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mod_register_dnsbl_warn/mod_register_dnsbl_warn.lua @ 4537:53ee391ca689
mod_smacks: Fix traceback due to session being destroyed in send()
Sending something can cause the OS to notice that the connection is dead
and then the connection can be dead at this point. More likely if
opportunistic_writes is enabled.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 01 Apr 2021 11:35:26 +0200 |
parent | 3993:76036fa34055 |
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local adns = require "net.adns"; local rbl = module:get_option_string("registration_rbl"); local function reverse(ip, suffix) if ip:sub(1,7):lower() == "::ffff:" then ip = ip:sub(8); end local a,b,c,d = ip:match("^(%d+).(%d+).(%d+).(%d+)$"); if not a then return end return ("%d.%d.%d.%d.%s"):format(d,c,b,a, suffix); end -- TODO async -- module:hook("user-registering", function (event) end); module:hook("user-registered", function (event) local session = event.session; local ip = session and session.ip; local rbl_ip = ip and reverse(ip, rbl); if rbl_ip then local log = session.log; adns.lookup(function (reply) if reply and reply[1] then log("warn", "Account %s@%s registered from IP %s found in RBL (%s)", event.username, event.host or module.host, ip, reply[1].a); end end, rbl_ip); end end);