From 445b8e7072bc4a0d443f7e95d9694e4224c3ce53 Mon Sep 17 00:00:00 2001
From: Matthias Wachs <wachs@net.in.tum.de>
Date: Tue, 9 Jul 2013 09:21:04 +0000
Subject: [PATCH] fix segfault on missing type

---
 src/ats-tool/gnunet-ats.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/ats-tool/gnunet-ats.c b/src/ats-tool/gnunet-ats.c
index 32813c3a0..1e2d347e7 100644
--- a/src/ats-tool/gnunet-ats.c
+++ b/src/ats-tool/gnunet-ats.c
@@ -418,6 +418,12 @@ testservice_ats (void *cls,
     }
     else if (op_set_pref)
     {
+    		if (NULL == type_str)
+    		{
+    			fprintf (stderr, "No preference type given!\n");
+    			return;
+    		}
+
         for (c = 0; c<strlen(type_str); c++)
         {
           if (isupper (type_str[c]))
@@ -484,6 +490,7 @@ main (int argc, char *const *argv)
   op_set_pref = GNUNET_NO;
   pending = 0;
   receive_done = GNUNET_NO;
+  type_str = NULL;
 
   static const struct GNUNET_GETOPT_CommandLineOption options[] = {
       {'u', "used", NULL,
-- 
2.25.1