add

@@ -13,7 +13,14 @@ local local_cidr = {
 
  -- check if ip is local
  -- depends on ngx.real_ip from setup.lua
-function check_local_access(ip)
+function check_local_access()
+    
+    -- read ip from ngx.real_ip
+    local ip = ngx.real_ip
+    if (ngx.real_ip == nil or ngx.real_ip == '') then
+        return
+    end
+
     local is_local_ip = false
     for i = 1, #local_cidr do
       local is_in_cidr = iptool:pcall_check_ip_in_ipblock(ip, local_cidr[i],false)
@@ -23,10 +30,6 @@ function check_local_access(ip)
       end
     end
     
-    if (ngx.real_ip == nil or ngx.real_ip == '') then
-        return
-    end
-
     if not is_local_ip then
         ngx.exit(403);
         return