From 3d3123d4904b3e8deffbb3a6c70f5ff846594e9a Mon Sep 17 00:00:00 2001
From: Tom Henderson <tomh@tomh.org>
Date: Fri, 23 Jan 2015 11:31:51 -0800
Subject: [PATCH] error check program input

---
 examples/tcp/tcp-nsc-comparison.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/examples/tcp/tcp-nsc-comparison.cc b/examples/tcp/tcp-nsc-comparison.cc
index c90438843..7752e12a5 100644
--- a/examples/tcp/tcp-nsc-comparison.cc
+++ b/examples/tcp/tcp-nsc-comparison.cc
@@ -61,6 +61,11 @@ main (int argc, char *argv[])
 
   SeedManager::SetSeed (m_seed);
 
+  if (m_stack != "nsc-linux" && m_stack != "ns3")
+    {
+      NS_FATAL_ERROR ("Error, stack named " << m_stack << " is not supported");
+    }
+
   NodeContainer lefts, routers, rights, nodes;
   lefts.Create (m_nNodes);
   routers.Create (2);