--- a/plugins/mod_c2s.lua	Tue Jun 11 21:18:51 2013 +0200
+++ b/plugins/mod_c2s.lua	Tue Jun 11 21:36:15 2013 +0200
@@ -265,15 +265,23 @@
 function listener.onreadtimeout(conn)
 	local session = sessions[conn];
 	if session then
-		return session.send(' ');
+		return (hosts[session.host] or prosody).events.fire_event("c2s-read-timeout", { session = session });
 	end
 end
 
+local function keepalive(event)
+	return event.session.send(' ');
+end
+
 function listener.associate_session(conn, session)
 	sessions[conn] = session;
 end
 
-function module.add_host() end
+function module.add_host(module)
+	module:hook("c2s-read-timeout", keepalive, -1);
+end
+
+module:hook("c2s-read-timeout", keepalive, -1);
 
 module:hook("server-stopping", function(event)
 	local reason = event.reason;

--- a/plugins/mod_s2s/mod_s2s.lua	Tue Jun 11 21:18:51 2013 +0200
+++ b/plugins/mod_s2s/mod_s2s.lua	Tue Jun 11 21:36:15 2013 +0200
@@ -135,6 +135,10 @@
 	return true;
 end
 
+local function keepalive(event)
+	return event.session.sends2s(' ');
+end
+
 function module.add_host(module)
 	if module:get_option_boolean("disallow_s2s", false) then
 		module:log("warn", "The 'disallow_s2s' config option is deprecated, please see http://prosody.im/doc/s2s#disabling");
@@ -143,6 +147,7 @@
 	module:hook("route/remote", route_to_existing_session, -1);
 	module:hook("route/remote", route_to_new_session, -10);
 	module:hook("s2s-authenticated", make_authenticated, -1);
+	module:hook("s2s-read-timeout", keepalive, -1);
 end
 
 -- Stream is authorised, and ready for normal stanzas
@@ -628,7 +633,7 @@
 function listener.onreadtimeout(conn)
 	local session = sessions[conn];
 	if session then
-		return session.sends2s(' ');
+		return (hosts[session.host] or prosody).events.fire_event("s2s-read-timeout", { session = session });
 	end
 end