mod_c2s, mod_s2s, mod_component, mod_bosh, mod_websockets: Set default stanza size limits c2s/bosh/ws streams will default to 256KB, s2s and components to 512KB. These values are aligned with ejabberd's default settings, which should reduce issues related to inconsistent size limits between servers on the XMPP network. The previous default (10MB) is excessive for any production server, and allows significant memory usage by even unauthenticated sessions.

author: Matthew Wild <mwild1@gmail.com>
date: Fri, 07 May 2021 17:03:49 +0100
parent: 9562:acf74ad0b795
child: 11560:3bbb1af92514
--- a/plugins/mod_component.lua	Fri May 07 16:41:39 2021 +0100
+++ b/plugins/mod_component.lua	Fri May 07 17:03:49 2021 +0100
@@ -27,6 +27,7 @@
 local log = module._log;
 
 local opt_keepalives = module:get_option_boolean("component_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true));
+local stanza_size_limit = module:get_option_number("component_stanza_size_limit", module:get_option_number("s2s_stanza_size_limit", 1024*512));
 
 local sessions = module:shared("sessions");
 
@@ -297,7 +298,7 @@
 
 	session.log("info", "Incoming Jabber component connection");
 
-	local stream = new_xmpp_stream(session, stream_callbacks);
+	local stream = new_xmpp_stream(session, stream_callbacks, stanza_size_limit);
 	session.stream = stream;
 
 	session.notopen = true;