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