From 045b08e7a818c096962acf8697b84e475d7c5b71 Mon Sep 17 00:00:00 2001
From: Tommaso Pecorella <tommaso.pecorella@unifi.it>
Date: Fri, 8 Jan 2016 01:43:55 +0100
Subject: [PATCH] RipNg: avoid calling null error callback

---
 src/internet/model/ripng.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/internet/model/ripng.cc b/src/internet/model/ripng.cc
index 0c31ad4a0..e9528bb02 100644
--- a/src/internet/model/ripng.cc
+++ b/src/internet/model/ripng.cc
@@ -224,7 +224,10 @@ bool RipNg::RouteInput (Ptr<const Packet> p, const Ipv6Header &header, Ptr<const
       header.GetSourceAddress ().IsLinkLocal ())
     {
       NS_LOG_LOGIC ("Dropping packet not for me and with src or dst LinkLocal");
-      ecb (p, header, Socket::ERROR_NOROUTETOHOST);
+      if (!ecb.IsNull ())
+        {
+          ecb (p, header, Socket::ERROR_NOROUTETOHOST);
+        }
       return false;
     }