core.stanza_router: Do strict jidprep on c2s
Be conservative in what you let your clients send, be liberal in what
you let in via s2s.
Being strict on s2s leads to interop problems and poor experiences, ie
users being ejected from MUCs if something invalid enters. By starting
with tightening up input into the network, we may be able to gradually
approach a point where no invalid JIDs are allowed.
--- a/core/stanza_router.lua Wed Oct 30 16:22:44 2019 +0100
+++ b/core/stanza_router.lua Mon Sep 09 22:32:01 2019 +0200
@@ -83,7 +83,7 @@
if full_sessions[to] or bare_sessions[to] or hosts[to] then
node, host = jid_split(to); -- TODO only the host is needed, optimize
else
- node, host, resource = jid_prepped_split(to);
+ node, host, resource = jid_prepped_split(to, origin.type == "c2s");
if not host then
log("warn", "Received stanza with invalid destination JID: %s", to);
if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then