mod_s2s: Close connection on smacks timeout This merges the mod_s2s_smacks_timeout behavior from prosody-modules This event is fired by mod_smacks when the connection has not responded to an ack-request for a period of time defaulting to 30 seconds, indicating that the connection has become stuck or non-responsive. Closing it prevents routing further messages via this connection and frees resources. A stuck connection may otherwise remain until for a time determined by the OS TCP subsystem, which can be quite long.

author: Kim Alvefur <zash@zash.se>
date: Sat, 02 Dec 2023 20:20:05 +0100
parent: 13298:b7c08f32112c
child: 13444:783706350faa
--- a/plugins/mod_s2s.lua	Fri Dec 01 23:43:18 2023 +0100
+++ b/plugins/mod_s2s.lua	Sat Dec 02 20:20:05 2023 +0100
@@ -272,6 +272,12 @@
 	end, 100);
 	module:hook("s2s-authenticated", make_authenticated, -1);
 	module:hook("s2s-read-timeout", keepalive, -1);
+	module:hook("smacks-ack-delayed", function (event)
+		if event.origin.type == "s2sin" or event.origin.type == "s2sout" then
+			event.origin:close("connection-timeout");
+			return true;
+		end
+	end, -1);
 	module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza) -- luacheck: ignore 212/stanza
 		local limits = stanza:get_child("limits", "urn:xmpp:stream-limits:0");
 		if limits then