# /*

#  * 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

#  *

#  */

# 

#  This ns-3 example demonstrates the use of helper functions to ease 

#  the construction of simulation scenarios.  

#  

#  The simulation topology consists of a mixed wired and wireless

#  scenario in which a hierarchical mobility model is used.

# 

#  The simulation layout consists of N backbone routers interconnected

#  by an ad hoc wifi network.

#  Each backbone router also has a local 802.11 network and is connected

#  to a local LAN.  An additional set of(K-1) nodes are connected to

#  this backbone.  Finally, a local LAN is connected to each router

#  on the backbone, with L-1 additional hosts.  

# 

#  The nodes are populated with TCP/IP stacks, and OLSR unicast routing

#  on the backbone.  An example UDP transfer is shown.  The simulator

#  be configured to output tcpdumps or traces from different nodes.

# 

# 

#           +--------------------------------------------------------+

#           |                                                        |

#           |              802.11 ad hoc, ns-2 mobility              | 

#           |                                                        |

#           +--------------------------------------------------------+

#                    |       o o o(N backbone routers)       |

#                +--------+                               +--------+

#      wired LAN | mobile |                     wired LAN | mobile |

#     -----------| router |                    -----------| router |

#                ---------                                ---------

#                    |                                        |

#           +----------------+                       +----------------+

#           |     802.11     |                       |     802.11     |

#           |      net       |                       |       net      |

#           |   K-1 hosts    |                       |   K-1 hosts    |

#           +----------------+                       +----------------+

# 

import ns3

# # 

# #  This function will be used below as a trace sink

# #  

# static void

# CourseChangeCallback(std.string path, Ptr<const MobilityModel> model)

# {

#   Vector position = model.GetPosition();

#   std.cout << "CourseChange " << path << " x=" << position.x << ", y=" << position.y << ", z=" << position.z << std.endl;

# }

def main(argv): 

    # 

    #  First, we declare and initialize a few local variables that control some 

    #  simulation parameters.

    # 

    backboneNodes = 10

    infraNodes = 5

    lanNodes = 5

    stopTime = 10

    # 

    #  Simulation defaults are typically set next, before command line

    #  arguments are parsed.

    # 

    ns3.Config.SetDefault("ns3::OnOffApplication::PacketSize", ns3.StringValue("210"))

    ns3.Config.SetDefault("ns3::OnOffApplication::DataRate", ns3.StringValue("448kb/s"))

    # 

    #  For convenience, we add the local variables to the command line argument

    #  system so that they can be overridden with flags such as 

    #  "--backboneNodes=20"

    # 

    cmd = ns3.CommandLine()

    #cmd.AddValue("backboneNodes", "number of backbone nodes", backboneNodes)

    #cmd.AddValue("infraNodes", "number of leaf nodes", infraNodes)

    #cmd.AddValue("lanNodes", "number of LAN nodes", lanNodes)

    #cmd.AddValue("stopTime", "simulation stop time(seconds)", stopTime)

    # 

    #  The system global variables and the local values added to the argument

    #  system can be overridden by command line arguments by using this call.

    # 

    cmd.Parse(argv)

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #                                                                        # 

    #  Construct the backbone                                                # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    # 

    #  Create a container to manage the nodes of the adhoc(backbone) network.

    #  Later we'll create the rest of the nodes we'll need.

    # 

    backbone = ns3.NodeContainer()

    backbone.Create(backboneNodes)

    # 

    #  Create the backbone wifi net devices and install them into the nodes in 

    #  our container

    # 

    wifi = ns3.WifiHelper()

    wifi.SetMac("ns3::AdhocWifiMac")

    wifi.SetPhy("ns3::WifiPhy")

    backboneDevices = wifi.Install(backbone)

    # 

    #  Add the IPv4 protocol stack to the nodes in our container

    # 

    internet = ns3.InternetStackHelper()

    internet.Install(backbone)

    # 

    #  Assign IPv4 addresses to the device drivers(actually to the associated

    #  IPv4 interfaces) we just created.

    # 

    ipAddrs = ns3.Ipv4AddressHelper()

    ipAddrs.SetBase(ns3.Ipv4Address("192.168.0.0"), ns3.Ipv4Mask("255.255.255.0"))

    ipAddrs.Assign(backboneDevices)

    # 

    #  The ad-hoc network nodes need a mobility model so we aggregate one to 

    #  each of the nodes we just finished building.  

    # 

    mobility = ns3.MobilityHelper()

    positionAlloc = ns3.ListPositionAllocator()

    x = 0.0

    for i in range(backboneNodes):

        positionAlloc.Add(ns3.Vector(x, 0.0, 0.0))

        x += 5.0

    mobility.SetPositionAllocator(positionAlloc)

    mobility.SetMobilityModel("ns3::RandomDirection2dMobilityModel",

                               "Bounds", ns3.RectangleValue(ns3.Rectangle(0, 1000, 0, 1000)),

                               "Speed", ns3.RandomVariableValue(ns3.ConstantVariable(2000)),

                               "Pause", ns3.RandomVariableValue(ns3.ConstantVariable(0.2)))

    mobility.Install(backbone)

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #                                                                        # 

    #  Construct the LANs                                                    # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #  Reset the address base-- all of the CSMA networks will be in

    #  the "172.16 address space

    ipAddrs.SetBase(ns3.Ipv4Address("172.16.0.0"), ns3.Ipv4Mask("255.255.255.0"))

    for i in range(backboneNodes):

        print "Configuring local area network for backbone node ", i

        # 

        #  Create a container to manage the nodes of the LAN.  We need

        #  two containers here; one with all of the new nodes, and one

        #  with all of the nodes including new and existing nodes

        # 

        newLanNodes = ns3.NodeContainer()

        newLanNodes.Create(lanNodes - 1)

        #  Now, create the container with all nodes on this link

        lan = ns3.NodeContainer(ns3.NodeContainer(backbone.Get(i)), newLanNodes)

        # 

        #  Create the CSMA net devices and install them into the nodes in our 

        #  collection.

        # 

        csma = ns3.CsmaHelper()

        csma.SetChannelAttribute("DataRate", ns3.DataRateValue(ns3.DataRate(5000000)))

        csma.SetChannelAttribute("Delay", ns3.TimeValue(ns3.MilliSeconds(2)))

        lanDevices = csma.Install(lan)

        # 

        #  Add the IPv4 protocol stack to the new LAN nodes

        # 

        internet.Install(newLanNodes)

        # 

        #  Assign IPv4 addresses to the device drivers(actually to the 

        #  associated IPv4 interfaces) we just created.

        # 

        ipAddrs.Assign(lanDevices)

        # 

        #  Assign a new network prefix for the next LAN, according to the

        #  network mask initialized above

        # 

        ipAddrs.NewNetwork()

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #                                                                        # 

    #  Construct the mobile networks                                         # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #  Reset the address base-- all of the 802.11 networks will be in

    #  the "10.0" address space

    ipAddrs.SetBase(ns3.Ipv4Address("10.0.0.0"), ns3.Ipv4Mask("255.255.255.0"))

    for i in range(backboneNodes):

        print "Configuring wireless network for backbone node ", i

        # 

        #  Create a container to manage the nodes of the LAN.  We need

        #  two containers here; one with all of the new nodes, and one

        #  with all of the nodes including new and existing nodes

        # 

        newInfraNodes = ns3.NodeContainer()

        newInfraNodes.Create(infraNodes - 1)

        #  Now, create the container with all nodes on this link

        infra = ns3.NodeContainer(ns3.NodeContainer(backbone.Get(i)), newInfraNodes)

        # 

        #  Create another ad hoc network and devices

        # 

        wifiInfra = ns3.WifiHelper()

        wifiInfra.SetMac("ns3::AdhocWifiMac")

        wifiInfra.SetPhy("ns3::WifiPhy")

        infraDevices = wifiInfra.Install(infra)

        #  Add the IPv4 protocol stack to the nodes in our container

        # 

        internet.Install(newInfraNodes)

        # 

        #  Assign IPv4 addresses to the device drivers(actually to the associated

        #  IPv4 interfaces) we just created.

        # 

        ipAddrs.Assign(infraDevices)

        # 

        #  Assign a new network prefix for each mobile network, according to 

        #  the network mask initialized above

        # 

        ipAddrs.NewNetwork()

        # 

        #  The new wireless nodes need a mobility model so we aggregate one 

        #  to each of the nodes we just finished building.

        # 

        subnetAlloc = ns3.ListPositionAllocator()

        for j in range(infra.GetN()):

            subnetAlloc.Add(ns3.Vector(0.0, j, 0.0))

        mobility.PushReferenceMobilityModel(backbone.Get(i))

        mobility.SetPositionAllocator(subnetAlloc)

        mobility.SetMobilityModel("ns3::RandomDirection2dMobilityModel",

                                  "Bounds", ns3.RectangleValue(ns3.Rectangle(-25, 25, -25, 25)),

                                  "Speed", ns3.RandomVariableValue(ns3.ConstantVariable(30)),

                                  "Pause", ns3.RandomVariableValue(ns3.ConstantVariable(0.4)))

        mobility.Install(infra)

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #                                                                        # 

    #  Routing configuration                                                 # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    print "Enabling OLSR routing on all backbone nodes"

    olsr = ns3.OlsrHelper()

    olsr.Install(backbone)

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #                                                                        # 

    #  Application configuration                                             # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #  Create the OnOff application to send UDP datagrams of size

    #  210 bytes at a rate of 448 Kb/s, between two nodes

    print "Create Applications."

    port = 9   #  Discard port(RFC 863)

    #  Let's make sure that the user does not define too few LAN nodes

    #  to make this example work.  We need lanNodes >= 5

    assert (lanNodes >= 5)

    appSource = ns3.NodeList.GetNode(11)

    appSink = ns3.NodeList.GetNode(13)

    remoteAddr = ns3.Ipv4Address("172.16.0.5")

    onoff = ns3.OnOffHelper("ns3::UdpSocketFactory", 

                            ns3.Address(ns3.InetSocketAddress(remoteAddr, port)))

    onoff.SetAttribute("OnTime", ns3.RandomVariableValue(ns3.ConstantVariable(1)))

    onoff.SetAttribute("OffTime", ns3.RandomVariableValue(ns3.ConstantVariable(0)))

    apps = onoff.Install(ns3.NodeContainer(appSource))

    apps.Start(ns3.Seconds(3.0))

    apps.Stop(ns3.Seconds(20.0))

    #  Create a packet sink to receive these packets

    sink = ns3.PacketSinkHelper("ns3::UdpSocketFactory", 

                                ns3.InetSocketAddress(ns3.Ipv4Address.GetAny(), port))

    apps = sink.Install(ns3.NodeContainer(appSink))

    apps.Start(ns3.Seconds(3.0))

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    #                                                                        # 

    #  Tracing configuration                                                 # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # / 

    print "Configure Tracing."

    # 

    #  Let's set up some ns-2-like ascii traces, using another helper class

    # 

    #std.ofstream ascii

    #ascii.open("mixed-wireless.tr")

    #WifiHelper.EnableAsciiAll(ascii)

    #CsmaHelper.EnableAsciiAll(ascii)

    print "(tracing not done for Python)"

    #  Look at nodes 11, 13 only

    # WifiHelper.EnableAscii(ascii, 11, 0); 

    # WifiHelper.EnableAscii(ascii, 13, 0); 

    #  Let's do a pcap trace on the backbone devices

    ns3.WifiHelper.EnablePcap("mixed-wireless", backboneDevices)

    #  Let's additionally trace the application Sink, ifIndex 0

    ns3.CsmaHelper.EnablePcap("mixed-wireless", appSink.GetId(), 0)

#   #ifdef ENABLE_FOR_TRACING_EXAMPLE

#     Config.Connect("/NodeList/*/$MobilityModel/CourseChange",

#       MakeCallback(&CourseChangeCallback))

#   #endif

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #  

    #                                                                        # 

    #  Run simulation                                                        # 

    #                                                                        # 

    # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #  

    print "Run Simulation."

    ns3.Simulator.Stop(ns3.Seconds(stopTime))

    ns3.Simulator.Run()

    ns3.Simulator.Destroy()

if __name__ == '__main__':

    import sys

    main(sys.argv)