65 lines
1.5 KiB
Lua
65 lines
1.5 KiB
Lua
local M = {}
|
|
local dns = require "dns"
|
|
local iputils = require "resty.iputils"
|
|
local ip_list = {%WHITELIST_IP_LIST%}
|
|
local reverse_list = {%WHITELIST_REVERSE_LIST%}
|
|
local whitelist = iputils.parse_cidrs(ip_list)
|
|
local ip = ngx.var.remote_addr
|
|
|
|
function M.ip_cached_ok ()
|
|
return ngx.shared.whitelist_ip_cache:get(ip) == "ok"
|
|
end
|
|
|
|
function M.reverse_cached_ok ()
|
|
return ngx.shared.whitelist_reverse_cache:get(ip) == "ok"
|
|
end
|
|
|
|
function M.ip_cached ()
|
|
return ngx.shared.whitelist_ip_cache:get(ip) ~= nil
|
|
end
|
|
|
|
function M.reverse_cached ()
|
|
return ngx.shared.whitelist_reverse_cache:get(ip) ~= nil
|
|
end
|
|
|
|
function M.check_ip ()
|
|
if #ip_list > 0 then
|
|
if iputils.ip_in_cidrs(ip, whitelist) then
|
|
ngx.shared.whitelist_ip_cache:set(ip, "ok", 86400)
|
|
ngx.log(ngx.NOTICE, "ip " .. ip .. " is in whitelist")
|
|
return true
|
|
end
|
|
end
|
|
ngx.shared.whitelist_ip_cache:set(ip, "ko", 86400)
|
|
return false
|
|
end
|
|
|
|
function M.check_reverse ()
|
|
if #reverse_list > 0 then
|
|
local rdns = dns.get_reverse()
|
|
if rdns ~= "" then
|
|
local whitelisted = false
|
|
for k, v in ipairs(reverse_list) do
|
|
if rdns:sub(-#v) == v then
|
|
whitelisted = true
|
|
break
|
|
end
|
|
end
|
|
if whitelisted then
|
|
local ips = dns.get_ips(rdns)
|
|
for k, v in ipairs(ips) do
|
|
if v == ip then
|
|
ngx.shared.whitelist_reverse_cache:set(ip, "ok", 86400)
|
|
ngx.log(ngx.NOTICE, "reverse " .. rdns .. " is in whitelist")
|
|
return true
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
ngx.shared.whitelist_reverse_cache:set(ip, "ko", 86400)
|
|
return false
|
|
end
|
|
|
|
return M
|