view mod_register_dnsbl_warn/mod_register_dnsbl_warn.lua @ 5296:0f5657db1cfc

mod_isolate_host: handle server-generated stanzas The hook for setting the no_host_isolation is only called for c2s sessions. This does not work for stanzas generated by the server, such as PEP notifications or presence probe answers. To handle that, we do per-stanza checks for the case that the origin is local.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 01 Apr 2023 12:03:08 +0200
parents 76036fa34055
children
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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);