From a74ce8e7ad39f892aead93d8e25c87d139108bde Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 14 Jan 2017 18:01:12 +0100
Subject: [PATCH] trying to fix issue reported by Lurchi

---
 src/transport/gnunet-service-transport_neighbours.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/transport/gnunet-service-transport_neighbours.c b/src/transport/gnunet-service-transport_neighbours.c
index d82112e03..e1e4f56f8 100644
--- a/src/transport/gnunet-service-transport_neighbours.c
+++ b/src/transport/gnunet-service-transport_neighbours.c
@@ -2236,6 +2236,14 @@ GST_neighbours_handle_session_syn (const struct GNUNET_MessageHeader *message,
   scm = (const struct TransportSynMessage *) message;
   GNUNET_break_op (0 == ntohl (scm->reserved));
   ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
+  if (0 ==
+      memcmp (&GST_my_identity,
+              peer,
+              sizeof (struct GNUNET_PeerIdentity)))
+  {
+    /* loopback connection-to-self, ignore */
+    return GNUNET_SYSERR;
+  }
   n = lookup_neighbour (peer);
   if (NULL == n)
   {
-- 
2.25.1