Mercurial > prosody-modules
view mod_register_dnsbl/mod_register_dnsbl.lua @ 4838:fd2e48d4ac94
mod_bookmarks2: Advertise XEP-0049 support
In the case mod_private isn’t loaded, some clients (like poezio) won’t even
attempt to use Private XML Storage unless this feature is advertised. This is
on the domain JID and not on the account JID!
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
---|---|
date | Sun, 26 Dec 2021 14:51:35 +0100 |
parents | 82482e7e92cb |
children |
line wrap: on
line source
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; local log = (session and session.log) or module._log; if not ip then log("debug", "Unable to check DNSBL when IP is unknown"); return; end local rbl_ip, err = reverse(ip, rbl); if not rbl_ip then 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 log("debug", "DNSBL response: %s IN A %s", rbl_ip, reply[1].a); 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);