From dd7d54cfccb34076b46f3f51e7fe872b199b90a9 Mon Sep 17 00:00:00 2001
From: ThorstenB <brehmt@gmail.com>
Date: Mon, 13 Nov 2017 19:08:05 +0100
Subject: [PATCH] Do not crash when specifying an unsupported transport medium
 for an I/O protocol.

---
 src/Main/fg_io.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Main/fg_io.cxx b/src/Main/fg_io.cxx
index c75138e91..a1df491ff 100644
--- a/src/Main/fg_io.cxx
+++ b/src/Main/fg_io.cxx
@@ -328,6 +328,12 @@ FGIO::parse_port_config( const string& config )
 
         io->set_io_channel( new SGSocket( hostname, port, style ) );
     }
+    else
+    {
+        SG_LOG( SG_IO, SG_ALERT, "Unknown transport medium \"" << medium << "\" in \"" << config << "\"");
+        delete io;
+        return NULL;
+    }
 
     return io;
 }