File sleekxmpp-check-roster-push-origin.patch of Package python-sleekxmpp

--- a/sleekxmpp/clientxmpp.py
+++ b/sleekxmpp/clientxmpp.py
@@ -16,6 +16,7 @@ from __future__ import absolute_import,
 
 import logging
 
+from sleekxmpp.jid import JID
 from sleekxmpp.stanza import StreamFeatures
 from sleekxmpp.basexmpp import BaseXMPP
 from sleekxmpp.exceptions import XMPPError
@@ -99,7 +100,17 @@ class ClientXMPP(BaseXMPP):
         self.add_event_handler('roster_update', self._handle_roster)
 
         self.register_stanza(StreamFeatures)
-
+        def roster_push_filter(iq):
+            from_ = iq['from']
+            if from_ and from_ != JID('') and from_ != self.boundjid.bare:
+                reply = iq.reply()
+                reply['type'] = 'error'
+                reply['error']['type'] = 'cancel'
+                reply['error']['code'] = 503
+                reply['error']['condition'] = 'service-unavailable'
+                reply.send()
+                return
+            self.event('roster_update', iq)
         self.register_handler(
                 Callback('Stream Features',
                          MatchXPath('{%s}features' % self.stream_ns),
@@ -107,7 +118,7 @@ class ClientXMPP(BaseXMPP):
         self.register_handler(
                 Callback('Roster Update',
                          StanzaPath('iq@type=set/roster'),
-                         lambda iq: self.event('roster_update', iq)))
+                         roster_push_filter))
 
         # Setup default stream features
         self.register_plugin('feature_starttls')