--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tutorial/bus-network.cc	Tue Oct 09 21:54:03 2007 -0700
@@ -0,0 +1,65 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 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
+ */
+
+#include "ns3/mac48-address.h"
+#include "ns3/csma-net-device.h"
+#include "ns3/csma-topology.h"
+#include "ns3/csma-ipv4-topology.h"
+
+#include "bus-network.h"
+#include "ipv4-address-generator.h"
+
+namespace ns3 {
+
+BusNetwork::BusNetwork (
+  Ipv4Mask      mask, 
+  Ipv4Address   network, 
+  Ipv4Address   startAddress, 
+  DataRate      bps, 
+  Time          delay, 
+  uint32_t      n) 
+{
+  Ipv4AddressGenerator::SeedNetwork (mask, network);
+  Ipv4AddressGenerator::SeedAddress (mask, startAddress);
+
+  m_channel = CsmaTopology::CreateCsmaChannel (bps, delay);
+
+  for (uint32_t i = 0; i < n; ++i)
+    {
+      Ptr<Node> node = Create<InternetNode> ();
+      uint32_t nd = CsmaIpv4Topology::AddIpv4CsmaNetDevice (node, m_channel, 
+        Mac48Address::Allocate ());
+      Ipv4Address address = Ipv4AddressGenerator::AllocateAddress (mask, 
+        network);
+      CsmaIpv4Topology::AddIpv4Address (node, nd, address, mask);
+      m_nodes.push_back (node);
+    }
+}
+
+BusNetwork::~BusNetwork ()
+{
+  m_nodes.erase (m_nodes.begin (), m_nodes.end ());
+}
+
+  Ptr<Node>
+BusNetwork::GetNode (uint32_t n)
+{
+  return m_nodes[n];
+}
+
+}; // namespace ns3