diff --git a/common/frameio/third_party/oftest/netutils.py b/common/frameio/third_party/oftest/netutils.py
new file mode 100644
index 0000000..4d2ec8f
--- /dev/null
+++ b/common/frameio/third_party/oftest/netutils.py
@@ -0,0 +1,60 @@
+"""
+Network utilities for the OpenFlow test framework
+"""
+
+###########################################################################
+##                                                                         ##
+## Promiscuous mode enable/disable                                         ##
+##                                                                         ##
+## Based on code from Scapy by Phillippe Biondi                            ##
+##                                                                         ##
+##                                                                         ##
+## This program is free software; you can redistribute it and/or modify it ##
+## under the terms of the GNU General Public License as published by the   ##
+## Free Software Foundation; either version 2, or (at your option) any     ##
+## later version.                                                          ##
+##                                                                         ##
+## This program is distributed in the hope that it will be useful, but     ##
+## WITHOUT ANY WARRANTY; without even the implied warranty of              ##
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU       ##
+## General Public License for more details.                                ##
+##                                                                         ##
+#############################################################################
+
+import socket
+from fcntl import ioctl
+import struct
+
+# From net/if_arp.h
+ARPHDR_ETHER = 1
+ARPHDR_LOOPBACK = 772
+
+# From bits/ioctls.h
+SIOCGIFHWADDR  = 0x8927          # Get hardware address
+SIOCGIFINDEX   = 0x8933          # name -> if_index mapping
+
+# From netpacket/packet.h
+PACKET_ADD_MEMBERSHIP  = 1
+PACKET_DROP_MEMBERSHIP = 2
+PACKET_MR_PROMISC      = 1
+
+# From bits/socket.h
+SOL_PACKET = 263
+
+def get_if(iff,cmd):
+  s=socket.socket()
+  ifreq = ioctl(s, cmd, struct.pack("16s16x",iff))
+  s.close()
+  return ifreq
+
+def get_if_index(iff):
+  return int(struct.unpack("I",get_if(iff, SIOCGIFINDEX)[16:20])[0])
+
+def set_promisc(s,iff,val=1):
+  mreq = struct.pack("IHH8s", get_if_index(iff), PACKET_MR_PROMISC, 0, "")
+  if val:
+      cmd = PACKET_ADD_MEMBERSHIP
+  else:
+      cmd = PACKET_DROP_MEMBERSHIP
+  s.setsockopt(SOL_PACKET, cmd, mreq)
+