Mercurial > prosody-modules
view mod_register_dnsbl/mod_register_dnsbl.lua @ 3571:f5ea0b886c7c
mod_storage_xmlarchive: Limit search to smallest time range in case of inexact match
This should improve performance in case the exact days in the 'start'
and 'end' range are missing from the index.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Fri, 03 May 2019 18:59:38 +0200 |
parents | bf9fc41bf7ad |
children | 82482e7e92cb |
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local adns = require "net.adns"; local async = require "util.async"; local inet_pton = require "util.net".pton; local to_hex = require "util.hex".to; local rbl = module:get_option_string("registration_rbl"); local function reverse(ip, suffix) local n, err = inet_pton(ip); if not n then return n, err end if #n == 4 then local a,b,c,d = n:byte(1,4); return ("%d.%d.%d.%d.%s"):format(d,c,b,a, suffix); elseif #n == 16 then return to_hex(n):reverse():gsub("%x", "%1.") .. suffix; end end module:hook("user-registering", function (event) local session, ip = event.session, event.ip; if not ip then session.log("debug", "Unable to check DNSBL when IP is unknown"); return; end local rbl_ip, err = reverse(ip, rbl); if not rbl_ip then session.log("debug", "Unable to check DNSBL for ip %s: %s", ip, err); return; end local wait, done = async.waiter(); adns.lookup(function (reply) if reply and reply[1] and reply[1].a then session.log("debug", "DNSBL response: %s IN A %s", rbl_ip, reply[1].a); session.log("info", "Blocking %s from registering %s (dnsbl hit)", ip, event.username); event.allowed = false; event.reason = "Blocked by DNSBL"; end done(); end, rbl_ip); wait(); end);