From 0d20cd94de79cf739659c8116d5f1e764dc50141 Mon Sep 17 00:00:00 2001
From: Mikael Magnusson <mikma@users.sourceforge.net>
Date: Wed, 27 Mar 2019 23:23:34 +0100
Subject: BGP: Fix empty tunnel encap

---
 proto/bgp/attrs.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index a27871bc..35ae4704 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -653,6 +653,12 @@ bgp_format_tunnel_encap(eattr *a, byte *buf, uint size)
 {
   char *pos = buf;
 
+  if (a->u.ptr->length == 0)
+    {
+      bsprintf(pos, "");
+      return;
+    }
+
   for (uint i = 0; i < a->u.ptr->length; i++)
   {
     if (size < 4)
-- 
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