pep-service: discard suspicious event messsages (fdo #28232)

For some reason recent ejabberd are sending 'error' messages when we publish
to a PEP node. That's probably an ejabberd bug (EJAB-1239) but Wocky should
ignore those rather than parsing them as actual PEP updates.

1 files changed, 11 insertions, 0 deletions

diff --git a/wocky/wocky-pep-service.c b/wocky/wocky-pep-service.c
index 4d5ad89..8146937 100644
--- a/wocky/wocky-pep-service.c
+++ b/wocky/wocky-pep-service.c
@@ -213,6 +213,7 @@ msg_event_cb (WockyPorter *porter,
   WockyPepServicePrivate *priv = self->priv;
   const gchar *from;
   WockyBareContact *contact;
+  WockyStanzaSubType sub_type;
 
   from = wocky_node_get_attribute (wocky_stanza_get_top_node (stanza),
       "from");
@@ -222,6 +223,16 @@ msg_event_cb (WockyPorter *porter,
       return FALSE;
     }
 
+  wocky_stanza_get_type_info (stanza, NULL, &sub_type);
+
+  /* type of the message is supposed to be 'headline' but old ejabberd
+   * omits it */
+  if (sub_type != WOCKY_STANZA_SUB_TYPE_NONE &&
+      sub_type != WOCKY_STANZA_SUB_TYPE_HEADLINE)
+    {
+      return FALSE;
+    }
+
   contact = wocky_contact_factory_ensure_bare_contact (
       priv->contact_factory, from);