3.22/doxygen/tap-wifi-virtual-machine_8py_source.html

# -*-  Mode: Python; -*-

#

# Copyright 2010 University of Washington

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License version 2 as

# published by the Free Software Foundation;

#

# 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.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#


import sys

import ns.core

import ns.internet

import ns.mobility

import ns.network

import ns.tap_bridge

import ns.wifi


def main(argv):

    #

    # We are interacting with the outside, real, world.  This means we have to

    # interact in real-time and therefore we have to use the real-time simulator

    # and take the time to calculate checksums.

    #

    ns.core.GlobalValue.Bind("SimulatorImplementationType", ns.core.StringValue("ns3::RealtimeSimulatorImpl"))

    ns.core.GlobalValue.Bind("ChecksumEnabled", ns.core.BooleanValue("true"))


    #

    # Create two ghost nodes.  The first will represent the virtual machine host

    # on the left side of the network; and the second will represent the VM on

    # the right side.

    #

    nodes = ns.network.NodeContainer()

    nodes.Create (2);


    #

    # We're going to use 802.11 A so set up a wifi helper to reflect that.

    #

    wifi = ns.wifi.WifiHelper.Default()

    wifi.SetStandard (ns.wifi.WIFI_PHY_STANDARD_80211a);

    wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager", "DataMode", ns.core.StringValue ("OfdmRate54Mbps"));


    #

    # No reason for pesky access points, so we'll use an ad-hoc network.

    #

    wifiMac = ns.wifi.NqosWifiMacHelper.Default()

    wifiMac.SetType ("ns3::AdhocWifiMac");


    #

    # Configure the physcial layer.

    #

    wifiChannel = ns.wifi.YansWifiChannelHelper.Default()

    wifiPhy = ns.wifi.YansWifiPhyHelper.Default()

    wifiPhy.SetChannel(wifiChannel.Create())


    #

    # Install the wireless devices onto our ghost nodes.

    #

    devices = wifi.Install(wifiPhy, wifiMac, nodes)


    #

    # We need location information since we are talking about wifi, so add a

    # constant position to the ghost nodes.

    #

    mobility = ns.mobility.MobilityHelper()

    positionAlloc = ns.mobility.ListPositionAllocator()

    positionAlloc.Add(ns.core.Vector(0.0, 0.0, 0.0))

    positionAlloc.Add(ns.core.Vector(5.0, 0.0, 0.0))

    mobility.SetPositionAllocator(positionAlloc)

    mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel")

    mobility.Install(nodes)


    #

    # Use the TapBridgeHelper to connect to the pre-configured tap devices for

    # the left side.  We go with "UseLocal" mode since the wifi devices do not

    # support promiscuous mode (because of their natures0.  This is a special

    # case mode that allows us to extend a linux bridge into ns-3 IFF we will

    # only see traffic from one other device on that bridge.  That is the case

    # for this configuration.

    #

    tapBridge = ns.tap_bridge.TapBridgeHelper()

    tapBridge.SetAttribute ("Mode", ns.core.StringValue ("UseLocal"));

    tapBridge.SetAttribute ("DeviceName", ns.core.StringValue ("tap-left"));

    tapBridge.Install (nodes.Get (0), devices.Get (0));


    #

    # Connect the right side tap to the right side wifi device on the right-side

    # ghost node.

    #

    tapBridge.SetAttribute ("DeviceName", ns.core.StringValue ("tap-right"));

    tapBridge.Install (nodes.Get (1), devices.Get (1));


    #

    # Run the simulation for ten minutes to give the user time to play around

    #

    ns.core.Simulator.Stop (ns.core.Seconds (600));

    ns.core.Simulator.Run(signal_check_frequency = -1)

    ns.core.Simulator.Destroy()

    return 0


if __name__ == '__main__':

    sys.exit(main(sys.argv))