From 8c662d63bf0266c295e7d808753ef00059b449d2 Mon Sep 17 00:00:00 2001
From: Brian O'Connor <bocon@onlab.us>
Date: Tue, 3 Jan 2017 15:11:38 -0800
Subject: [PATCH] Updating Mininet to start with host IP request in ipBase

---
 mininet/net.py  | 3 ++-
 mininet/util.py | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/mininet/net.py b/mininet/net.py
index 8acba20..df62c82 100755
--- a/mininet/net.py
+++ b/mininet/net.py
@@ -144,7 +144,8 @@ class Mininet( object ):
         self.intf = intf
         self.ipBase = ipBase
         self.ipBaseNum, self.prefixLen = netParse( self.ipBase )
-        self.nextIP = 1  # start for address allocation
+        hostIP = ( 0xffffffff >> self.prefixLen ) & self.ipBaseNum
+        self.nextIP = hostIP if hostIP > 0 else 1  # start for address allocation
         self.inNamespace = inNamespace
         self.xterms = xterms
         self.cleanup = cleanup
diff --git a/mininet/util.py b/mininet/util.py
index c44627a..8140d70 100644
--- a/mininet/util.py
+++ b/mininet/util.py
@@ -321,7 +321,7 @@ def ipParse( ip ):
     "Parse an IP address and return an unsigned int."
     args = [ int( arg ) for arg in ip.split( '.' ) ]
     while len(args) < 4:
-        args.append( 0 )
+        args.insert( len(args) - 1, 0 )
     return ipNum( *args )
 
 def netParse( ipstr ):