--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/csma-helper.cc	Thu Mar 13 14:24:45 2008 -0700
@@ -0,0 +1,68 @@
+#include "csma-helper.h"
+#include "ns3/object-factory.h"
+#include "ns3/queue.h"
+#include "ns3/csma-net-device.h"
+#include "ns3/csma-channel.h"
+#include <string>
+
+namespace ns3 {
+
+CsmaHelper::CsmaHelper ()
+{
+  m_queueFactory.SetTypeId ("ns3::DropTailQueue");
+  m_deviceFactory.SetTypeId ("ns3::CsmaNetDevice");
+  m_channelFactory.SetTypeId ("ns3::CsmaChannel");
+}
+
+void 
+CsmaHelper::SetQueue (std::string type,
+		      std::string n1, Attribute v1,
+		      std::string n2, Attribute v2,
+		      std::string n3, Attribute v3,
+		      std::string n4, Attribute v4)
+{
+  m_queueFactory.SetTypeId (type);
+  m_queueFactory.Set (n1, v1);
+  m_queueFactory.Set (n2, v2);
+  m_queueFactory.Set (n3, v3);
+  m_queueFactory.Set (n4, v4);
+}
+
+void 
+CsmaHelper::SetDeviceParameter (std::string n1, Attribute v1)
+{
+  m_deviceFactory.Set (n1, v1);
+}
+
+void 
+CsmaHelper::SetChannelParameter (std::string n1, Attribute v1)
+{
+  m_channelFactory.Set (n1, v1);
+}
+
+NetDeviceContainer 
+CsmaHelper::Build (const NodeContainer &c)
+{
+  Ptr<CsmaChannel> channel = m_channelFactory.Create ()->GetObject<CsmaChannel> ();
+  return Build (c, channel);
+}
+
+NetDeviceContainer 
+CsmaHelper::Build (const NodeContainer &c, Ptr<CsmaChannel> channel)
+{
+  NetDeviceContainer container;
+  for (NodeContainer::Iterator i = c.Begin (); i != c.End (); i++)
+    {
+      Ptr<Node> node = *i;
+      Ptr<CsmaNetDevice> device = m_deviceFactory.Create<CsmaNetDevice> ();
+      node->AddDevice (device);
+      Ptr<Queue> queue = m_queueFactory.Create<Queue> ();
+      device->AddQueue (queue);
+      device->Attach (channel);
+      container.Add (device);
+    }
+  return container;
+}
+
+
+} // namespace ns3