Mercurial > prosody-hg

changeset 14154:363a79f54109 0.12

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mod_c2s, mod_s2s: Add configurable limit for stanza max child elements
author Matthew Wild <mwild1@gmail.com>
date Thu, 16 Apr 2026 18:53:34 +0100
parents aa29d5144c20
children ead9e645741a
files plugins/mod_c2s.lua plugins/mod_s2s.lua
diffstat 2 files changed, 8 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/plugins/mod_c2s.lua	Thu Apr 16 18:52:58 2026 +0100
+++ b/plugins/mod_c2s.lua	Thu Apr 16 18:53:34 2026 +0100
@@ -30,6 +30,7 @@
 local opt_keepalives = module:get_option_boolean("c2s_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true));
 local unauthed_stanza_size_limit = module:get_option_number("c2s_unauthed_stanza_size_limit", 10000,1000);
 local authed_stanza_size_limit = module:get_option_number("c2s_stanza_size_limit", 1024*256,10000);
+local max_child_elements = module:get_option_number("c2s_max_child_elements", 25000, 0);
 
 local measure_connections = module:metric("gauge", "connections", "", "Established c2s connections", {"host", "type", "ip_family"});
 
@@ -315,7 +316,9 @@
 
 	session.stanza_size_limit = unauthed_stanza_size_limit;
 
-	local stream = new_xmpp_stream(session, stream_callbacks, session.stanza_size_limit);
+	local stream = new_xmpp_stream(session, stream_callbacks, session.stanza_size_limit, {
+		max_elements = max_child_elements;
+	});
 	session.stream = stream;
 	session.notopen = true;
 
--- a/plugins/mod_s2s.lua	Thu Apr 16 18:52:58 2026 +0100
+++ b/plugins/mod_s2s.lua	Thu Apr 16 18:53:34 2026 +0100
@@ -43,6 +43,7 @@
 local require_encryption = module:get_option_boolean("s2s_require_encryption", true);
 local unauthed_stanza_size_limit = module:get_option_number("s2s_unauthed_stanza_size_limit", 10000, 1000);
 local authed_stanza_size_limit = module:get_option_number("s2s_stanza_size_limit", 1024*512, 10000);
+local max_child_elements = module:get_option_number("s2s_max_child_elements", 25000, 0);
 
 local measure_connections_inbound = module:metric(
 	"gauge", "connections_inbound", "",
@@ -736,7 +737,9 @@
 
 -- Session initialization logic shared by incoming and outgoing
 local function initialize_session(session)
-	local stream = new_xmpp_stream(session, stream_callbacks, session.stanza_size_limit or unauthed_stanza_size_limit);
+	local stream = new_xmpp_stream(session, stream_callbacks, session.stanza_size_limit, {
+		max_elements = max_child_elements;
+	});
 
 	session.thread = runner(function (stanza)
 		if st.is_stanza(stanza) then