From 25fb8c9a3a6e52d639ed2ecef281f99097ea01f9 Mon Sep 17 00:00:00 2001
From: Yann Leboulanger <asterix@lagaule.org>
Date: Thu, 24 Nov 2016 22:42:33 +0100
Subject: [PATCH] don't crash when we get a wrong feature negotiation form

---
 src/common/connection_handlers_events.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/common/connection_handlers_events.py b/src/common/connection_handlers_events.py
index 00c9eb61e..60840f96f 100644
--- a/src/common/connection_handlers_events.py
+++ b/src/common/connection_handlers_events.py
@@ -1276,6 +1276,9 @@ class MessageReceivedEvent(nec.NetworkIncomingEvent, HelperEvent):
                 if not form:
                     return
 
+                if not form.getField('FORM_TYPE'):
+                    return
+                
                 if form['FORM_TYPE'] == 'urn:xmpp:ssn':
                     self.session.handle_negotiation(form)
                 else: