--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/devices/csma/examples/csma-broadcast.cc	Thu Mar 03 19:54:57 2011 +0000
@@ -0,0 +1,127 @@
+/* -*- 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
+ */
+
+//
+// Example of the sending of a datagram to a broadcast address
+//
+// Network topology
+//     ==============
+//       |          |
+//       n0    n1   n2   
+//       |     |       
+//     ==========
+//
+//   n0 originates UDP broadcast to 255.255.255.255/discard port, which 
+//   is replicated and received on both n1 and n2
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <cassert>
+
+#include "ns3/core-module.h"
+#include "ns3/network-module.h"
+#include "ns3/helper-module.h"
+#include "ns3/csma-module.h"
+#include "ns3/applications-module.h"
+
+using namespace ns3;
+
+NS_LOG_COMPONENT_DEFINE ("CsmaBroadcastExample");
+
+int 
+main (int argc, char *argv[])
+{
+  // Users may find it convenient to turn on explicit debugging
+  // for selected modules; the below lines suggest how to do this
+#if 0
+  LogComponentEnable ("CsmaBroadcastExample", LOG_LEVEL_INFO);
+#endif
+  LogComponentEnable ("CsmaBroadcastExample", LOG_PREFIX_TIME);
+
+  // Allow the user to override any of the defaults and the above
+  // Bind()s at run-time, via command-line arguments
+  CommandLine cmd;
+  cmd.Parse (argc, argv);
+
+  NS_LOG_INFO ("Create nodes.");
+  NodeContainer c;
+  c.Create (3);
+  NodeContainer c0 = NodeContainer (c.Get (0), c.Get (1));
+  NodeContainer c1 = NodeContainer (c.Get (0), c.Get (2));
+
+  NS_LOG_INFO ("Build Topology.");
+  CsmaHelper csma;
+  csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(5000000)));
+  csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds(2)));
+
+  NetDeviceContainer n0 = csma.Install (c0);
+  NetDeviceContainer n1 = csma.Install (c1);
+
+  InternetStackHelper internet;
+  internet.Install (c);
+
+  NS_LOG_INFO ("Assign IP Addresses.");
+  Ipv4AddressHelper ipv4;
+  ipv4.SetBase ("10.1.0.0", "255.255.255.0");
+  ipv4.Assign (n0);
+  ipv4.SetBase ("192.168.1.0", "255.255.255.0");
+  ipv4.Assign (n1);
+
+
+  // RFC 863 discard port ("9") indicates packet should be thrown away
+  // by the system.  We allow this silent discard to be overridden
+  // by the PacketSink application.
+  uint16_t port = 9;
+
+  // Create the OnOff application to send UDP datagrams of size
+  // 512 bytes (default) at a rate of 500 Kb/s (default) from n0
+  NS_LOG_INFO ("Create Applications.");
+  OnOffHelper onoff ("ns3::UdpSocketFactory", 
+    Address (InetSocketAddress (Ipv4Address ("255.255.255.255"), port)));
+  onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
+  onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
+
+  ApplicationContainer app = onoff.Install (c0.Get (0));
+  // Start the application
+  app.Start (Seconds (1.0));
+  app.Stop (Seconds (10.0));
+  
+  // Create an optional packet sink to receive these packets
+  PacketSinkHelper sink ("ns3::UdpSocketFactory",
+    Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
+  app = sink.Install (c0.Get (1));
+  app.Add (sink.Install (c1.Get (1)));
+  app.Start (Seconds (1.0));
+  app.Stop (Seconds (10.0));
+
+  // Configure ascii tracing of all enqueue, dequeue, and NetDevice receive 
+  // events on all devices.  Trace output will be sent to the file 
+  // "csma-one-subnet.tr"
+  AsciiTraceHelper ascii;
+  csma.EnableAsciiAll (ascii.CreateFileStream ("csma-broadcast.tr"));
+
+  // Also configure some tcpdump traces; each interface will be traced
+  // The output files will be named 
+  // csma-broadcast-<nodeId>-<interfaceId>.pcap
+  // and can be read by the "tcpdump -tt -r" command 
+  csma.EnablePcapAll ("csma-broadcast", false);
+
+  NS_LOG_INFO ("Run Simulation.");
+  Simulator::Run ();    
+  Simulator::Destroy ();
+  NS_LOG_INFO ("Done.");
+}