From c188bee3e389257fa13950039b877ea6c334c7d1 Mon Sep 17 00:00:00 2001
From: Brian O'Connor <bocon@onlab.us>
Date: Thu, 11 Jul 2013 11:17:46 -0700
Subject: [PATCH] Fixed divide by 0 error in ping command when no packets are
 sent fixes #143

---
 mininet/net.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/mininet/net.py b/mininet/net.py
index 71c8ec0..db594c3 100755
--- a/mininet/net.py
+++ b/mininet/net.py
@@ -468,9 +468,13 @@ class Mininet( object ):
                     lost += sent - received
                     output( ( '%s ' % dest.name ) if received else 'X ' )
             output( '\n' )
+        if packets > 0:
             ploss = 100 * lost / packets
-        output( "*** Results: %i%% dropped (%d/%d lost)\n" %
-                ( ploss, lost, packets ) )
+            output( "*** Results: %i%% dropped (%d/%d lost)\n" %
+                    ( ploss, lost, packets ) )
+        else:
+            ploss = 0
+            output( "*** Warning: No packets sent\n" )
         return ploss
 
     @staticmethod