From ff6caf241c4d57d3ef124a8b7c3144a09f320ea0 Mon Sep 17 00:00:00 2001
From: fiaxh <git@lightrise.org>
Date: Mon, 26 Aug 2019 16:27:47 +0200
Subject: [PATCH] Add missing 'to' attribute when sending service-unavailable
 for an unknown IG get/set NS

fixes #604
---
 xmpp-vala/src/module/iq/module.vala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xmpp-vala/src/module/iq/module.vala b/xmpp-vala/src/module/iq/module.vala
index f73f5459..f5cb6acf 100644
--- a/xmpp-vala/src/module/iq/module.vala
+++ b/xmpp-vala/src/module/iq/module.vala
@@ -67,7 +67,8 @@ namespace Xmpp.Iq {
                         }
                     }
                 } else {
-                    Iq.Stanza unavailable_error = new Iq.Stanza.error(iq, new ErrorStanza.service_unavailable());
+                    // Send error if we don't handle the NS of the IQ get/set payload (RFC6120 10.3.3 (2))
+                    Iq.Stanza unavailable_error = new Iq.Stanza.error(iq, new ErrorStanza.service_unavailable()) { to=iq.from };
                     send_iq(stream, unavailable_error);
                 }
             }