on RTX1210 (5) - DDNS(NoIP)更新

RTX1210 BootROM Ver. 1.04
RTX1210 FlashROM Table Ver. 1.00
RTX1210 Rev.14.01.38 (Fri Jul 10 09:41:02 2020)

--
-- update_ddns.lua
-- DDNS update via No-IP
--

require "strict"
local slack = require "slack"

local inet_url = os.getenv("INET_URL") or "http://inet-ip.info/ip"
local noip_url = os.getenv("NOIP_URL") or "http://dynupdate.no-ip.com/nic/update"
local noip_hostname = os.getenv("NOIP_HOSTNAME") or "example.ddns.net"
local noip_name = os.getenv("NOIP_NAME") or "[email protected]"
local noip_password = os.getenv("NOIP_PASSWORD") or "xxxxxxxx"

local function log(priority, message)
  if priority == "DEBUG" then
    rt.syslog("notice", message)
  else
    rt.syslog("info", message)
    slack.post(priority, message)
  end
end

local function get_remote_ip()
  local request_inet = {
    url = inet_url,
    method = "GET"
  }
  local response_inet = rt.httprequest(request_inet)
  if response_inet.rtn1 then
    local ip_address = response_inet.body
    log("DEBUG", "(update_ddns.lua) Global IP Address from inet-ip.info: " .. ip_address)
    return ip_address
  else
    log("ERROR", "(update_ddns.lua) Failed to fetch Global IP Address.")
  end
end

local function update_ddns(ip_address)
  local request_noip = {
    url = $[[${noip_url}?hostname=${noip_hostname}&myip={ip_address}]],
    method = "GET",
    auth_type = "basic",
    auth_name = noip_name,
    auth_pass = noip_password
  }
  local response_noip = rt.httprequest(request_noip)
  if response_noip.code == 200 then
    log("INFO", "(update_ddns.lua) Successfully updated: dynupdate.no-ip.com -> " .. response_noip.body)
  else
    log("ERROR", "(update_ddns.lua) Failed to update DDNS.")
  end
end

local current_ip = os.getenv("GLOBAL_IP")
local remote_ip = get_remote_ip()

if remote_ip then
  if current_ip then
    if current_ip ~= remote_ip then
      update_ddns(remote_ip)
    else
      log("DEBUG", "(update_ddns.lua) No need to update.")
    end
  else
    log("INFO", "(update_ddns.lua) GLOBAL_IP was not set.")
  end
  rt.command("set GLOBAL_IP=" .. remote_ip)
end

set NOIP_URL="http://dynupdate.no-ip.com/nic/update"
set NOIP_HOSTNAME="example.ddns.net"
set NOIP_NAME="[email protected]"
set NOIP_PASSWORD="xxxxxxxx"

schedule at 3 */* *:00 * * lua /lua/update_ddns.lua