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-rw-r--r--plugins/mod_s2s_bidi.lua40
1 files changed, 40 insertions, 0 deletions
diff --git a/plugins/mod_s2s_bidi.lua b/plugins/mod_s2s_bidi.lua
new file mode 100644
index 00000000..28e047de
--- /dev/null
+++ b/plugins/mod_s2s_bidi.lua
@@ -0,0 +1,40 @@
+-- Prosody IM
+-- Copyright (C) 2019 Kim Alvefur
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local st = require "util.stanza";
+
+local xmlns_bidi_feature = "urn:xmpp:features:bidi"
+local xmlns_bidi = "urn:xmpp:bidi";
+
+local require_encryption = module:get_option_boolean("s2s_require_encryption", false);
+
+module:hook("s2s-stream-features", function(event)
+ local origin, features = event.origin, event.features;
+ if origin.type == "s2sin_unauthed" and (not require_encryption or origin.secure) then
+ features:tag("bidi", { xmlns = xmlns_bidi_feature }):up();
+ end
+end);
+
+module:hook_tag("http://etherx.jabber.org/streams", "features", function (session, stanza)
+ if session.type == "s2sout_unauthed" and (not require_encryption or session.secure) then
+ local bidi = stanza:get_child("bidi", xmlns_bidi_feature);
+ if bidi then
+ session.incoming = true;
+ session.log("debug", "Requesting bidirectional stream");
+ session.sends2s(st.stanza("bidi", { xmlns = xmlns_bidi }));
+ end
+ end
+end, 200);
+
+module:hook_tag("urn:xmpp:bidi", "bidi", function(session)
+ if session.type == "s2sin_unauthed" and (not require_encryption or session.secure) then
+ session.log("debug", "Requested bidirectional stream");
+ session.outgoing = true;
+ return true;
+ end
+end);
+