From f6e2840947a3965dfad878ef9745ff1dec52ebf5 Mon Sep 17 00:00:00 2001
From: Evgeniy Khramtsov <ekhramtsov@process-one.net>
Date: Wed, 1 Mar 2017 00:17:27 +0300
Subject: [PATCH] External components must always provide 'to' attribute

---
 src/xmpp_stream_in.erl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/xmpp_stream_in.erl b/src/xmpp_stream_in.erl
index 7264b6d5a..c80fafe0e 100644
--- a/src/xmpp_stream_in.erl
+++ b/src/xmpp_stream_in.erl
@@ -458,8 +458,8 @@ process_stream(#stream_start{lang = Lang},
     Txt = <<"Too long value of 'xml:lang' attribute">>,
     send_pkt(State, xmpp:serr_policy_violation(Txt, DefaultLang));
 process_stream(#stream_start{to = undefined, version = Version} = StreamStart,
-	       #{lang := Lang, server := Server} = State) ->
-    if Version < {1,0} ->
+	       #{lang := Lang, server := Server, xmlns := NS} = State) ->
+    if Version < {1,0} andalso NS /= ?NS_COMPONENT ->
 	    %% Work-around for gmail servers
 	    To = jid:make(Server),
 	    process_stream(StreamStart#stream_start{to = To}, State);