--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/devices/csma/examples/csma-star.cc Thu Mar 03 19:54:57 2011 +0000
@@ -0,0 +1,195 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * 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
+ *
+ */
+
+#include "ns3/core-module.h"
+#include "ns3/network-module.h"
+#include "ns3/helper-module.h"
+#include "ns3/csma-star-helper.h"
+#include "ns3/applications-module.h"
+#include "ns3/csma-module.h"
+#include "ns3/ipv4-global-routing-helper.h"
+
+// Network topology (default)
+//
+// n2 + + n3 .
+// | ... |\ /| ... | .
+// ======= \ / ======= .
+// CSMA \ / CSMA .
+// \ / .
+// n1 +--- n0 ---+ n4 .
+// | ... | / \ | ... | .
+// ======= / \ ======= .
+// CSMA / \ CSMA .
+// / \ .
+// n6 + + n5 .
+// | ... | | ... | .
+// ======= ======= .
+// CSMA CSMA .
+//
+
+using namespace ns3;
+
+NS_LOG_COMPONENT_DEFINE ("CsmaStar");
+
+int
+main (int argc, char *argv[])
+{
+
+ //
+ // Set up some default values for the simulation.
+ //
+ Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (137));
+
+ // ??? try and stick 15kb/s into the data rate
+ Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("14kb/s"));
+
+ //
+ // Default number of nodes in the star. Overridable by command line argument.
+ //
+ uint32_t nSpokes = 7;
+
+ CommandLine cmd;
+ cmd.AddValue("nSpokes", "Number of spoke nodes to place in the star", nSpokes);
+ cmd.Parse (argc, argv);
+
+ NS_LOG_INFO ("Build star topology.");
+ CsmaHelper csma;
+ csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps"));
+ csma.SetChannelAttribute ("Delay", StringValue ("1ms"));
+ CsmaStarHelper star (nSpokes, csma);
+
+ NodeContainer fillNodes;
+
+ //
+ // Just to be nasy, hang some more nodes off of the CSMA channel for each
+ // spoke, so that there are a total of 16 nodes on each channel. Stash
+ // all of these new devices into a container.
+ //
+ NetDeviceContainer fillDevices;
+
+ uint32_t nFill = 14;
+ for (uint32_t i = 0; i < star.GetSpokeDevices ().GetN (); ++i)
+ {
+ Ptr<Channel> channel = star.GetSpokeDevices ().Get (i)->GetChannel ();
+ Ptr<CsmaChannel> csmaChannel = channel->GetObject<CsmaChannel> ();
+ NodeContainer newNodes;
+ newNodes.Create (nFill);
+ fillNodes.Add (newNodes);
+ fillDevices.Add (csma.Install (newNodes, csmaChannel));
+ }
+
+ NS_LOG_INFO ("Install internet stack on all nodes.");
+ InternetStackHelper internet;
+ star.InstallStack (internet);
+ internet.Install (fillNodes);
+
+ NS_LOG_INFO ("Assign IP Addresses.");
+ star.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.0.0", "255.255.255.0"));
+
+ //
+ // We assigned addresses to the logical hub and the first "drop" of the
+ // CSMA network that acts as the spoke, but we also have a number of fill
+ // devices (nFill) also hanging off the CSMA network. We have got to
+ // assign addresses to them as well. We put all of the fill devices into
+ // a single device container, so the first nFill devices are associated
+ // with the channel connected to spokeDevices.Get (0), the second nFill
+ // devices afe associated with the channel connected to spokeDevices.Get (1)
+ // etc.
+ //
+ Ipv4AddressHelper address;
+ for(uint32_t i = 0; i < star.SpokeCount (); ++i)
+ {
+ std::ostringstream subnet;
+ subnet << "10.1." << i << ".0";
+ NS_LOG_INFO ("Assign IP Addresses for CSMA subnet " << subnet.str ());
+ address.SetBase (subnet.str ().c_str (), "255.255.255.0", "0.0.0.3");
+
+ for (uint32_t j = 0; j < nFill; ++j)
+ {
+ address.Assign (fillDevices.Get (i * nFill + j));
+ }
+ }
+
+ NS_LOG_INFO ("Create applications.");
+ //
+ // Create a packet sink on the star "hub" to receive packets.
+ //
+ uint16_t port = 50000;
+ Address hubLocalAddress (InetSocketAddress (Ipv4Address::GetAny (), port));
+ PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", hubLocalAddress);
+ ApplicationContainer hubApp = packetSinkHelper.Install (star.GetHub ());
+ hubApp.Start (Seconds (1.0));
+ hubApp.Stop (Seconds (10.0));
+
+ //
+ // Create OnOff applications to send TCP to the hub, one on each spoke node.
+ //
+ OnOffHelper onOffHelper ("ns3::TcpSocketFactory", Address ());
+ onOffHelper.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
+ onOffHelper.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
+
+ ApplicationContainer spokeApps;
+
+ for (uint32_t i = 0; i < star.SpokeCount (); ++i)
+ {
+ AddressValue remoteAddress (InetSocketAddress (star.GetHubIpv4Address (i), port));
+ onOffHelper.SetAttribute ("Remote", remoteAddress);
+ spokeApps.Add (onOffHelper.Install (star.GetSpokeNode (i)));
+ }
+
+ spokeApps.Start (Seconds (1.0));
+ spokeApps.Stop (Seconds (10.0));
+
+ //
+ // Because we are evil, we also add OnOff applications to send TCP to the hub
+ // from the fill devices on each CSMA link. The first nFill nodes in the
+ // fillNodes container are on the CSMA network talking to the zeroth device
+ // on the hub node. The next nFill nodes are on the CSMA network talking to
+ // the first device on the hub node, etc. So the ith fillNode is associated
+ // with the hub address found on the (i / nFill)th device on the hub node.
+ //
+ ApplicationContainer fillApps;
+
+ for (uint32_t i = 0; i < fillNodes.GetN (); ++i)
+ {
+ AddressValue remoteAddress (InetSocketAddress (star.GetHubIpv4Address (i / nFill), port));
+ onOffHelper.SetAttribute ("Remote", remoteAddress);
+ fillApps.Add (onOffHelper.Install (fillNodes.Get (i)));
+ }
+
+ fillApps.Start (Seconds (1.0));
+ fillApps.Stop (Seconds (10.0));
+
+ NS_LOG_INFO ("Enable static global routing.");
+ //
+ // Turn on global static routing so we can actually be routed across the star.
+ //
+ Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
+
+ NS_LOG_INFO ("Enable pcap tracing.");
+ //
+ // Do pcap tracing on all devices on all nodes.
+ //
+ csma.EnablePcapAll ("csma-star", false);
+
+ NS_LOG_INFO ("Run Simulation.");
+ Simulator::Run ();
+ Simulator::Destroy ();
+ NS_LOG_INFO ("Done.");
+
+ return 0;
+}