# -*-  Mode: Python; -*-

 #  Copyright (c) 2009 INESC Porto

 # 

 #  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

 # 

 #  Authors: Gustavo Carneiro <gjc@inescporto.pt>

 import sys

 import ns3

 DISTANCE = 150 # (m)

 NUM_NODES_SIDE = 3

 def main(argv):

     cmd = ns3.CommandLine()

     cmd.Viz = None

     cmd.AddValue("Viz", "Enable visualizer")

     cmd.NumNodesSide = None

     cmd.AddValue("NumNodesSide", "Grid side number of nodes (total number of nodes will be this number squared)")

     cmd.Results = None

     cmd.AddValue("Results", "Write XML results to file")

     cmd.Parse(argv)

     ns3.RandomVariable.UseGlobalSeed(1, 1, 2, 3, 5, 8)

     #ns3.Config.SetDefault("ns3::Ipv4L3Protocol::CalcChecksum", ns3.BooleanValue(True))

     channel = ns3.WifiChannel()

     channel.SetPropagationDelayModel(ns3.ConstantSpeedPropagationDelayModel())

     log = ns3.LogDistancePropagationLossModel()

     log.SetReferenceModel(ns3.FriisPropagationLossModel())

     channel.SetPropagationLossModel(log)

     wifi = ns3.WifiHelper()

     wifi.SetMac("ns3::AdhocWifiMac")

     wifi.SetPhy("ns3::WifiPhy");

     wifi.SetRemoteStationManager ("ns3::ArfWifiManager");

     internet = ns3.InternetStackHelper()

     ipv4Addresses = ns3.Ipv4AddressHelper()

     ipv4Addresses.SetBase(ns3.Ipv4Address("10.0.0.0"), ns3.Ipv4Mask("255.255.255.255"))

     olsrHelper = ns3.OlsrHelper()

     port = 9   # Discard port(RFC 863)

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

                                   ns3.Address(ns3.InetSocketAddress(ns3.Ipv4Address("10.0.0.1"), port)))

     onOffHelper.SetAttribute("DataRate", ns3.DataRateValue(ns3.DataRate("100kbps")))

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

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

     addresses = []

     nodes = []

     if cmd.NumNodesSide is None:

         num_nodes_side = NUM_NODES_SIDE

     else:

         num_nodes_side = int(cmd.NumNodesSide)

     for xi in range(num_nodes_side):

         for yi in range(num_nodes_side):

             node = ns3.Node()

             nodes.append(node)

             internet.Install(ns3.NodeContainer(node))

             mobility = ns3.StaticMobilityModel()

             mobility.SetPosition(ns3.Vector(xi*DISTANCE, yi*DISTANCE, 0))

             node.AggregateObject(mobility)

             devices = wifi.Install(ns3.NodeContainer(node), channel)

             ipv4_interfaces = ipv4Addresses.Assign(devices)

             addresses.append(ipv4_interfaces.GetAddress(0))

             olsrHelper.Install(ns3.NodeContainer(node))

     for i, node in enumerate(nodes):

         destaddr = addresses[(len(addresses) - 1 - i) % len(addresses)]

         #print i, destaddr

         onOffHelper.SetAttribute("Remote", ns3.AddressValue(ns3.InetSocketAddress(destaddr, port)))

         app = onOffHelper.Install(ns3.NodeContainer(node))

         app.Start(ns3.Seconds(ns3.UniformVariable(20, 30).GetValue()))

     #internet.EnablePcapAll("wifi-olsr")

     flowmon_helper = ns3.FlowMonitorHelper()

     #flowmon_helper.SetMonitorAttribute("StartTime", ns3.TimeValue(ns3.Seconds(31)))

     monitor = flowmon_helper.InstallAll()

     monitor.SetAttribute("DelayBinWidth", ns3.DoubleValue(0.001))

     monitor.SetAttribute("JitterBinWidth", ns3.DoubleValue(0.001))

     monitor.SetAttribute("PacketSizeBinWidth", ns3.DoubleValue(20))

     ns3.Simulator.Stop(ns3.Seconds(44.0))

     if cmd.Viz is not None:

         import visualizer

         visualizer.start()

     else:

         ns3.Simulator.Run()

     def print_stats(os, st):

         print >> os, "  Tx Bytes: ", st.txBytes

         print >> os, "  Rx Bytes: ", st.rxBytes

         print >> os, "  Tx Packets: ", st.txPackets

         print >> os, "  Rx Packets: ", st.rxPackets

         print >> os, "  Lost Packets: ", st.lostPackets

         if st.rxPackets > 0:

             print >> os, "  Mean{Delay}: ", (st.delaySum.GetSeconds() / st.rxPackets)

 	    print >> os, "  Mean{Jitter}: ", (st.jitterSum.GetSeconds() / (st.rxPackets-1))

             print >> os, "  Mean{Hop Count}: ", float(st.timesForwarded) / st.rxPackets + 1

         if 1:

             print >> os, "Delay Histogram"

             for i in range(st.delayHistogram.GetNBins () ):

               print >> os, " ",i,"(", st.delayHistogram.GetBinStart (i), "-", \

                   st.delayHistogram.GetBinEnd (i), "): ", st.delayHistogram.GetBinCount (i)

             print >> os, "Jitter Histogram"

             for i in range(st.jitterHistogram.GetNBins () ):

               print >> os, " ",i,"(", st.jitterHistogram.GetBinStart (i), "-", \

                   st.jitterHistogram.GetBinEnd (i), "): ", st.jitterHistogram.GetBinCount (i)

             print >> os, "PacketSize Histogram"

             for i in range(st.packetSizeHistogram.GetNBins () ):

               print >> os, " ",i,"(", st.packetSizeHistogram.GetBinStart (i), "-", \

                   st.packetSizeHistogram.GetBinEnd (i), "): ", st.packetSizeHistogram.GetBinCount (i)

         for reason, drops in enumerate(st.packetsDropped):

             print "  Packets dropped by reason %i: %i" % (reason, drops)

         #for reason, drops in enumerate(st.bytesDropped):

         #    print "Bytes dropped by reason %i: %i" % (reason, drops)

     monitor.CheckForLostPackets()

     classifier = flowmon_helper.GetClassifier()

     if cmd.Results is None:

         for flow_id, flow_stats in monitor.GetFlowStats():

             t = classifier.FindFlow(flow_id)

             proto = {6: 'TCP', 17: 'UDP'} [t.protocol]

             print "FlowID: %i (%s %s/%s --> %s/%i)" % \

                 (flow_id, proto, t.sourceAddress, t.sourcePort, t.destinationAddress, t.destinationPort)

             print_stats(sys.stdout, flow_stats)

     else:

         print monitor.SerializeToXmlFile(cmd.Results, True, True)

     return 0

 if __name__ == '__main__':

     sys.exit(main(sys.argv))