-			local success = socket:connect(host, port or Config.tcpPort)
+function InternetDetector:TCPConnectionToHost(host, port)
+	local retCode = 1
+	local saTable, errMsg, errNum = socket.getaddrinfo(host, port or self.serviceConfig.tcp_port)

-			-- Debug
-			if Config.debug then
-				local sockAddr, sockPort = socket:getsockname()
-				local peerAddr, peerPort = socket:getpeername()
+	if not saTable then
+		if self.debug then
+			io.stdout:write(string.format(
+				"GETADDRINFO ERROR: %s, %s\n", errMsg, errNum))
+		end
+	else
+		local family = saTable[1].family
+
+		if family then
+			local sock, errMsg, errNum = socket.socket(family, socket.SOCK_STREAM, 0)
+
+			if not sock then
+				if self.debug then
+					io.stdout:write(string.format(
+						"SOCKET ERROR: %s, %s\n", errMsg, errNum))
+				end
+				return retCode
+			end
+
+			socket.setsockopt(sock, socket.SOL_SOCKET,
+				socket.SO_SNDTIMEO, self.serviceConfig.connection_timeout, 0)
+			socket.setsockopt(sock, socket.SOL_SOCKET,
+				socket.SO_RCVTIMEO, self.serviceConfig.connection_timeout, 0)
+
+			if self.serviceConfig.iface then
+				local ok, errMsg, errNum = socket.setsockopt(sock, socket.SOL_SOCKET,
+					socket.SO_BINDTODEVICE, self.serviceConfig.iface)
+				if not ok then
+					if self.debug then
+						io.stdout:write(string.format(
+							"SOCKET ERROR: %s, %s\n", errMsg, errNum))
+					end
+					return retCode
+				end
+			end
+
+			local success = socket.connect(sock, saTable[1])
+
+			if self.debug then
+				if not success then
+					io.stdout:write(string.format(
+						"SOCKET CONNECT ERROR: %s\n", tostring(success)))
+				end
+				local sockTable, err_s, e_s = socket.getsockname(sock)
+				local peerTable, err_p, e_p = socket.getpeername(sock)
+				if not sockTable then
+					sockTable = {}
+					io.stdout:write(
+						string.format("SOCKET ERROR: %s, %s\n", err_s, e_s))
+				end
+				if not peerTable then
+					peerTable = {}
+					io.stdout:write(
+						string.format("SOCKET ERROR: %s, %s\n", err_p, e_p))
+				end
 				io.stdout:write(string.format(
-					"--- TCP ---\ntime = %s\nconnectionTimeout = %s\niface = %s\nhost:port = %s:%s\nsockname = %s:%s\npeername = %s:%s\nsuccess = %s\n",
+					"--- TCP ---\ntime = %s\nconnection_timeout = %s\niface = %s\nhost:port = [%s]:%s\nsockname = [%s]:%s\npeername = [%s]:%s\nsuccess = %s\n",
 					os.time(),
-					Config.connectionTimeout,
-					tostring(Config.iface),
+					self.serviceConfig.connection_timeout,
+					tostring(self.serviceConfig.iface),
 					host,
-					port or Config.tcpPort,
-					tostring(sockAddr),
-					tostring(sockPort),
-					tostring(peerAddr),
-					tostring(peerPort),
+					port or self.serviceConfig.tcp_port,
+					tostring(sockTable.addr),
+					tostring(sockTable.port),
+					tostring(peerTable.addr),
+					tostring(peerTable.port),
 					tostring(success))
 				)
 				io.stdout:flush()
 			end

-			socket:close()
+			unistd.close(sock)
 			retCode = success and 0 or 1
 		end
 	end
 	return retCode
 end

-local function checkHosts()
-	local checkFunc = (Config.checkType == 1) and pingHost or TCPConnectionToHost
+function InternetDetector:checkHosts()
+	local checkFunc = (self.serviceConfig.check_type == 1) and self.pingHost or self.TCPConnectionToHost
 	local retCode   = 1
-	for k, v in ipairs(Config.parsedHosts) do
-		for i = 1, Config.connectionAttempts do
-			if checkFunc(v.addr, v.port) == 0 then
+	for k, v in ipairs(self.parsedHosts) do
+		for i = 1, self.serviceConfig.connection_attempts do
+			if checkFunc(self, v.addr, v.port) == 0 then
 				retCode = 0
 				break
 			end
@@ -265,37 +322,51 @@ local function checkHosts()
 	return retCode
 end

-local function main()
-	local lastStatus, currentStatus, timeNow, timeDiff, lastTime
-	local interval = Config.intervalUp
-	local counter  = 0
+function InternetDetector:breakMain(signo)
+	RUNNING = false
+end

-	while true do
+function InternetDetector:main()
+	signal.signal(signal.SIGTERM, function(signo) self:breakMain(signo) end)
+	signal.signal(signal.SIGINT, function(signo) self:breakMain(signo) end)
+	signal.signal(signal.SIGQUIT, function(signo) self:breakMain(signo) end)
+
+	local lastStatus, currentStatus, timeNow, timeDiff, lastTime
+	local interval = self.serviceConfig.interval_up
+	local counter  = 0
+	local onStart  = true
+	RUNNING        = true
+	while RUNNING do
 		if counter == 0 or counter >= interval then
-			currentStatus = checkHosts()
-			if not nixio.fs.access(Config.statusFile, "r") then
-				writeValueToFile(Config.statusFile, statusJson(currentStatus))
+			currentStatus = self:checkHosts()
+			if onStart or not stat.stat(self.statusFile) then
+				self:writeValueToFile(self.statusFile, self:statusJson(
+					currentStatus, self.serviceConfig.instance))
+				onStart = false
 			end

 			if currentStatus == 0 then
-				interval = Config.intervalUp
+				interval = self.serviceConfig.interval_up
 				if lastStatus ~= nil and currentStatus ~= lastStatus then
-					writeValueToFile(Config.statusFile, statusJson(currentStatus))
-					writeLogMessage("notice", "Internet connected")
+					self:writeValueToFile(self.statusFile, self:statusJson(
+						currentStatus, self.serviceConfig.instance))
+					self:writeLogMessage("notice", "Connected")
 				end
 			else
-				interval = Config.intervalDown
+				interval = self.serviceConfig.interval_down
 				if lastStatus ~= nil and currentStatus ~= lastStatus then
-					writeValueToFile(Config.statusFile, statusJson(currentStatus))
-					writeLogMessage("notice", "Internet disconnected")
+					self:writeValueToFile(self.statusFile, self:statusJson(
+						currentStatus, self.serviceConfig.instance))
+					self:writeLogMessage("notice", "Disconnected")
 				end
 			end
+
 			counter = 0
 		end

 		timeDiff = 0
-		for _, e in ipairs(Config.modules) do
-			timeNow = nixio.sysinfo().uptime
+		for _, e in ipairs(self.modules) do
+			timeNow = time.clock_gettime(time.CLOCK_MONOTONIC).tv_sec
 			if lastTime then
 				timeDiff = timeDiff + timeNow - lastTime
 			else
@@ -306,142 +377,156 @@ local function main()
 		end

 		local modulesStatus = {}
-		for k, v in ipairs(Config.modules) do
+		for k, v in ipairs(self.modules) do
 			if v.status ~= nil then
 				modulesStatus[v.name] = v.status
 			end
 		end
 		if next(modulesStatus) then
-			writeValueToFile(Config.statusFile, statusJson(currentStatus, modulesStatus))
+			self:writeValueToFile(self.statusFile, self:statusJson(
+				currentStatus, self.serviceConfig.instance, modulesStatus))
 		end

 		lastStatus = currentStatus
-		nixio.nanosleep(1)
+		unistd.sleep(1)
 		counter    = counter + 1
 	end
 end

-local function removeProcessFiles()
-	os.remove(Config.pidFile)
-	os.remove(Config.statusFile)
+function InternetDetector:removeProcessFiles()
+	os.remove(string.format(
+		"%s/%s.%s.pid", self.commonDir, self.appName, self.serviceConfig.instance))
+	os.remove(string.format(
+		"%s/%s.%s.status", self.commonDir, self.appName, self.serviceConfig.instance))
 end

-local function status()
-	if nixio.fs.access(Config.pidFile, "r") then
-		return "running"
-	else
-		return "stoped"
-	end
-end
-
-local function poll(attempts, timeout)
-	if Config.mode == 1 then
-		Config.connectionAttempts = Config.UIConnectionAttempts
-		Config.connectionTimeout  = Config.UIConnectionTimeout
-	end
-	if attempts then
-		Config.connectionAttempts = attempts
-	end
-	if timeout then
-		Config.connectionTimeout = timeout
-	end
-	if checkHosts() == 0 then
-		return statusJson(0)
-	else
-		return  statusJson(1)
-	end
-end
-
-local function inetStatus(json)
-	local inetStat = 1
-	if nixio.fs.access(Config.statusFile, "r") then
-		local inetStatVal = readValueFromFile(Config.statusFile)
-		inetStat = inetStatVal
-	elseif Config.mode == 1 then
-		inetStat = poll()
-	else
-		os.exit(126)
-	end
-	if not json then
-		local sVal = inetStat:match('"inet":[0-9]')
-		if sVal then
-			sVal = sVal:match("[0-9]")
-			inetStat = (tonumber(sVal) == 0) and "up" or "down"
+function InternetDetector:status()
+	local ok, commonDir = pcall(dirent.files, self.commonDir)
+	if ok then
+		local appName = self.appName:gsub("-", "%%-")
+		for item in commonDir do
+			if item:match("^" .. appName .. ".-%.pid$") then
+				return "running"
+			end
 		end
 	end
+	return "stoped"
+end
+
+function InternetDetector:poll()
+	local retCode = self:checkHosts()
+	return string.format('{"instances":[%s]}', self:statusJson(
+		retCode, self.serviceConfig.instance))
+end
+
+function InternetDetector:inetStatus()
+	local inetStat      = '{"instances":[]}'
+	local ok, commonDir = pcall(dirent.files, self.commonDir)
+	if ok then
+		local appName = self.appName:gsub("-", "%%-")
+		local lines   = {}
+		for item in commonDir do
+			if item:match("^" .. appName .. ".-%.status$") then
+				lines[#lines + 1] = self:readValueFromFile(
+					string.format("%s/%s", self.commonDir, item))
+			end
+		end
+		inetStat = '{"instances":[' .. table.concat(lines, ",") .. "]}"
+	end
 	return inetStat
 end

-local function stop()
-	local pidValue
-	if Config.enableLogger then
-		nixio.openlog(Config.appName)
-	end
-	if nixio.fs.access(Config.pidFile, "r") then
-		pidValue = readValueFromFile(Config.pidFile)
+function InternetDetector:stopInstance(pidFile)
+	local retVal
+	if stat.stat(pidFile) then
+		pidValue = self:readValueFromFile(pidFile)
 		if pidValue then
-			local success
+			local ok, errMsg, errNum
 			for i = 0, 10 do
-				success = nixio.kill(tonumber(pidValue), 15)
-				if success then
+				ok, errMsg, errNum = signal.kill(tonumber(pidValue), signal.SIGTERM)
+				if ok then
 					break
 				end
 			end
-			if not success then
-				io.stderr:write(string.format('No such process: "%s"\n', pidValue))
+			if not ok then
+				io.stderr:write(string.format(
+					'Process stop error: %s (%s). PID: "%s"\n', errMsg, errNum, pidValue))
 			end
-			writeLogMessage("info", string.format("[%s] stoped", pidValue))
-			removeProcessFiles()
+			if errNum == 3 then
+				os.remove(pidFile)
+			end
+			retVal = true
 		end
 	end
 	if not pidValue then
 		io.stderr:write(
 			string.format('PID file "%s" does not exist. %s not running?\n',
-				Config.pidFile, Config.appName))
-	end
-	if Config.enableLogger then
-		nixio.closelog()
+				pidFile, self.appName))
 	end
+	return retVal
 end

-local function preRun()
-	-- Exit if internet-detector mode != 2(Service)
-	if Config.mode ~= 2 then
-		io.stderr:write(string.format('Start failed, mode != 2\n', Config.appName))
+function InternetDetector:stop()
+	local appName = self.appName:gsub("-", "%%-")
+	local success
+	for i = 0, 10 do
+		success = true
+		local ok, commonDir = pcall(dirent.files, self.commonDir)
+		if ok then
+			for item in commonDir do
+				if item:match("^" .. appName .. ".-%.pid$") then
+					self:stopInstance(string.format("%s/%s", self.commonDir, item))
+					success = false
+				end
+			end
+			if success then
+				break
+			end
+			unistd.sleep(1)
+		else
+			break
+		end
+	end
+
+end
+
+function InternetDetector:preRun()
+	-- Exit if internet-detector mode != 1(Service)
+	if self.mode ~= 1 then
+		io.stderr:write(string.format('Start failed, mode != 1\n', self.appName))
 		os.exit(0)
 	end
-	if nixio.fs.access(Config.pidFile, "r") then
+	if stat.stat(self.pidFile) then
 		io.stderr:write(
 			string.format('PID file "%s" already exist. %s already running?\n',
-				Config.pidFile, Config.appName))
+				self.pidFile, self.appName))
 		return false
 	end
 	return true
 end

-local function run()
-	local pidValue = nixio.getpid()
-	writeValueToFile(Config.pidFile, pidValue)
-	if Config.enableLogger then
-		nixio.openlog(Config.appName, "pid")
+function InternetDetector:run()
+	local pidValue = unistd.getpid()
+	self:writeValueToFile(self.pidFile, pidValue)
+	if self.enableLogger then
+		syslog.openlog(self.appName, syslog.LOG_PID, syslog.LOG_DAEMON)
 	end
-	writeLogMessage("info", "started")
-	loadModules()
+	self:writeLogMessage("info", "started")
+	self:loadModules()

 	-- Loaded modules
 	local modules = {}
-	for _, v in ipairs(Config.modules) do
+	for _, v in ipairs(self.modules) do
 		modules[#modules + 1] = string.format("%s", v.name)
 	end
 	if #modules > 0 then
-		writeLogMessage(
+		self:writeLogMessage(
 			"info", string.format("Loaded modules: %s", table.concat(modules, ", "))
 		)
 	end

 	-- Debug
-	if Config.debug then
-
+	if self.debug then
 		local function inspectTable()
 			local tables = {}, f
 			f = function(t, prefix)
@@ -459,92 +544,125 @@ local function run()
 		end

 		io.stdout:write("--- Config ---\n")
-		inspectTable()(Config, "Config.")
+		inspectTable()(self, "self.")
 		io.stdout:flush()
 	end

-	main()
-	if Config.enableLogger then
-		nixio.closelog()
+	self:writeValueToFile(
+		self.statusFile, self:statusJson(-1, self.serviceConfig.instance))
+
+	self:main()
+
+	self:removeProcessFiles()
+	if self.enableLogger then
+		self:writeLogMessage("info", "stoped")
+		syslog.closelog()
 	end
 end

-local function noDaemon()
-	if not preRun() then
+function InternetDetector:noDaemon()
+	if not self:preRun() then
 		return
 	end
-	run()
+	self:run()
 end

-local function daemon(debug)
-	if not preRun() then
+function InternetDetector:daemon()
+	if not self:preRun() then
 		return
 	end
 	-- UNIX double fork
-	if nixio.fork() == 0 then
-		nixio.setsid()
-		if nixio.fork() == 0 then
-			nixio.chdir("/")
-			nixio.umask(0)
-			local output = "/dev/null"
-			if debug then
-				output       = Config.debugLog
-				Config.debug = true
-			end
+	if unistd.fork() == 0 then
+		unistd.setpid("s")
+		if unistd.fork() == 0 then
+			unistd.chdir("/")
+			stat.umask(0)
+			local devnull = fcntl.open("/dev/null", fcntl.O_RDWR)
 			io.stdout:flush()
 			io.stderr:flush()
-			nixio.dup(io.open("/dev/null", "r"), io.stdin)
-			nixio.dup(io.open(output, "a+"), io.stdout)
-			nixio.dup(io.open(output, "a+"), io.stderr)
-			run()
+			unistd.dup2(devnull, 0)	-- io.stdin
+			unistd.dup2(devnull, 1)	-- io.stdout
+			unistd.dup2(devnull, 2)	-- io.stderr
+			self:run()
+			unistd.close(devnull)
 		end
 		os.exit(0)
 	end
 	os.exit(0)
 end

-local function restart()
-	stop()
-	daemon()
+function InternetDetector:setServiceConfig(instance)
+	if self:loadUCIConfig("instance", instance) then
+		self:parseHosts()
+		return true
+	end
 end

 -- Main section

-parseHosts()
-
 local function help()
 	return string.format(
-		"Usage: %s [start|stop|restart|no-daemon|debug|status|inet-status|inet-status-json|poll [<attempts num>] [<timeout sec>]|--help]",
+		"Usage: %s service <UCI instance> | nodaemon <UCI instance> | debug <UCI instance> | stop | status | inet-status | poll [<attempts num>] [<timeout sec>] | --help",
 		arg[0]
 	)
 end

 local helpArgs = { ["-h"] = true, ["--help"] = true, ["help"] = true }
-if arg[1] == "start" or #arg == 0 then
-	daemon()
-elseif arg[1] == "no-daemon" then
-	noDaemon()
-elseif arg[1] == "debug" then
-	daemon(true)
-elseif arg[1] == "stop" then
-	stop()
-elseif arg[1] == "restart" then
-	restart()
-elseif arg[1] == "status" then
-	print(status())
-elseif arg[1] == "inet-status" then
-	print(inetStatus())
-elseif arg[1] == "inet-status-json" then
-	print(inetStatus(true))
-elseif arg[1] == "poll" then
-	local attempts, timeout
-	if arg[2] and arg[2]:match("[0-9]+") then
-		attempts = tonumber(arg[2])
-		if arg[3] and arg[3]:match("[0-9]+") then
-			timeout = tonumber(arg[3])
+if arg[1] == "service" then
+	if arg[2] then
+		if InternetDetector:setServiceConfig(arg[2]) then
+			InternetDetector:daemon()
+		else
+			os.exit(126)
 		end
+	else
+		print(help())
+		os.exit(1)
+	end
+elseif arg[1] == "nodaemon" then
+	if arg[2] then
+		if InternetDetector:setServiceConfig(arg[2]) then
+			InternetDetector:noDaemon()
+		else
+			os.exit(126)
+		end
+	else
+		print(help())
+		os.exit(1)
+	end
+elseif arg[1] == "debug" then
+	if arg[2] then
+		if InternetDetector:setServiceConfig(arg[2]) then
+			InternetDetector.debug = true
+			InternetDetector:noDaemon()
+		else
+			os.exit(126)
+		end
+	else
+		print(help())
+		os.exit(1)
+	end
+elseif arg[1] == "stop" then
+	InternetDetector:stop()
+elseif arg[1] == "status" then
+	print(InternetDetector:status())
+elseif arg[1] == "inet-status" then
+	print(InternetDetector:inetStatus())
+elseif arg[1] == "poll" then
+	if InternetDetector:loadUCIConfig("ui", "ui") then
+		InternetDetector:parseHosts()
+
+		if arg[2] and arg[2]:match("[0-9]+") then
+			InternetDetector.serviceConfig.connection_attempts = tonumber(arg[2])
+			if arg[3] and arg[3]:match("[0-9]+") then
+				InternetDetector.serviceConfig.connection_timeout = tonumber(arg[3])
+			end
+		end
+
+		print(InternetDetector:poll())
+	else
+		os.exit(126)
 	end
-	print(poll(attempts, timeout))
 elseif helpArgs[arg[1]] then
 	print(help())
 else
--- a/internet-detector/files/usr/lib/internet-detector/mod_email.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_email.lua
@@ -2,11 +2,13 @@
 	Dependences:
 		mailsend
 --]]
-local nixio  = require("nixio")
+local unistd = require("posix.unistd")

 local Module = {
 	name               = "mod_email",
-	config             = {},
+	config             = {
+		debug = false,
+	},
 	syslog             = function(level, msg) return true end,
 	writeValue         = function(filePath, str) return false end,
 	readValue          = function(filePath) return nil end,
@@ -45,7 +47,7 @@ function Module:init(t)
 	self.mailSmtpPort  = t.mail_smtp_port
 	self.mailSecurity  = t.mail_security

-	if nixio.fs.access(self.mta, "x") then
+	if unistd.access(self.mta, "x") then
 		self._enabled = true
 	else
 		self._enabled = false
@@ -66,16 +68,19 @@ end

 function Module:sendMessage(msg)
 	local verboseArg = ""
+
 	-- Debug
 	if self.config.debug then
 		verboseArg = " -v"
-		io.stdout:write("--- mod_email ---\n")
+		io.stdout:write(string.format("--- %s ---\n", self.name))
 		io.stdout:flush()
 	end
+
 	local securityArgs = "-starttls -auth-login"
 	if self.mailSecurity == "ssl" then
 		securityArgs = "-ssl -auth"
 	end
+
 	local mtaCmd = string.format(
 		'%s%s %s -smtp "%s" -port %s -cs utf-8 -user "%s" -pass "%s" -f "%s" -t "%s" -sub "%s" -M "%s"',
 		self.mta, verboseArg, securityArgs, self.mailSmtp, self.mailSmtpPort,
@@ -102,12 +107,14 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 		self._msgSent        = false
 		self._lastConnection = nil
 		if not self._disconnected then
-			self._disconnected      = true
+			self._disconnected = true
 			if not self._lastDisconnection then
 				self._lastDisconnection = os.date("%Y.%m.%d %H:%M:%S", os.time())
 			end
 		end
+
 	else
+
 		if not self._msgSent then

 			if not self._lastConnection then
--- a/internet-detector/files/usr/lib/internet-detector/mod_led_control.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_led_control.lua
@@ -1,5 +1,6 @@

-local nixio  = require("nixio")
+local unistd = require("posix.unistd")
+local dirent = require("posix.dirent")

 local Module = {
 	name                  = "mod_led_control",
@@ -20,13 +21,13 @@ local Module = {
 }

 function Module:resetLeds()
-	local dir = nixio.fs.dir(self.sysLedsDir)
-	if not dir then
+	local ok, dir = pcall(dirent.files, self.sysLedsDir)
+	if not ok then
 		return
 	end
 	for led in dir do
 		local brightness = string.format("%s/%s/brightness", self.sysLedsDir, led)
-		if nixio.fs.access(brightness, "w") then
+		if unistd.access(brightness, "w") then
 			self.writeValue(brightness, 0)
 		end
 	end
@@ -41,10 +42,11 @@ function Module:init(t)
 	self._ledMaxBrightnessFile = string.format("%s/max_brightness", self._ledDir)
 	self._ledBrightnessFile    = string.format("%s/brightness", self._ledDir)
 	self._ledMaxBrightness     = self.readValue(self._ledMaxBrightnessFile) or 1
-	if (not nixio.fs.access(self._ledDir, "r") or
-	    not nixio.fs.access(self._ledBrightnessFile, "r", "w")) then
+	if (not unistd.access(self._ledDir, "r") or
+	    not unistd.access(self._ledBrightnessFile, "rw")) then
 		self._enabled = false
-		self.syslog("warning", string.format("%s: LED '%s' is not available", self.name, self.ledName))
+		self.syslog("warning", string.format(
+			"%s: LED '%s' is not available", self.name, self.ledName))
 	else
 		self._enabled = true
 		-- Reset all LEDs
@@ -85,6 +87,7 @@ function Module:run(currentStatus, lastStatus, timeDiff)

 		self._counter = 0
 	end
+
 	self._counter = self._counter + timeDiff
 end

--- a/internet-detector/files/usr/lib/internet-detector/mod_modem_restart.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_modem_restart.lua
@@ -2,7 +2,7 @@
 	Dependences:
 		modemmanager
 --]]
-local nixio  = require("nixio")
+local unistd = require("posix.unistd")

 local Module = {
 	name         = "mod_modem_restart",
@@ -50,11 +50,11 @@ function Module:init(t)
 	self.iface      = t.iface
 	self.anyBand    = (tonumber(t.any_band) ~= 0)

-	if not nixio.fs.access(self.mmcli, "x") then
+	if not unistd.access(self.mmcli, "x") then
 		self.anyBand = false
 	end

-	if nixio.fs.access(self.mmInit, "x") then
+	if unistd.access(self.mmInit, "x") then
 		self._enabled = true
 	else
 		self._enabled = false
--- a/internet-detector/files/usr/lib/internet-detector/mod_network_restart.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_network_restart.lua
@@ -1,5 +1,5 @@

-local nixio  = require("nixio")
+local unistd = require("posix.unistd")

 local Module = {
 	name             = "mod_network_restart",
@@ -22,9 +22,9 @@ end

 function Module:toggleDevice(flag)
 	local ip = "/sbin/ip"
-	if nixio.fs.access(ip, "x") then
-		return os.execute(
-			string.format("%s link set dev %s %s", ip, self.iface, (flag and "up" or "down"))
+	if unistd.access(ip, "x") then
+		return os.execute(string.format(
+			"%s link set dev %s %s", ip, self.iface, (flag and "up" or "down"))
 		)
 	end
 end
@@ -71,10 +71,11 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 					self.syslog("info", string.format(
 						"%s: restarting network interface '%s'", self.name, self.iface))
 					self:ifaceDown()
-					nixio.nanosleep(self.restartTimeout)
+					unistd.sleep(self.restartTimeout)
 					self:ifaceUp()
 				else
-					self.syslog("info", string.format("%s: restarting network", self.name))
+					self.syslog("info", string.format(
+						"%s: restarting network", self.name))
 					self:networkRestart()
 				end
 				self._deadCounter     = 0
--- a/internet-detector/files/usr/lib/internet-detector/mod_public_ip.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_public_ip.lua
@@ -1,79 +1,322 @@

-local nixio  = require("nixio")
+local socket = require("posix.sys.socket")
+local unistd = require("posix.unistd")

 local Module = {
-	name         = "mod_public_ip",
-	config       = {},
-	syslog       = function(level, msg) return true end,
-	writeValue   = function(filePath, str) return false end,
-	readValue    = function(filePath) return nil end,
-	runInterval  = 600,
-	nslookup     = "/usr/bin/nslookup",
-	timeout      = 3,
-	providers    = {
-		opendns1 = {
-			name = "opendns1", server = "208.67.222.222",
-			host = "myip.opendns.com", queryType = "a"
-		},
-		opendns2 = {
-			name = "opendns2", server = "208.67.220.220",
-			host = "myip.opendns.com", queryType = "a"
-		},
-		opendns3 = {
-			name = "opendns3", server = "208.67.222.220",
-			host = "myip.opendns.com", queryType = "a"
-		},
-		opendns4 = {
-			name = "opendns4", server = "208.67.220.222",
-			host = "myip.opendns.com", queryType = "a"
-		},
-		akamai   = {
-			name = "akamai", server = "ns1-1.akamaitech.net",
-			host = "whoami.akamai.net", queryType = "a"
-		},
-		google   = {
-			name = "google", server = "ns1.google.com",
-			host = "o-o.myaddr.l.google.com", queryType = "txt"
+	name              = "mod_public_ip",
+	config            = {
+		debug = false,
+		serviceConfig = {
+			iface = nil,
 		},
 	},
-	status       = nil,
-	_provider    = nil,
-	_nslookupCmd = nil,
-	_currentIp   = nil,
-	_enabled     = false,
-	_counter     = 0,
+	syslog            = function(level, msg) return true end,
+	writeValue        = function(filePath, str) return false end,
+	readValue         = function(filePath) return nil end,
+	port              = 53,
+	runInterval       = 600,
+	runIntervalFailed = 60,
+	timeout           = 3,
+	reqAttempts       = 3,
+	providers         = {
+		opendns1 = {
+			name = "opendns1", host = "myip.opendns.com",
+			server = "208.67.222.222", server6 = "2620:119:35::35",
+			port = 53, queryType = "A", queryType6 = "AAAA",
+		},
+		opendns2 = {
+			name = "opendns2", host = "myip.opendns.com",
+			server = "208.67.220.220", server6 = "2620:119:35::35",
+			port = 53, queryType = "A", queryType6 = "AAAA",
+		},
+		opendns3 = {
+			name = "opendns3", host = "myip.opendns.com",
+			server = "208.67.222.220", server6 = "2620:119:35::35",
+			port = 53, queryType = "A", queryType6 = "AAAA",
+		},
+		opendns4 = {
+			name = "opendns4", host = "myip.opendns.com",
+			server = "208.67.220.222", server6 = "2620:119:35::35",
+			port = 53, queryType = "A", queryType6 = "AAAA",
+		},
+		akamai   = {
+			name = "akamai", host = "whoami.akamai.net",
+			server = "ns1-1.akamaitech.net", server6 = "ns1-1.akamaitech.net",
+			port = 53, queryType = "A", queryType6 = "AAAA",
+		},
+		google   = {
+			name = "google", host = "o-o.myaddr.l.google.com",
+			server = "ns1.google.com", server6 = "ns1.google.com",
+			port = 53, queryType = "TXT", queryType6 = "TXT",
+		},
+	},
+	status            = nil,
+	_provider         = nil,
+	_qtype            = false,
+	_currentIp        = nil,
+	_enabled          = false,
+	_counter          = 0,
+	_interval         = 600,
+	_DNSPacket        = nil,
 }

-function Module:parseA(str)
-	res = str:match("Name:%s+" .. self._provider.host .. "\nAddress:%s+[%w.:]+")
-	if res then
-		return res:match("[%w.:]+$")
+function Module:getQueryType(type)
+	local types = {
+		A     = 1,
+		NS    = 2,
+		MD    = 3,
+		MF    = 4,
+		CNAME = 5,
+		SOA   = 6,
+		MB    = 7,
+		MG    = 8,
+		MR    = 9,
+		NULL  = 10,
+		WKS   = 11,
+		PTS   = 12,
+		HINFO = 13,
+		MINFO = 14,
+		MX    = 15,
+		TXT   = 16,
+		AAAA  = 28,
+	}
+	return types[type]
+end
+
+function Module:buildMessage(address, queryType)
+	if not queryType then
+		queryType = "A"
+	end
+	queryType = self:getQueryType(queryType)
+
+	local addressString = ""
+	for part in address:gmatch("[^.]+") do
+		local t = {}
+		for i in part:gmatch(".") do
+			t[#t + 1] = i
+		end
+		addrLen       = #part
+		addrPart      = table.concat(t)
+		addressString = addressString .. string.char(addrLen) .. addrPart
+	end
+
+	local data = (
+		string.char(
+			0xaa, 0xaa,
+			0x01, 0x00,
+			0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+		) ..
+		addressString ..
+		string.char(
+			0x00,
+			0x00, queryType,
+			0x00, 0x01
+		)
+	)
+	return data
+end
+
+function Module:sendUDPMessage(message, server, port)
+	local success
+	local retCode = 1
+	local data
+
+	if self.config.debug then
+		io.stdout:write(string.format("--- %s ---\n", self.name))
+		io.stdout:flush()
+	end
+
+	local saTable, errMsg, errNum = socket.getaddrinfo(server, port)
+
+	if not saTable then
+		if self.config.debug then
+			io.stdout:write(string.format(
+				"GETADDRINFO ERROR: %s, %s\n", errMsg, errNum))
+		end
+	else
+		local family = saTable[1].family
+
+		if family then
+			local sock, errMsg, errNum = socket.socket(family, socket.SOCK_DGRAM, 0)
+
+			if not sock then
+				if self.config.debug then
+					io.stdout:write(string.format(
+						"SOCKET ERROR: %s, %s\n", errMsg, errNum))
+				end
+				return retCode
+			end
+
+			socket.setsockopt(sock, socket.SOL_SOCKET,
+				socket.SO_SNDTIMEO, self.timeout, 0)
+			socket.setsockopt(sock, socket.SOL_SOCKET,
+				socket.SO_RCVTIMEO, self.timeout, 0)
+
+			if self.config.serviceConfig.iface then
+				local ok, errMsg, errNum = socket.setsockopt(sock, socket.SOL_SOCKET,
+					socket.SO_BINDTODEVICE, self.config.serviceConfig.iface)
+				if not ok then
+					if self.config.debug then
+						io.stdout:write(string.format(
+							"SOCKET ERROR: %s, %s\n", errMsg, errNum))
+					end
+					return retCode
+				end
+			end
+
+			local ok, errMsg, errNum = socket.sendto(sock, message, saTable[1])
+			local response = {}
+			if ok then
+				local ret, resp, errNum = socket.recvfrom(sock, 1024)
+				data = ret
+				if data then
+					success  = true
+					response = resp
+				elseif self.config.debug then
+					io.stdout:write(string.format(
+						"SOCKET RECV ERROR: %s, %s\n", tostring(resp), tostring(errNum)))
+				end
+			elseif self.config.debug then
+				io.stdout:write(string.format(
+					"SOCKET SEND ERROR: %s, %s\n", tostring(errMsg), tostring(errNum)))
+			end
+
+			if self.config.debug then
+				io.stdout:write(string.format(
+					"--- UDP ---\ntime = %s\nconnection_timeout = %s\niface = %s\nserver = %s:%s\nsockname = %s:%s\nsuccess = %s\n",
+					os.time(),
+					self.timeout,
+					tostring(self.config.serviceConfig.iface),
+					server,
+					tostring(port),
+					tostring(response.addr),
+					tostring(response.port),
+					tostring(success))
+				)
+				io.stdout:flush()
+			end
+
+			unistd.close(sock)
+			retCode = success and 0 or 1
+		end
+	end
+	return retCode, tostring(data)
+end
+
+function Module:parseParts(message, start, parts)
+	local partStart = start + 2
+	local partLen   = message:sub(start, start + 1)
+
+	if #partLen == 0 then
+		return parts
+	end
+
+	local partEnd     = partStart + (tonumber(partLen, 16) * 2)
+	parts[#parts + 1] = message:sub(partStart, partEnd - 1)
+	if message:sub(partEnd, partEnd + 1) == "00" or partEnd > #message then
+		return parts
+	else
+		return self:parseParts(message, partEnd, parts)
 	end
 end

-function Module:parseGoogle(str)
-	res = str:match(self._provider.host .. '%s+text%s+=%s+"[%w.:]+"')
-	if res then
-		return res:gsub('"', ''):match("[%w.:]+$")
+function Module:decodeMessage(message)
+	local retTable = {}
+
+	local t = {}
+	for i = 1, #message do
+		t[#t + 1] = string.format("%.2x", string.byte(message, i))
 	end
+	message = table.concat(t)
+
+	local ANCOUNT = message:sub(13, 16)
+	local NSCOUNT = message:sub(17, 20)
+	local ARCOUNT = message:sub(21, 24)
+
+	local questionSectionStarts = 25
+	local questionParts = self:parseParts(message, questionSectionStarts, {})
+	local qtypeStarts   = questionSectionStarts + (#table.concat(questionParts)) + (#questionParts * 2) + 1
+	local qclassStarts  = qtypeStarts + 4
+
+	local answerSectionStarts = qclassStarts + 4
+	local numAnswers          = math.max(
+		tonumber(ANCOUNT, 16), tonumber(NSCOUNT, 16), tonumber(ARCOUNT, 16))
+
+	if numAnswers > 0 then
+		for answerCount = 1, numAnswers do
+
+			if answerSectionStarts < #message then
+				local ATYPE = tonumber(
+					message:sub(answerSectionStarts + 5, answerSectionStarts + 8), 16)
+				local RDLENGTH = tonumber(
+					message:sub(answerSectionStarts + 21, answerSectionStarts + 24), 16)
+				local RDDATA = message:sub(
+					answerSectionStarts + 25, answerSectionStarts + 24 + (RDLENGTH * 2))
+				local RDDATA_decoded = ""
+
+				if #RDDATA > 0 then
+					if ATYPE == self:getQueryType("A") or ATYPE == self:getQueryType("AAAA") then
+						local octets = {}
+						local sep    = "."
+						if #RDDATA > 8 then
+							sep = ":"
+							for i = 1, #RDDATA, 4 do
+								local string = RDDATA:sub(i, i + 3)
+								string = string:gsub("^00?0?", "")
+								octets[#octets + 1] = string
+							end
+						else
+							for i = 1, #RDDATA, 2 do
+								octets[#octets + 1] = tonumber(RDDATA:sub(i, i + 1), 16)
+							end
+						end
+						RDDATA_decoded = table.concat(octets, sep):gsub("0:[0:]+", "::", 1):gsub("::+", "::")
+					else
+						local rdata_t = {}
+						for _, v in ipairs(self:parseParts(RDDATA, 1, {})) do
+							local t = {}
+							for i = 1, #v, 2 do
+								t[#t + 1] = string.char(tonumber(v:sub(i, i + 1), 16))
+							end
+							rdata_t[#rdata_t + 1] = table.concat(t)
+						end
+						RDDATA_decoded = table.concat(rdata_t)
+					end
+				end
+				answerSectionStarts = answerSectionStarts + 24 + (RDLENGTH * 2)
+
+				if RDDATA_decoded:match("^[a-f0-9.:]+$") then
+					retTable[#retTable + 1] = RDDATA_decoded
+				end
+			end
+		end
+	end
+
+	return retTable
 end

 function Module:resolveIP()
 	local res
-	local fh = io.popen(self._nslookupCmd, "r")
-	if fh then
-		output = fh:read("*a")
-		fh:close()
-		if self._provider.name == "google" then
-			res = self:parseGoogle(output)
-		else
-			res = self:parseA(output)
+	local qtype  = self._qtype and self._provider.queryType6 or self._provider.queryType
+	local server = self._qtype and self._provider.server6 or self._provider.server
+	local port   = self._provider.port or self.port
+
+	if not self._DNSPacket then
+		self._DNSPacket = self:buildMessage(self._provider.host, qtype)
+	end
+
+	local retCode, response = self:sendUDPMessage(self._DNSPacket, server, port)
+	if retCode == 0 then
+		local retTable = self:decodeMessage(response)
+		if #retTable > 0 then
+			res = table.concat(retTable, ", ")
 		end
 	else
 		self.syslog("err", string.format(
-			"%s: Nslookup call failed (%s)", self.name, self.nslookup))
+			"%s: DNS error when requesting an IP address", self.name))
 	end
-	return res or "Undefined"
+
+	return res
 end

 function Module:init(t)
@@ -88,23 +331,11 @@ function Module:init(t)
 	else
 		self._provider = self.providers.opendns1
 	end
-	if not nixio.fs.access(self.nslookup, "x") then
-		self._enabled = false
-		self.syslog(
-			"warning",
-			string.format("%s: '%s' does not exists", self.name, self.nslookup)
-		)
-	else
-		self._enabled     = true
-		self._nslookupCmd = string.format(
-			"%s -type=%s -timeout=%d %s %s",
-			self.nslookup,
-			self._provider.queryType,
-			self.timeout,
-			self._provider.host,
-			self._provider.server
-		)
-	end
+	self._qtype = (tonumber(t.qtype) ~= 0)
+	self._currentIp = nil
+	self._DNSPacket = nil
+	self._interval  = self.runInterval
+	self._enabled   = true
 end

 function Module:run(currentStatus, lastStatus, timeDiff)
@@ -112,8 +343,17 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 		return
 	end
 	if currentStatus == 0 then
-		if self._counter == 0 or self._counter >= self.runInterval or currentStatus ~= lastStatus then
+		if self._counter == 0 or self._counter >= self._interval or currentStatus ~= lastStatus then
+
 			local ip = self:resolveIP()
+
+			if not ip then
+				ip = "Undefined"
+				self._interval = self.runIntervalFailed
+			else
+				self._interval = self.runInterval
+			end
+
 			if ip ~= self._currentIp then
 				self.status = ip
 				self.syslog(
@@ -123,6 +363,7 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 			else
 				self.status = nil
 			end
+
 			self._currentIp = ip
 			self._counter   = 0
 		else
@@ -132,7 +373,9 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 		self.status     = nil
 		self._currentIp = nil
 		self._counter   = 0
+		self._interval  = self.runInterval
 	end
+
 	self._counter = self._counter + timeDiff
 end

--- a/internet-detector/files/usr/lib/internet-detector/mod_reboot.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_reboot.lua
@@ -1,5 +1,5 @@

-local nixio  = require("nixio")
+local unistd = require("posix.unistd")

 local Module = {
 	name             = "mod_reboot",
@@ -16,9 +16,8 @@ local Module = {
 function Module:rebootDevice()
 	self.syslog("warning", string.format("%s: reboot", self.name))
 	os.execute("/sbin/reboot &")
-
 	if self.forceRebootDelay > 0 then
-		nixio.nanosleep(self.forceRebootDelay)
+		unistd.sleep(self.forceRebootDelay)
 		self.syslog("warning", string.format("%s: force reboot", self.name))
 		self.writeValue("/proc/sys/kernel/sysrq", "1")
 		self.writeValue("/proc/sysrq-trigger", "b")
--- a/internet-detector/files/usr/lib/internet-detector/mod_user_scripts.lua
+++ b/internet-detector/files/usr/lib/internet-detector/mod_user_scripts.lua
@@ -1,5 +1,5 @@

-local nixio  = require("nixio")
+local unistd = require("posix.unistd")

 local Module = {
 	name                = "mod_user_scripts",
@@ -19,8 +19,8 @@ local Module = {
 }

 function Module:runExternalScript(scriptPath)
-	if nixio.fs.access(scriptPath, "x") then
-		os.execute(string.format('/bin/sh -c "%s" &', scriptPath))
+	if unistd.access(scriptPath, "r") then
+		os.execute(string.format('/bin/sh "%s" &', scriptPath))
 	end
 end

@@ -28,8 +28,10 @@ function Module:init(t)
 	self.deadPeriod  = tonumber(t.dead_period)
 	self.alivePeriod = tonumber(t.alive_period)
 	if self.config.configDir then
-		self.upScript   = string.format("%s/up-script", self.config.configDir)
-		self.downScript = string.format("%s/down-script", self.config.configDir)
+		self.upScript   = string.format(
+			"%s/up-script.%s", self.config.configDir, self.config.serviceConfig.instance)
+		self.downScript = string.format(
+			"%s/down-script.%s", self.config.configDir, self.config.serviceConfig.instance)
 	end
 end

@@ -37,7 +39,6 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 	if currentStatus == 1 then
 		self._aliveCounter       = 0
 		self._downScriptExecuted = false
-
 		if not self._upScriptExecuted then
 			if self._deadCounter >= self.deadPeriod then
 				self:runExternalScript(self.downScript)
@@ -49,7 +50,6 @@ function Module:run(currentStatus, lastStatus, timeDiff)
 	else
 		self._deadCounter      = 0
 		self._upScriptExecuted = false
-
 		if not self._downScriptExecuted then
 			if self._aliveCounter >= self.alivePeriod then
 				self:runExternalScript(self.upScript)