checkpoint
authorCraig Dowell <craigdo@ee.washington.edu>
Fri, 22 Jan 2010 00:58:01 -0800
changeset 6013 fa3ab7f34eb2
parent 6012 4756711e6676
child 6014 d251d4a44fde
checkpoint
examples/routing/dynamic-global-routing.cc
examples/routing/mixed-global-routing.cc
src/devices/emu/emu-net-device.h
src/devices/point-to-point/point-to-point-net-device.h
src/helper/ascii-trace-helper.cc
src/helper/ascii-trace-helper.h
src/helper/ascii-trace-user-helper-for-device.cc
src/helper/ascii-trace-user-helper-for-device.h
src/helper/ascii-trace-user-helper-for-ipv4.cc
src/helper/ascii-trace-user-helper-for-ipv4.h
src/helper/ascii-trace-user-helper.cc
src/helper/ascii-trace-user-helper.h
src/helper/csma-helper.cc
src/helper/csma-helper.h
src/helper/emu-helper.cc
src/helper/emu-helper.h
src/helper/internet-stack-helper.cc
src/helper/internet-stack-helper.h
src/helper/ipv4-interface-container.cc
src/helper/ipv4-interface-container.h
src/helper/node-container.h
src/helper/pcap-helper.cc
src/helper/pcap-helper.h
src/helper/pcap-user-helper-for-device.cc
src/helper/pcap-user-helper-for-device.h
src/helper/pcap-user-helper-for-ipv4.cc
src/helper/pcap-user-helper-for-ipv4.h
src/helper/pcap-user-helper.cc
src/helper/pcap-user-helper.h
src/helper/point-to-point-helper.cc
src/helper/point-to-point-helper.h
src/helper/wscript
src/helper/yans-wifi-helper.cc
src/helper/yans-wifi-helper.h
--- a/examples/routing/dynamic-global-routing.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/examples/routing/dynamic-global-routing.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -190,13 +190,14 @@
   apps2.Stop (Seconds (16.0));
 
 
-  std::ofstream ascii;
-  ascii.open ("dynamic-global-routing.tr", std::ios_base::binary | std::ios_base::out);
+  AsciiTraceHelper ascii;
+  Ptr<OutputStreamObject> stream = ascii.CreateFileStream ("dynamic-global-routing.tr", "w");
+  p2p.EnableAsciiAll (stream);
+  csma.EnableAsciiAll (stream);
+  internet.EnableAsciiAll (stream);
+
   p2p.EnablePcapAll ("dynamic-global-routing");
-  PointToPointHelper::EnableAsciiAll (ascii);
   csma.EnablePcapAll ("dynamic-global-routing", false);
-  CsmaHelper::EnableAsciiAll (ascii);
-  InternetStackHelper::EnableAsciiAll (ascii);
  
   Ptr<Node> n1 = c.Get (1);
   Ptr<Ipv4> ipv41 = n1->GetObject<Ipv4> ();
--- a/examples/routing/mixed-global-routing.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/examples/routing/mixed-global-routing.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -120,13 +120,13 @@
   apps.Start (Seconds (1.0));
   apps.Stop (Seconds (10.0));
 
-  std::ofstream ascii;
-  ascii.open ("mixed-global-routing.tr");
+  AsciiTraceHelper ascii;
+  Ptr<OutputStreamObject> stream = ascii.CreateFileStream ("mixed-global-routing.tr", "w");
+  p2p.EnableAsciiAll (stream);
+  csma,EnableAsciiAll (stream);
+
   p2p.EnablePcapAll ("mixed-global-routing");
-  PointToPointHelper::EnableAsciiAll (ascii);
   csma.EnablePcapAll ("mixed-global-routing", false);
-  CsmaHelper::EnableAsciiAll (ascii);
-
 
   NS_LOG_INFO ("Run Simulation.");
   Simulator::Run ();
--- a/src/devices/emu/emu-net-device.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/devices/emu/emu-net-device.h	Fri Jan 22 00:58:01 2010 -0800
@@ -104,6 +104,14 @@
    */
   void SetQueue (Ptr<Queue> queue);
 
+  /**
+   * Get a copy of the attached Queue.
+   *
+   * @returns Ptr to the queue.
+   */
+  Ptr<Queue> GetQueue(void) const; 
+
+
 //
 // Pure virtual methods inherited from NetDevice we must implement.
 //
@@ -219,16 +227,6 @@
   std::string FindCreator (std::string creatorName);
 
   /**
-   * Get a copy of the attached Queue.
-   *
-   * This method is provided for any derived class that may need to get
-   * direct access to the underlying queue.
-   *
-   * @returns Ptr to the queue.
-   */
-  Ptr<Queue> GetQueue(void) const; 
-
-  /**
    * Spin up the device
    */
   void StartDevice (void);
--- a/src/devices/point-to-point/point-to-point-net-device.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/devices/point-to-point/point-to-point-net-device.h	Fri Jan 22 00:58:01 2010 -0800
@@ -108,6 +108,13 @@
   void SetQueue (Ptr<Queue> queue);
 
   /**
+   * Get a copy of the attached Queue.
+   *
+   * @returns Ptr to the queue.
+   */
+  Ptr<Queue> GetQueue(void) const; 
+
+  /**
    * Attach a receive ErrorModel to the PointToPointNetDevice.
    *
    * The PointToPointNetDevice may optionally include an ErrorModel in
@@ -261,16 +268,6 @@
 
   virtual void DoDispose (void);
 
-  /**
-   * Get a copy of the attached Queue.
-   *
-   * This method is provided for any derived class that may need to get
-   * direct access to the underlying queue.
-   *
-   * @returns Ptr to the queue.
-   */
-  Ptr<Queue> GetQueue(void) const; 
-
 private:
   /**
    * Calculate the value for the MTU that would result from 
--- a/src/helper/ascii-trace-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/ascii-trace-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -74,7 +74,7 @@
 }
 
 std::string
-AsciiTraceHelper::GetFilename (std::string prefix, Ptr<NetDevice> device, bool useObjectNames)
+AsciiTraceHelper::GetFilenameFromDevice (std::string prefix, Ptr<NetDevice> device, bool useObjectNames)
 {
   NS_LOG_FUNCTION (prefix << device << useObjectNames);
   NS_ABORT_MSG_UNLESS (prefix.size (), "Empty prefix string");
@@ -99,7 +99,7 @@
     }
   else
     {
-      oss << node->GetId ();
+      oss << "n" << node->GetId ();
     }
 
   oss << "-";
@@ -110,7 +110,7 @@
     }
   else
     {
-      oss << device->GetIfIndex ();
+      oss << "d" << device->GetIfIndex ();
     }
 
   oss << ".tr";
@@ -118,11 +118,46 @@
   return oss.str ();
 }
 
+std::string
+AsciiTraceHelper::GetFilenameFromInterfacePair (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface, bool useObjectNames)
+{
+  NS_LOG_FUNCTION (prefix << ipv4 << interface << useObjectNames);
+  NS_ABORT_MSG_UNLESS (prefix.size (), "Empty prefix string");
+
+  std::ostringstream oss;
+  oss << prefix << "-";
+
+  std::string ipv4name;
+  std::string nodename;
+
+  Ptr<Node> node = ipv4->GetObject<Node> ();
+
+  if (useObjectNames)
+    {
+      ipv4name = Names::FindName (ipv4);
+      nodename = Names::FindName (node);
+    }
+
+  if (ipv4name.size ())
+    {
+      oss << ipv4name;
+    }
+  else if (nodename.size ())
+    {
+      oss << nodename;
+    }
+  else
+    {
+      oss << "n" << node->GetId ();
+    }
+
+  oss << "-i" << interface << ".tr";
+
+  return oss.str ();
+}
+
 //
-// The basic default trace sinks.  Ascii traces are collected for four 
-// operations:
-//
-// Enqueue:
+// One of the basic default trace sink sets.  Enqueue:
 //
 //   When a packet has been sent to a device for transmission, the device is
 //   expected to place the packet onto a transmit queue even if it does not
@@ -132,7 +167,22 @@
 //   This is typically implemented by hooking the "TxQueue/Enqueue" trace hook
 //   in the device (actually the Queue in the device).
 //
-// Drop:
+void
+AsciiTraceHelper::DefaultEnqueueSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "+ " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
+}
+
+void
+AsciiTraceHelper::DefaultEnqueueSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "+ " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;
+}
+
+//
+// One of the basic default trace sink sets.  Drop:
 //
 //   When a packet has been sent to a device for transmission, the device is
 //   expected to place the packet onto a transmit queue.  If this queue is 
@@ -143,7 +193,22 @@
 //   This is typically implemented by hooking the "TxQueue/Drop" trace hook
 //   in the device (actually the Queue in the device).
 //
-// Dequeue:
+void
+AsciiTraceHelper::DefaultDropSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "d " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
+}
+
+void
+AsciiTraceHelper::DefaultDropSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "d " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;
+}
+
+//
+// One of the basic default trace sink sets.  Dequeue:
 //
 //   When a packet has been sent to a device for transmission, the device is
 //   expected to place the packet onto a transmit queue even if it does not
@@ -155,7 +220,22 @@
 //   This is typically implemented by hooking the "TxQueue/Dequeue" trace hook
 //   in the device (actually the Queue in the device).
 //
-// Receive:
+void
+AsciiTraceHelper::DefaultDequeueSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "- " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
+}
+
+void
+AsciiTraceHelper::DefaultDequeueSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "- " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;
+}
+
+//
+// One of the basic default trace sink sets.  Receive:
 //
 //   When a packet is received by a device for transmission, the device is
 //   expected to trigger this event to indicate the reception has occurred.
@@ -164,34 +244,18 @@
 //
 //   This is typically implemented by hooking the "MacRx" trace hook in the
 //   device.
-//
-
 void
-AsciiTraceHelper::DefaultEnqueueSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
-{
-  NS_LOG_FUNCTION (file << p);
-  *file->GetStream () << "+ " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
-}
-
-void
-AsciiTraceHelper::DefaultDropSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
-{
-  NS_LOG_FUNCTION (file << p);
-  *file->GetStream () << "d " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
-}
-
-void
-AsciiTraceHelper::DefaultDequeueSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
-{
-  NS_LOG_FUNCTION (file << p);
-  *file->GetStream () << "- " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
-}
-
-void
-AsciiTraceHelper::DefaultReceiveSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
+AsciiTraceHelper::DefaultReceiveSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p)
 {
   NS_LOG_FUNCTION (file << p);
   *file->GetStream () << "r " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
 }
 
+void
+AsciiTraceHelper::DefaultReceiveSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p)
+{
+  NS_LOG_FUNCTION (file << p);
+  *file->GetStream () << "r " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;
+}
+
 } // namespace ns3
--- a/src/helper/ascii-trace-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/ascii-trace-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -19,9 +19,11 @@
 #ifndef ASCII_TRACE_HELPER_H
 #define ASCII_TRACE_HELPER_H
 
+#include "ns3/assert.h"
 #include "ns3/net-device-container.h"
 #include "ns3/node-container.h"
 #include "ns3/simulator.h"
+#include "ns3/ipv4.h"
 #include "ns3/output-stream-object.h"
 
 namespace ns3 {
@@ -48,9 +50,16 @@
 
   /**
    * @brief Let the ascii trace helper figure out a reasonable filename to use
-   * for the ascii trace file.
+   * for an ascii trace file associated with a device.
    */
-  std::string GetFilename (std::string prefix, Ptr<NetDevice> device, bool useObjectNames = true);
+  std::string GetFilenameFromDevice (std::string prefix, Ptr<NetDevice> device, bool useObjectNames = true);
+
+  /**
+   * @brief Let the ascii trace helper figure out a reasonable filename to use
+   * for an ascii trace file associated with a node.
+   */
+  std::string GetFilenameFromInterfacePair (std::string prefix, Ptr<Ipv4> ipv4, 
+                                            uint32_t interface, bool useObjectNames = true);
 
   /**
    * @brief Create and initialize an output stream object we'll use to write the 
@@ -75,54 +84,144 @@
   Ptr<OutputStreamObject> CreateFileStream (std::string filename, std::string filemode);
 
   /**
-   * @brief Hook a trace source to the default enqueue operation trace sink
+   * @brief Hook a trace source to the default enqueue operation trace sink that
+   * does not accept nor log a trace context.
    */
-  template <typename T> void HookDefaultEnqueueSink (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+  template <typename T> 
+  void HookDefaultEnqueueSinkWithoutContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
 
   /**
-   * @brief Hook a trace source to the default drop operation trace sink
+   * @brief Hook a trace source to the default enqueue operation trace sink that
+   * does accept and log a trace context.
+   */
+  template <typename T> 
+  void HookDefaultEnqueueSinkWithContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+
+  /**
+   * @brief Hook a trace source to the default drop operation trace sink that 
+   * does not accept nor log a trace context.
    */
-  template <typename T> void HookDefaultDropSink (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+  template <typename T> 
+  void HookDefaultDropSinkWithoutContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+
+  /**
+   * @brief Hook a trace source to the default drop operation trace sink that 
+   * does accept and log a trace context.
+   */
+  template <typename T> 
+  void HookDefaultDropSinkWithContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
 
   /**
    * @brief Hook a trace source to the default dequeue operation trace sink
+   * that does not accept nor log a trace context.
    */
-  template <typename T> void HookDefaultDequeueSink (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+  template <typename T> 
+  void HookDefaultDequeueSinkWithoutContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+
+  /**
+   * @brief Hook a trace source to the default dequeue operation trace sink
+   * that does accept and log a trace context.
+   */
+  template <typename T> 
+  void HookDefaultDequeueSinkWithContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+
+  /**
+   * @brief Hook a trace source to the default receive operation trace sink
+   * that does not accept nor log a trace context.
+   */
+  template <typename T> 
+  void HookDefaultReceiveSinkWithoutContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
 
   /**
    * @brief Hook a trace source to the default receive operation trace sink
+   * that does accept and log a trace context.
    */
-  template <typename T> void HookDefaultReceiveSink (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+  template <typename T> 
+  void HookDefaultReceiveSinkWithContext (Ptr<T> object, std::string traceName, Ptr<OutputStreamObject> stream);
+
+  static void DefaultEnqueueSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
+  static void DefaultEnqueueSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p);
 
-private:
-  static void DefaultEnqueueSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
-  static void DefaultDropSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
-  static void DefaultDequeueSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
-  static void DefaultReceiveSink (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
+  static void DefaultDropSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
+  static void DefaultDropSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p);
+
+  static void DefaultDequeueSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
+  static void DefaultDequeueSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p);
+
+  static void DefaultReceiveSinkWithoutContext (Ptr<OutputStreamObject> file, Ptr<const Packet> p);
+  static void DefaultReceiveSinkWithContext (Ptr<OutputStreamObject> file, std::string context, Ptr<const Packet> p);
 };
 
 template <typename T> void
-AsciiTraceHelper::HookDefaultEnqueueSink (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+AsciiTraceHelper::HookDefaultEnqueueSinkWithoutContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+{
+  bool result = object->TraceConnectWithoutContext (tracename, 
+                                                    MakeBoundCallback (&DefaultEnqueueSinkWithoutContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultEnqueueSinkWithoutContext():  Unable to hook \"" 
+                 << tracename << "\"");
+}
+
+template <typename T> void
+AsciiTraceHelper::HookDefaultEnqueueSinkWithContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
 {
-  object->TraceConnectWithoutContext (tracename.c_str (), MakeBoundCallback (&DefaultEnqueueSink, file));
+  std::string context ("XXX");
+  bool result = object->TraceConnect (tracename, context, MakeBoundCallback (&DefaultEnqueueSinkWithContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultEnqueueSinkWithContext():  Unable to hook \"" 
+                 << tracename << "\"");
+}
+
+template <typename T> void
+AsciiTraceHelper::HookDefaultDropSinkWithoutContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+{
+  bool result = object->TraceConnectWithoutContext (tracename, 
+                                                    MakeBoundCallback (&DefaultDropSinkWithoutContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultDropSinkWithoutContext():  Unable to hook \"" 
+                 << tracename << "\"");
 }
 
 template <typename T> void
-AsciiTraceHelper::HookDefaultDropSink (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+AsciiTraceHelper::HookDefaultDropSinkWithContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
 {
-  object->TraceConnectWithoutContext (tracename.c_str (), MakeBoundCallback (&DefaultDropSink, file));
+  std::string context ("XXX");
+  bool result = object->TraceConnect (tracename, context, MakeBoundCallback (&DefaultDropSinkWithContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultDropSinkWithContext():  Unable to hook \"" 
+                 << tracename << "\"");
+}
+
+template <typename T> void
+AsciiTraceHelper::HookDefaultDequeueSinkWithoutContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+{
+  bool result = object->TraceConnectWithoutContext (tracename, 
+                                                    MakeBoundCallback (&DefaultDequeueSinkWithoutContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultDequeueSinkWithoutContext():  Unable to hook \"" 
+                 << tracename << "\"");
 }
 
 template <typename T> void
-AsciiTraceHelper::HookDefaultDequeueSink (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+AsciiTraceHelper::HookDefaultDequeueSinkWithContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
 {
-  object->TraceConnectWithoutContext (tracename.c_str (), MakeBoundCallback (&DefaultDequeueSink, file));
+  std::string context ("XXX");
+  bool result = object->TraceConnect (tracename, context, MakeBoundCallback (&DefaultDequeueSinkWithContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultDequeueSinkWithContext():  Unable to hook \"" 
+                 << tracename << "\"");
 }
 
 template <typename T> void
-AsciiTraceHelper::HookDefaultReceiveSink (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+AsciiTraceHelper::HookDefaultReceiveSinkWithoutContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
 {
-  object->TraceConnectWithoutContext (tracename.c_str (), MakeBoundCallback (&DefaultReceiveSink, file));
+  bool result = object->TraceConnectWithoutContext (tracename, 
+                                                    MakeBoundCallback (&DefaultReceiveSinkWithoutContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultReceiveSinkWithoutContext():  Unable to hook \"" 
+                 << tracename << "\"");
+}
+
+template <typename T> void
+AsciiTraceHelper::HookDefaultReceiveSinkWithContext (Ptr<T> object, std::string tracename, Ptr<OutputStreamObject> file)
+{
+  std::string context ("XXX");
+  bool result = object->TraceConnect (tracename, context, MakeBoundCallback (&DefaultReceiveSinkWithContext, file));
+  NS_ASSERT_MSG (result == true, "AsciiTraceHelper::HookDefaultReceiveSinkWithContext():  Unable to hook \"" 
+                 << tracename << "\"");
 }
 
 } // namespace ns3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/ascii-trace-user-helper-for-device.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,205 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 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/abort.h"
+#include "ns3/names.h"
+#include "ascii-trace-user-helper-for-device.h"
+
+namespace ns3 {
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (std::string prefix, Ptr<NetDevice> nd)
+{
+  EnableAsciiInternal (Ptr<OutputStreamObject> (), prefix, nd);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (Ptr<OutputStreamObject> stream, Ptr<NetDevice> nd)
+{
+  EnableAsciiInternal (stream, std::string (), nd);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (std::string prefix, std::string ndName)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, ndName);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (Ptr<OutputStreamObject> stream, std::string ndName)
+{
+  EnableAsciiImpl (stream, std::string (), ndName);
+}
+
+//
+// Private API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, std::string ndName)
+{
+  Ptr<NetDevice> nd = Names::Find<NetDevice> (ndName);
+  EnableAsciiImpl (stream, prefix, nd);
+}
+
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (std::string prefix, NetDeviceContainer d)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, d);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (Ptr<OutputStreamObject> stream, NetDeviceContainer d)
+{
+  EnableAsciiImpl (stream, std::string (), d);
+}
+
+//
+// Private API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, NetDeviceContainer d)
+{
+  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
+    {
+      Ptr<NetDevice> dev = *i;
+      EnableAsciiImpl (stream, prefix, dev);
+    }
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForDevice::EnableAscii (std::string prefix, NodeContainer n)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, n);
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForDevice::EnableAscii (Ptr<OutputStreamObject> stream, NodeContainer n)
+{
+  EnableAsciiImpl (stream, std::string (), n);
+}
+
+//
+// Private API
+//
+void
+AsciiTraceUserHelperForDevice::EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, NodeContainer n)
+{
+  NetDeviceContainer devs;
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
+        {
+          devs.Add (node->GetDevice (j));
+        }
+    }
+  EnableAsciiImpl (stream, prefix, devs);
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForDevice::EnableAsciiAll (std::string prefix)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, NodeContainer::GetGlobal ());
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForDevice::EnableAsciiAll (Ptr<OutputStreamObject> stream)
+{
+  EnableAsciiImpl (stream, std::string (), NodeContainer::GetGlobal ());
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (Ptr<OutputStreamObject> stream, uint32_t nodeid, uint32_t deviceid)
+{
+  EnableAsciiImpl (stream, std::string (), nodeid, deviceid);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAscii (std::string prefix, uint32_t nodeid, uint32_t deviceid)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, nodeid, deviceid);
+}
+
+//
+// Private API
+//
+void 
+AsciiTraceUserHelperForDevice::EnableAsciiImpl (
+  Ptr<OutputStreamObject> stream, 
+  std::string prefix, 
+  uint32_t nodeid, 
+  uint32_t deviceid)
+{
+  NodeContainer n = NodeContainer::GetGlobal ();
+
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      if (node->GetId () != nodeid) 
+        {
+          continue;
+        }
+      
+      NS_ABORT_MSG_IF (deviceid >= node->GetNDevices (), 
+                       "AsciiTraceUserHelperForDevice::EnableAscii(): Unknown deviceid = " << deviceid);
+
+      Ptr<NetDevice> nd = node->GetDevice (deviceid);
+
+      EnableAsciiImpl (stream, prefix, nd);
+      return;
+    }
+}
+
+} // namespace ns3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/ascii-trace-user-helper-for-device.h	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,221 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 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
+ */
+
+#ifndef ASCII_TRACE_USER_HELPER_FOR_DEVICE_H
+#define ASCII_TRACE_USER_HELPER_FOR_DEVICE_H
+
+#include <string>
+#include "ns3/net-device-container.h"
+#include "ns3/node-container.h"
+#include "ns3/output-stream-object.h"
+
+namespace ns3 {
+
+/**
+ * @brief Base class providing common ascii trace operations for helpers
+ * working with devices.
+ *
+ * There are two basic flavors of ascii tracing.  The first kind will case a
+ * trace file to be created for every traced device in the form 
+ * <file prefix>-<node number>-<device index>.tr just like the pcap trace 
+ * helpers would do.  Additionally, if the object name service is used to 
+ * define either the node or device, the name will be substituted in the 
+ * file name.  This form of ascii tracing does not include a context string
+ * and makes it easier to determine the source of the event.
+ *
+ * The second kind of tracing is more like ns-2 tracing in that there is
+ * one trace file into which all of the specified events of the specified
+ * devices are written.  This form of ascii tracing does include a context
+ * string and interleaves the trace hits from all of the devices into a 
+ * single file.
+ */
+class AsciiTraceUserHelperForDevice
+{
+public:
+  /**
+   * @brief Enable ascii trace output on the indicated net device.
+   * @internal
+   *
+   * The implementation is expected to use a provided Ptr<OutputStreamObject>
+   * if it is non-null.  If the OutputStreamObject is null, the implementation
+   * is expected to use a provided prefix to construct a new file name for
+   * each net device using the rules described in the class overview.
+   *
+   * If the prefix is provided, there will be one file per net device created.
+   * In this case, adding a trace context to the file would be pointless, so
+   * the device implementation is expected to TraceConnectWithoutContext.
+   *
+   * If the output stream object is provided, there may be many different 
+   * devices writing to a single file.  In this case, the device adding a 
+   * trace context could be important, so the device implementation is 
+   * expected to TraceConnect.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param prefix Filename prefix to use for ascii trace files.
+   * @param nd Net device for which you want to enable tracing.
+   */
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd) = 0;
+
+  /**
+   * @brief Enable ascii trace output on the indicated net device.
+   *
+   * @param prefix Filename prefix to use for ascii files.
+   * @param nd Net device for which you want to enable tracing.
+   */
+  void EnableAscii (std::string prefix, Ptr<NetDevice> nd);
+
+  /**
+   * @brief Enable ascii trace output on the indicated net device.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param nd Net device for which you want to enable tracing.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, Ptr<NetDevice> nd);
+
+  /**
+   * @brief Enable ascii trace output the indicated net device using a device 
+   * previously named using the ns-3 object name service.
+   *
+   * @param filename filename prefix to use for ascii files.
+   * @param ndName The name of the net device in which you want to enable tracing.
+   */
+  void EnableAscii (std::string prefix, std::string ndName);
+
+  /**
+   * @brief Enable ascii trace output the indicated net device using a device 
+   * previously named using the ns-3 object name service.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param ndName The name of the net device in which you want to enable tracing.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, std::string ndName);
+
+  /**
+   * @brief Enable ascii trace output on each device in the container which is
+   * of the appropriate type.
+   *
+   * @param prefix Filename prefix to use for ascii files.
+   * @param d container of devices of type ns3::CsmaNetDevice
+   */
+  void EnableAscii (std::string prefix, NetDeviceContainer d);
+
+  /**
+   * @brief Enable ascii trace output on each device in the container which is
+   * of the appropriate type.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param d container of devices of type ns3::CsmaNetDevice
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, NetDeviceContainer d);
+
+  /**
+   * @brief Enable ascii trace output on each device (which is of the 
+   * appropriate type) in the nodes provided in the container.
+   *
+   * \param prefix Filename prefix to use for ascii files.
+   * \param n container of nodes.
+   */
+  void EnableAscii (std::string prefix, NodeContainer n);
+
+  /**
+   * @brief Enable ascii trace output on each device (which is of the 
+   * appropriate type) in the nodes provided in the container.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * \param n container of nodes.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, NodeContainer n);
+
+  /**
+   * @brief Enable ascii trace output on each device (which is of the
+   * appropriate type) in the set of all nodes created in the simulation.
+   *
+   * @param prefix Filename prefix to use for ascii files.
+   */
+  void EnableAsciiAll (std::string prefix);
+
+  /**
+   * @brief Enable ascii trace output on each device (which is of the
+   * appropriate type) in the set of all nodes created in the simulation.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   */
+  void EnableAsciiAll (Ptr<OutputStreamObject> stream);
+
+  /**
+   * @brief Enable ascii trace output on the device specified by a global 
+   * node-id (of a previously created node) and associated device-id.
+   *
+   * @param prefix Filename prefix to use when creating ascii trace files
+   * @param nodeid The node identifier/number of the node on which to enable
+   *               ascii tracing
+   * @param deviceid The device identifier/index of the device on which to enable
+   *               ascii tracing
+   */
+  void EnableAscii (std::string prefix, uint32_t nodeid, uint32_t deviceid);
+
+  /**
+   * @brief Enable ascii trace output on the device specified by a global 
+   * node-id (of a previously created node) and associated device-id.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param nodeid The node identifier/number of the node on which to enable
+   *               ascii tracing
+   * @param deviceid The device identifier/index of the device on which to enable
+   *               ascii tracing
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, uint32_t nodeid, uint32_t deviceid);
+
+private:
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, uint32_t nodeid, uint32_t deviceid);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, NodeContainer n);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, NetDeviceContainer d);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, std::string ndName);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd);
+
+};
+
+} // namespace ns3
+
+#endif // ASCII_USER_HELPER_FOR_DEVICE_H
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/ascii-trace-user-helper-for-ipv4.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,210 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 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/abort.h"
+#include "ns3/names.h"
+#include "ascii-trace-user-helper-for-ipv4.h"
+
+namespace ns3 {
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface)
+{
+  EnableAsciiInternal (Ptr<OutputStreamObject> (), prefix, ipv4, interface);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (Ptr<OutputStreamObject> stream, Ptr<Ipv4> ipv4, uint32_t interface)
+{
+  EnableAsciiInternal (stream, std::string (), ipv4, interface);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (std::string prefix, std::string ipv4Name, uint32_t interface)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, ipv4Name, interface);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (Ptr<OutputStreamObject> stream, std::string ipv4Name, uint32_t interface)
+{
+  EnableAsciiImpl (stream, std::string (), ipv4Name, interface);
+}
+
+//
+// Private API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAsciiImpl (
+  Ptr<OutputStreamObject> stream, 
+  std::string prefix, 
+  std::string ipv4Name, 
+  uint32_t interface)
+{
+  Ptr<Ipv4> ipv4 = Names::Find<Ipv4> (ipv4Name);
+  EnableAsciiImpl (stream, prefix, ipv4, interface);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (std::string prefix, Ipv4InterfaceContainer c)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, c);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (Ptr<OutputStreamObject> stream, Ipv4InterfaceContainer c)
+{
+  EnableAsciiImpl (stream, std::string (), c);
+}
+
+//
+// Private API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, Ipv4InterfaceContainer c)
+{
+  for (Ipv4InterfaceContainer::Iterator i = c.Begin (); i != c.End (); ++i)
+    {
+      std::pair<Ptr<Ipv4>, uint32_t> pair = *i;
+      EnableAsciiImpl (stream, prefix, pair.first, pair.second);
+    }
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForIpv4::EnableAscii (std::string prefix, NodeContainer n)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, n);
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForIpv4::EnableAscii (Ptr<OutputStreamObject> stream, NodeContainer n)
+{
+  EnableAsciiImpl (stream, std::string (), n);
+}
+
+//
+// Private API
+//
+void
+AsciiTraceUserHelperForIpv4::EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, NodeContainer n)
+{
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> ();
+      if (ipv4)
+        {
+          for (uint32_t j = 0; j < ipv4->GetNInterfaces (); ++j)
+            {
+              EnableAsciiImpl (stream, prefix, ipv4, j);
+            }
+        }
+    }
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForIpv4::EnableAsciiAll (std::string prefix)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, NodeContainer::GetGlobal ());
+}
+
+//
+// Public API
+//
+void
+AsciiTraceUserHelperForIpv4::EnableAsciiAll (Ptr<OutputStreamObject> stream)
+{
+  EnableAsciiImpl (stream, std::string (), NodeContainer::GetGlobal ());
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (Ptr<OutputStreamObject> stream, uint32_t nodeid, uint32_t interface)
+{
+  EnableAsciiImpl (stream, std::string (), nodeid, interface);
+}
+
+//
+// Public API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAscii (std::string prefix, uint32_t nodeid, uint32_t interface)
+{
+  EnableAsciiImpl (Ptr<OutputStreamObject> (), prefix, nodeid, interface);
+}
+
+//
+// Private API
+//
+void 
+AsciiTraceUserHelperForIpv4::EnableAsciiImpl (
+  Ptr<OutputStreamObject> stream, 
+  std::string prefix, 
+  uint32_t nodeid, 
+  uint32_t interface)
+{
+  NodeContainer n = NodeContainer::GetGlobal ();
+
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      if (node->GetId () != nodeid) 
+        {
+          continue;
+        }
+
+      Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> ();
+      if (ipv4)
+        {
+          EnableAsciiImpl (stream, prefix, ipv4, interface);
+        }
+
+      return;
+    }
+}
+
+} // namespace ns3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/ascii-trace-user-helper-for-ipv4.h	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,232 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 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
+ */
+
+#ifndef ASCII_TRACE_USER_HELPER_FOR_IPV4_H
+#define ASCII_TRACE_USER_HELPER_FOR_IPV4_H
+
+#include <string>
+#include "ns3/ipv4-interface-container.h"
+#include "ns3/node-container.h"
+#include "ns3/output-stream-object.h"
+
+namespace ns3 {
+
+/**
+ * @brief Base class providing common ascii trace operations for helpers
+ * working with devices.
+ *
+ * There are two basic flavors of ascii tracing.  The first kind will case a
+ * trace file to be created for every traced device in the form 
+ * <file prefix>-<node number>-<device index>.tr just like the pcap trace 
+ * helpers would do.  Additionally, if the object name service is used to 
+ * define either the node or device, the name will be substituted in the 
+ * file name.  This form of ascii tracing does not include a context string
+ * and makes it easier to determine the source of the event.
+ *
+ * The second kind of tracing is more like ns-2 tracing in that there is
+ * one trace file into which all of the specified events of the specified
+ * devices are written.  This form of ascii tracing does include a context
+ * string and interleaves the trace hits from all of the devices into a 
+ * single file.
+ */
+class AsciiTraceUserHelperForIpv4
+{
+public:
+  /**
+   * @brief Enable ascii trace output on the indicated Ipv4 and interface pair.
+   * @internal
+   *
+   * The implementation is expected to use a provided Ptr<OutputStreamObject>
+   * if it is non-null.  If the OutputStreamObject is null, the implementation
+   * is expected to use a provided prefix to construct a new file name for
+   * each net device using the rules described in the class overview.
+   *
+   * If the prefix is provided, there will be one file per Ipv4 and interface pair
+   * created.  In this case, adding a trace context to the file would be pointless,
+   * so the helper implementation is expected to TraceConnectWithoutContext.
+   *
+   * If the output stream object is provided, there may be many different Ipv4 
+   * and interface pairs writing to a single file.  In this case, the trace 
+   * context could be important, so the helper implementation is expected to 
+   * TraceConnect.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param prefix Filename prefix to use for ascii trace files.
+   * @param ipv4 Ptr<Ipv4> on which you want to enable tracing.
+   * @param interface The interface on which you want to enable tracing.
+   */
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, 
+                                    Ptr<Ipv4> ipv4, uint32_t interface) = 0;
+
+  /**
+   * @brief Enable ascii trace output on the indicated Ipv4 and interface pair.
+   *
+   * @param prefix Filename prefix to use for ascii files.
+   * @param ipv4 Ptr<Ipv4> on which you want to enable tracing.
+   * @param interface The interface on which you want to enable tracing.
+   */
+  void EnableAscii (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface);
+
+  /**
+   * @brief Enable ascii trace output on the indicated Ipv4 and interface pair.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param ipv4 Ptr<Ipv4> on which you want to enable tracing.
+   * @param interface The interface on which you want to enable tracing.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, Ptr<Ipv4> ipv4, uint32_t interface);
+
+  /**
+   * @brief Enable ascii trace output the indicated Ipv4 and interface pair
+   * using an Ipv4 previously named using the ns-3 object name service.
+   *
+   * @param filename filename prefix to use for ascii files.
+   * @param ipv4Name The name of the Ipv4 on which you want to enable tracing.
+   * @param interface The interface on which you want to enable tracing.
+   */
+  void EnableAscii (std::string prefix, std::string ipv4Name, uint32_t interface);
+
+  /**
+   * @brief Enable ascii trace output the indicated net device using a device 
+   * previously named using the ns-3 object name service.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param ipv4Name The name of the Ipv4 on which you want to enable tracing.
+   * @param interface The interface on which you want to enable tracing.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, std::string ipv4Name, uint32_t interface);
+
+  /**
+   * @brief Enable ascii trace output on each Ipv4 and interface pair in the 
+   * container
+   *
+   * @param prefix Filename prefix to use for ascii files.
+   * @param c Ipv4InterfaceContainer of Ipv4 and interface pairs on which to 
+   *          enable tracing.
+   */
+  void EnableAscii (std::string prefix, Ipv4InterfaceContainer c);
+
+  /**
+   * @brief Enable ascii trace output on each device in the container which is
+   * of the appropriate type.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param c Ipv4InterfaceContainer of Ipv4 and interface pairs on which to 
+   *          enable tracing.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, Ipv4InterfaceContainer c);
+
+  /**
+   * @brief Enable ascii trace output on all Ipv4 and interface pairs existing
+   * in the nodes provided in the container.
+   *
+   * \param prefix Filename prefix to use for ascii files.
+   * \param n container of nodes.
+   */
+  void EnableAscii (std::string prefix, NodeContainer n);
+
+  /**
+   * @brief Enable ascii trace output on all Ipv4 and interface pairs existing
+   * in the nodes provided in the container.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * \param n container of nodes.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, NodeContainer n);
+
+  /**
+   * @brief Enable ascii trace output on all Ipv4 and interface pairs existing
+   * in the set of all nodes created in the simulation.
+   *
+   * @param prefix Filename prefix to use for ascii files.
+   */
+  void EnableAsciiAll (std::string prefix);
+
+  /**
+   * @brief Enable ascii trace output on each device (which is of the
+   * appropriate type) in the set of all nodes created in the simulation.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   */
+  void EnableAsciiAll (Ptr<OutputStreamObject> stream);
+
+  /**
+   * @brief Enable pcap output on the Ipv4 and interface pair specified by a 
+   * global node-id (of a previously created node) and interface.  Since there
+   * can be only one Ipv4 aggregated to a node, the node-id unambiguously 
+   * determines the Ipv4.
+   *
+   * @param prefix Filename prefix to use when creating ascii trace files
+   * @param nodeid The node identifier/number of the node on which to enable
+   *               ascii tracing
+   * @param interface The device identifier/index of the device on which to enable
+   *               ascii tracing
+   */
+  void EnableAscii (std::string prefix, uint32_t nodeid, uint32_t deviceid);
+
+  /**
+   * @brief Enable pcap output on the Ipv4 and interface pair specified by a 
+   * global node-id (of a previously created node) and interface.  Since there
+   * can be only one Ipv4 aggregated to a node, the node-id unambiguously 
+   * determines the Ipv4.
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param nodeid The node identifier/number of the node on which to enable
+   *               ascii tracing
+   * @param interface The interface on which you want to enable tracing.
+   */
+  void EnableAscii (Ptr<OutputStreamObject> stream, uint32_t nodeid, uint32_t interface);
+
+private:
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, uint32_t nodeid, uint32_t interface);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, NodeContainer n);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, Ipv4InterfaceContainer c);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, std::string ipv4Name, uint32_t interface);
+
+  /**
+   * @internal Avoid code duplication.
+   */
+  void EnableAsciiImpl (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface);
+
+};
+
+} // namespace ns3
+
+#endif // ASCII_USER_HELPER_FOR_IPV4_H
--- a/src/helper/ascii-trace-user-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,92 +0,0 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2010 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/abort.h"
-#include "ns3/names.h"
-#include "ascii-trace-user-helper.h"
-
-namespace ns3 {
-
-void 
-AsciiTraceUserHelper::EnableAscii (std::string prefix, Ptr<NetDevice> nd)
-{
-  EnableAsciiInternal (prefix, nd);
-}
-
-void 
-AsciiTraceUserHelper::EnableAscii (std::string prefix, std::string ndName)
-{
-  Ptr<NetDevice> nd = Names::Find<NetDevice> (ndName);
-  EnableAscii (prefix, nd);
-}
-
-void 
-AsciiTraceUserHelper::EnableAscii (std::string prefix, NetDeviceContainer d)
-{
-  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
-    {
-      Ptr<NetDevice> dev = *i;
-      EnableAscii (prefix, dev);
-    }
-}
-
-void
-AsciiTraceUserHelper::EnableAscii (std::string prefix, NodeContainer n)
-{
-  NetDeviceContainer devs;
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
-        {
-          devs.Add (node->GetDevice (j));
-        }
-    }
-  EnableAscii (prefix, devs);
-}
-
-void
-AsciiTraceUserHelper::EnableAsciiAllXXX (std::string prefix)
-{
-  EnableAscii (prefix, NodeContainer::GetGlobal ());
-}
-
-void 
-AsciiTraceUserHelper::EnableAscii (std::string prefix, uint32_t nodeid, uint32_t deviceid)
-{
-  NodeContainer n = NodeContainer::GetGlobal ();
-
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      if (node->GetId () != nodeid) 
-        {
-          continue;
-        }
-      
-      NS_ABORT_MSG_IF (deviceid >= node->GetNDevices (), 
-                       "AsciiTraceUserHelper::EnableAscii(): Unknown deviceid = " << deviceid);
-
-      Ptr<NetDevice> nd = node->GetDevice (deviceid);
-
-      EnableAscii (prefix, nd);
-      return;
-    }
-}
-
-} // namespace ns3
--- a/src/helper/ascii-trace-user-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,97 +0,0 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2010 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
- */
-
-#ifndef ASCII_USER_HELPER_H
-#define ASCII_USER_HELPER_H
-
-#include <string>
-#include "ns3/net-device-container.h"
-#include "ns3/node-container.h"
-
-namespace ns3 {
-
-/**
- * \brief Base class providing common ascii trace operations.
- */
-class AsciiTraceUserHelper
-{
-public:
-  /**
-   * @brief Enable ascii trace output on the indicated net device.
-   * @internal
-   *
-   * @param prefix Filename prefix to use for ascii trace files.
-   * @param nd Net device for which you want to enable tracing.
-   */
-  virtual void EnableAsciiInternal (std::string prefix, Ptr<NetDevice> nd) = 0;
-
-  /**
-   * @brief Enable ascii trace output on the indicated net device.
-   *
-   * @param prefix Filename prefix to use for ascii files.
-   * @param nd Net device for which you want to enable tracing.
-   */
-  void EnableAscii (std::string prefix, Ptr<NetDevice> nd);
-
-  /**
-   * @brief Enable ascii trace output the indicated net device using a device 
-   * previously named using the ns-3 object name service.
-   *
-   * @param filename filename prefix to use for ascii files.
-   * @param ndName The name of the net device in which you want to enable tracing.
-   */
-  void EnableAscii (std::string prefix, std::string ndName);
-
-  /**
-   * @brief Enable ascii trace output on each device in the container which is
-   * of the appropriate type.
-   *
-   * @param prefix Filename prefix to use for ascii files.
-   * @param d container of devices of type ns3::CsmaNetDevice
-   */
-  void EnableAscii (std::string prefix, NetDeviceContainer d);
-
-  /**
-   * @brief Enable ascii trace output on each device (which is of the 
-   * appropriate type) in the nodes provided in the container.
-   *
-   * \param prefix Filename prefix to use for ascii files.
-   * \param n container of nodes.
-   */
-  void EnableAscii (std::string prefix, NodeContainer n);
-
-  /**
-   * @brief Enable ascii trace output on each device (which is of the
-   * appropriate type) in the set of all nodes created in the simulation.
-   *
-   * @param prefix Filename prefix to use for ascii files.
-   */
-  void EnableAsciiAllXXX (std::string prefix);
-
-  /**
-   * @brief Enable ascii trace output on the device specified by a global 
-   * node-id (of a previously created node) and associated device-id.
-   *
-   * @param prefix Filename prefix to use for ascii files.
-   */
-  void EnableAscii (std::string prefix, uint32_t nodeid, uint32_t deviceid);
-};
-
-} // namespace ns3
-
-#endif // ASCII_USER_HELPER_H
--- a/src/helper/csma-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/csma-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -28,8 +28,6 @@
 #include "ns3/config.h"
 #include "ns3/packet.h"
 #include "ns3/names.h"
-#include "ns3/pcap-writer.h"
-#include "ns3/ascii-writer.h"
 
 #include "pcap-helper.h"
 #include "ascii-trace-helper.h"
@@ -90,7 +88,7 @@
     }
 
   PcapHelper pcapHelper;
-  std::string filename = pcapHelper.GetFilename (prefix, device);
+  std::string filename = pcapHelper.GetFilenameFromDevice (prefix, device);
   Ptr<PcapFileObject> file = pcapHelper.CreateFile (filename, "w", PcapHelper::DLT_EN10MB);
   if (promiscuous)
     {
@@ -103,7 +101,7 @@
 }
 
 void 
-CsmaHelper::EnableAsciiInternal (std::string prefix, Ptr<NetDevice> nd)
+CsmaHelper::EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd)
 {
   //
   // All of the ascii enable functions vector through here including the ones
@@ -118,75 +116,75 @@
     }
 
   //
-  // Set up an output stream object to deal with private ofstream copy 
-  // constructor and lifetime issues.  Let the helper decide the actual
-  // name of the file given the prefix.
+  // Our default trace sinks are going to use packet printing, so we have to 
+  // make sure that is turned on.
   //
-  AsciiTraceHelper asciiTraceHelper;
-  std::string filename = asciiTraceHelper.GetFilename (prefix, device);
-  Ptr<OutputStreamObject> stream = asciiTraceHelper.CreateFileStream (filename, "w");
-
-  //
-  // The MacRx trace source provides our "r" event.
-  //
-  asciiTraceHelper.HookDefaultReceiveSink<CsmaNetDevice> (device, "MacRx", stream);
+  Packet::EnablePrinting ();
 
   //
-  // The "+", '-', and 'd' events are driven by trace sources actually in the
-  // transmit queue.
+  // If we are not provided an OutputStreamObject, we are expected to create 
+  // one using the usual trace filename conventions and do a Hook*WithoutContext
+  // since there will be one file per context and therefore the context would
+  // be redundant.
   //
-  Ptr<Queue> queue = device->GetQueue ();
-  asciiTraceHelper.HookDefaultEnqueueSink<Queue> (queue, "Enqueue", stream);
-  asciiTraceHelper.HookDefaultDropSink<Queue> (queue, "Drop", stream);
-  asciiTraceHelper.HookDefaultDequeueSink<Queue> (queue, "Dequeue", stream);
-}
+  if (stream == 0)
+    {
+      //
+      // Set up an output stream object to deal with private ofstream copy 
+      // constructor and lifetime issues.  Let the helper decide the actual
+      // name of the file given the prefix.
+      //
+      AsciiTraceHelper asciiTraceHelper;
+      std::string filename = asciiTraceHelper.GetFilenameFromDevice (prefix, device);
+      Ptr<OutputStreamObject> theStream = asciiTraceHelper.CreateFileStream (filename, "w");
+
+      //
+      // The MacRx trace source provides our "r" event.
+      //
+      asciiTraceHelper.HookDefaultReceiveSinkWithoutContext<CsmaNetDevice> (device, "MacRx", theStream);
 
-void 
-CsmaHelper::EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid)
-{
-  Ptr<AsciiWriter> writer = AsciiWriter::Get (os);
-  Packet::EnablePrinting ();
+      //
+      // The "+", '-', and 'd' events are driven by trace sources actually in the
+      // transmit queue.
+      //
+      Ptr<Queue> queue = device->GetQueue ();
+      asciiTraceHelper.HookDefaultEnqueueSinkWithoutContext<Queue> (queue, "Enqueue", theStream);
+      asciiTraceHelper.HookDefaultDropSinkWithoutContext<Queue> (queue, "Drop", theStream);
+      asciiTraceHelper.HookDefaultDequeueSinkWithoutContext<Queue> (queue, "Dequeue", theStream);
+
+      return;
+    }
+
+  //
+  // If we are provided an OutputStreamObject, we are expected to use it, and
+  // to providd a context.  We are free to come up with our own context if we
+  // want, and use the AsciiTraceHelper Hook*WithContext functions, but for 
+  // compatibility and simplicity, we just use Config::Connect and let it deal
+  // with the context.
+  //
+  // Note that we are going to use the default trace sinks provided by the 
+  // ascii trace helper.  There is actually no AsciiTraceHelper in sight here,
+  // but the default trace sinks are actually publicly available static 
+  // functions that are always there waiting for just such a case.
+  //
+  uint32_t nodeid = nd->GetNode ()->GetId ();
+  uint32_t deviceid = nd->GetIfIndex ();
   std::ostringstream oss;
-  oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/MacRx";
-  Config::Connect (oss.str (), MakeBoundCallback (&CsmaHelper::AsciiRxEvent, writer));
+
+  oss << "/NodeList/" << nd->GetNode ()->GetId () << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/MacRx";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultReceiveSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/TxQueue/Enqueue";
-  Config::Connect (oss.str (), MakeBoundCallback (&CsmaHelper::AsciiEnqueueEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultEnqueueSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/TxQueue/Dequeue";
-  Config::Connect (oss.str (), MakeBoundCallback (&CsmaHelper::AsciiDequeueEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDequeueSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/TxQueue/Drop";
-  Config::Connect (oss.str (), MakeBoundCallback (&CsmaHelper::AsciiDropEvent, writer));
-}
-void 
-CsmaHelper::EnableAscii (std::ostream &os, NetDeviceContainer d)
-{
-  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
-    {
-      Ptr<NetDevice> dev = *i;
-      EnableAscii (os, dev->GetNode ()->GetId (), dev->GetIfIndex ());
-    }
-}
-void
-CsmaHelper::EnableAscii (std::ostream &os, NodeContainer n)
-{
-  NetDeviceContainer devs;
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
-        {
-          devs.Add (node->GetDevice (j));
-        }
-    }
-  EnableAscii (os, devs);
-}
-
-void
-CsmaHelper::EnableAsciiAll (std::ostream &os)
-{
-  EnableAscii (os, NodeContainer::GetGlobal ());
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDropSinkWithContext, stream));
 }
 
 NetDeviceContainer
@@ -272,28 +270,4 @@
   return device;
 }
 
-void 
-CsmaHelper::AsciiEnqueueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::ENQUEUE, path, packet);
-}
-
-void 
-CsmaHelper::AsciiDequeueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::DEQUEUE, path, packet);
-}
-
-void 
-CsmaHelper::AsciiDropEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::DROP, path, packet);
-}
-
-void 
-CsmaHelper::AsciiRxEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::RX, path, packet);
-}
-
 } // namespace ns3
--- a/src/helper/csma-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/csma-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -28,19 +28,17 @@
 #include "ns3/node-container.h"
 #include "ns3/csma-channel.h"
 #include "ns3/deprecated.h"
-
-#include "pcap-user-helper.h"
-#include "ascii-trace-user-helper.h"
+#include "pcap-user-helper-for-device.h"
+#include "ascii-trace-user-helper-for-device.h"
 
 namespace ns3 {
 
 class Packet;
-class AsciiWriter;
 
 /**
  * \brief build a set of CsmaNetDevice objects
  */
-class CsmaHelper : public PcapUserHelper, public AsciiTraceUserHelper
+class CsmaHelper : public PcapUserHelperForDevice, public AsciiTraceUserHelperForDevice
 {
 public:
   /**
@@ -87,45 +85,6 @@
   void SetChannelAttribute (std::string n1, const AttributeValue &v1);
 
   /**
-   * \param os output stream
-   * \param nodeid the id of the node to generate ascii output for.
-   * \param deviceid the id of the device to generate ascii output for.
-   *
-   * Enable ascii output on the specified deviceid within the
-   * specified nodeid if it is of type ns3::CsmaNetDevice and dump 
-   * that to the specified stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid);
-  /**
-   * \param os output stream
-   * \param d device container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::CsmaNetDevice type and which is located in the input
-   * device container and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NetDeviceContainer d);
-  /**
-   * \param os output stream
-   * \param n node container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::CsmaNetDevice type and which is located in one
-   * of the input node and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NodeContainer n);
-  /**
-   * \param os output stream
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::CsmaNetDevice type and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAsciiAll (std::ostream &os);
-
-  /**
    * This method creates an ns3::CsmaChannel with the attributes configured by
    * CsmaHelper::SetChannelAttribute, an ns3::CsmaNetDevice with the attributes
    * configured by CsmaHelper::SetDeviceAttribute and then adds the device
@@ -253,30 +212,11 @@
    * NetDevice-specific implementation mechanism for hooking the trace and
    * writing to the trace file.
    *
-   * \param prefix Filename prefix to use for pcap files.
+   * \param stream The output stream object to use when logging ascii traces.
+   * \param prefix Filename prefix to use for ascii trace files.
    * \param nd Net device for which you want to enable tracing.
    */
-  virtual void EnableAsciiInternal (std::string prefix, Ptr<NetDevice> nd);
-
-  /*
-   * \internal
-   */
-  static void AsciiRxEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-
-  /*
-   * \internal
-   */
-  static void AsciiEnqueueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-
-  /*
-   * \internal
-   */
-  static void AsciiDequeueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-
-  /*
-   * \internal
-   */
-  static void AsciiDropEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd);
 
   ObjectFactory m_queueFactory;
   ObjectFactory m_deviceFactory;
--- a/src/helper/emu-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/emu-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -24,12 +24,11 @@
 #include "ns3/names.h"
 #include "ns3/queue.h"
 #include "ns3/emu-net-device.h"
-#include "ns3/pcap-writer.h"
-#include "ns3/ascii-writer.h"
 #include "ns3/config.h"
 #include "ns3/packet.h"
 
 #include "pcap-helper.h"
+#include "ascii-trace-helper.h"
 #include "emu-helper.h"
 
 NS_LOG_COMPONENT_DEFINE ("EmuHelper");
@@ -82,7 +81,7 @@
     }
 
   PcapHelper pcapHelper;
-  std::string filename = pcapHelper.GetFilename (prefix, device);
+  std::string filename = pcapHelper.GetFilenameFromDevice (prefix, device);
   Ptr<PcapFileObject> file = pcapHelper.CreateFile (filename, "w", PcapHelper::DLT_EN10MB);
   if (promiscuous)
     {
@@ -95,61 +94,90 @@
 }
 
 void 
-EmuHelper::EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid)
+EmuHelper::EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd)
 {
-  NS_LOG_FUNCTION (&os << nodeid << deviceid);
-  Ptr<AsciiWriter> writer = AsciiWriter::Get (os);
+  //
+  // All of the ascii enable functions vector through here including the ones
+  // that are wandering through all of devices on perhaps all of the nodes in
+  // the system.  We can only deal with devices of type EmuNetDevice.
+  //
+  Ptr<EmuNetDevice> device = nd->GetObject<EmuNetDevice> ();
+  if (device == 0)
+    {
+      NS_LOG_INFO ("EmuHelper::EnableAsciiInternal(): Device " << device << " not of type ns3::EmuNetDevice");
+      return;
+    }
+
+  //
+  // Our default trace sinks are going to use packet printing, so we have to 
+  // make sure that is turned on.
+  //
   Packet::EnablePrinting ();
+
+  //
+  // If we are not provided an OutputStreamObject, we are expected to create 
+  // one using the usual trace filename conventions and do a Hook*WithoutContext
+  // since there will be one file per context and therefore the context would
+  // be redundant.
+  //
+  if (stream == 0)
+    {
+      //
+      // Set up an output stream object to deal with private ofstream copy 
+      // constructor and lifetime issues.  Let the helper decide the actual
+      // name of the file given the prefix.
+      //
+      AsciiTraceHelper asciiTraceHelper;
+      std::string filename = asciiTraceHelper.GetFilenameFromDevice (prefix, device);
+      Ptr<OutputStreamObject> theStream = asciiTraceHelper.CreateFileStream (filename, "w");
+
+      //
+      // The MacRx trace source provides our "r" event.
+      //
+      asciiTraceHelper.HookDefaultReceiveSinkWithoutContext<EmuNetDevice> (device, "MacRx", theStream);
+
+      //
+      // The "+", '-', and 'd' events are driven by trace sources actually in the
+      // transmit queue.
+      //
+      Ptr<Queue> queue = device->GetQueue ();
+      asciiTraceHelper.HookDefaultEnqueueSinkWithoutContext<Queue> (queue, "Enqueue", theStream);
+      asciiTraceHelper.HookDefaultDropSinkWithoutContext<Queue> (queue, "Drop", theStream);
+      asciiTraceHelper.HookDefaultDequeueSinkWithoutContext<Queue> (queue, "Dequeue", theStream);
+
+      return;
+    }
+
+  //
+  // If we are provided an OutputStreamObject, we are expected to use it, and
+  // to providd a context.  We are free to come up with our own context if we
+  // want, and use the AsciiTraceHelper Hook*WithContext functions, but for 
+  // compatibility and simplicity, we just use Config::Connect and let it deal
+  // with the context.
+  //
+  // Note that we are going to use the default trace sinks provided by the 
+  // ascii trace helper.  There is actually no AsciiTraceHelper in sight here,
+  // but the default trace sinks are actually publicly available static 
+  // functions that are always there waiting for just such a case.
+  //
+  uint32_t nodeid = nd->GetNode ()->GetId ();
+  uint32_t deviceid = nd->GetIfIndex ();
   std::ostringstream oss;
 
-  oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::EmuNetDevice/MacRx";
-  Config::Connect (oss.str (), MakeBoundCallback (&EmuHelper::AsciiRxEvent, writer));
+  oss << "/NodeList/" << nd->GetNode ()->GetId () << "/DeviceList/" << deviceid << "/$ns3::EmuNetDevice/MacRx";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultReceiveSinkWithContext, stream));
 
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::EmuNetDevice/TxQueue/Enqueue";
-  Config::Connect (oss.str (), MakeBoundCallback (&EmuHelper::AsciiEnqueueEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultEnqueueSinkWithContext, stream));
 
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::EmuNetDevice/TxQueue/Dequeue";
-  Config::Connect (oss.str (), MakeBoundCallback (&EmuHelper::AsciiDequeueEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDequeueSinkWithContext, stream));
 
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::EmuNetDevice/TxQueue/Drop";
-  Config::Connect (oss.str (), MakeBoundCallback (&EmuHelper::AsciiDropEvent, writer));
-}
-
-void 
-EmuHelper::EnableAscii (std::ostream &os, NetDeviceContainer d)
-{
-  NS_LOG_FUNCTION (&os << &d);
-  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
-    {
-      Ptr<NetDevice> dev = *i;
-      EnableAscii (os, dev->GetNode ()->GetId (), dev->GetIfIndex ());
-    }
-}
-
-void
-EmuHelper::EnableAscii (std::ostream &os, NodeContainer n)
-{
-  NS_LOG_FUNCTION (&os << &n);
-  NetDeviceContainer devs;
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
-	{
-	  devs.Add (node->GetDevice (j));
-	}
-    }
-  EnableAscii (os, devs);
-}
-
-void
-EmuHelper::EnableAsciiAll (std::ostream &os)
-{
-  NS_LOG_FUNCTION (&os);
-  EnableAscii (os, NodeContainer::GetGlobal ());
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDropSinkWithContext, stream));
 }
 
 NetDeviceContainer
@@ -190,40 +218,4 @@
   return device;
 }
 
-void
-EmuHelper::AsciiEnqueueEvent (Ptr<AsciiWriter> writer,
-                              std::string path,
-                              Ptr<const Packet> packet)
-{
-  NS_LOG_FUNCTION (writer << path << packet);
-  writer->WritePacket (AsciiWriter::ENQUEUE, path, packet);
-}
-
-void
-EmuHelper::AsciiDequeueEvent (Ptr<AsciiWriter> writer,
-                              std::string path,
-                              Ptr<const Packet> packet)
-{
-  NS_LOG_FUNCTION (writer << path << packet);
-  writer->WritePacket (AsciiWriter::DEQUEUE, path, packet);
-}
-
-void
-EmuHelper::AsciiDropEvent (Ptr<AsciiWriter> writer,
-                           std::string path,
-                           Ptr<const Packet> packet)
-{
-  NS_LOG_FUNCTION (writer << path << packet);
-  writer->WritePacket (AsciiWriter::DROP, path, packet);
-}
-
-void
-EmuHelper::AsciiRxEvent (Ptr<AsciiWriter> writer,
-                         std::string path,
-                         Ptr<const Packet> packet)
-{
-  NS_LOG_FUNCTION (writer << path << packet);
-  writer->WritePacket (AsciiWriter::RX, path, packet);
-}
-
 } // namespace ns3
--- a/src/helper/emu-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/emu-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -28,18 +28,17 @@
 #include "ns3/node-container.h"
 #include "ns3/emu-net-device.h"
 
-#include "pcap-user-helper.h"
+#include "pcap-user-helper-for-device.h"
+#include "ascii-trace-user-helper-for-device.h"
 
 namespace ns3 {
 
 class Packet;
-class PcapWriter;
-class AsciiWriter;
 
 /**
  * \brief build a set of EmuNetDevice objects
  */
-class EmuHelper : public PcapUserHelper
+class EmuHelper : public PcapUserHelperForDevice, public AsciiTraceUserHelperForDevice
 {
 public:
   /*
@@ -78,48 +77,6 @@
   void SetAttribute (std::string n1, const AttributeValue &v1);
 
   /**
-   * \param os output stream
-   * \param nodeid the id of the node to generate ascii output for.
-   * \param deviceid the id of the device to generate ascii output for.
-   *
-   * Enable ascii output on the specified deviceid within the
-   * specified nodeid if it is of type ns3::EmuNetDevice and dump 
-   * that to the specified stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid);
-
-  /**
-   * \param os output stream
-   * \param d device container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::EmuNetDevice type and which is located in the input
-   * device container and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NetDeviceContainer d);
-
-  /**
-   * \param os output stream
-   * \param n node container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::EmuNetDevice type and which is located in one
-   * of the input node and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NodeContainer n);
-
-  /**
-   * \param os output stream
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::EmuNetDevice type and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAsciiAll (std::ostream &os);
-
-  /**
    * This method creates an ns3::EmuNetDevice with the attributes configured by 
    * EmuHelper::SetDeviceAttribute and then adds the device to the node.
    *
@@ -165,25 +122,18 @@
    */
   virtual void EnablePcapInternal (std::string prefix, Ptr<NetDevice> nd, bool promiscuous = false);
 
-  /*
+  /**
+   * \brief Enable ascii trace output on the indicated net device.
    * \internal
-   */
-  static void AsciiRxEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-
-  /*
-   * \internal
+   *
+   * NetDevice-specific implementation mechanism for hooking the trace and
+   * writing to the trace file.
+   *
+   * \param stream The output stream object to use when logging ascii traces.
+   * \param prefix Filename prefix to use for ascii trace files.
+   * \param nd Net device for which you want to enable tracing.
    */
-  static void AsciiEnqueueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-
-  /*
-   * \internal
-   */
-  static void AsciiDequeueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-
-  /*
-   * \internal
-   */
-  static void AsciiDropEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd);
 
   ObjectFactory m_queueFactory;
   ObjectFactory m_deviceFactory;
--- a/src/helper/internet-stack-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/internet-stack-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -174,8 +174,10 @@
 
 namespace ns3 {
 
+#if 0
 std::vector<InternetStackHelper::Trace> InternetStackHelper::m_traces;
 std::string InternetStackHelper::m_pcapBaseFilename;
+#endif
 
 InternetStackHelper::InternetStackHelper ()
   : m_routing (0),
@@ -270,6 +272,7 @@
 void
 InternetStackHelper::Cleanup (void)
 {
+#if 0
   uint32_t illegal = std::numeric_limits<uint32_t>::max ();
 
   for (std::vector<Trace>::iterator i = m_traces.begin ();
@@ -280,6 +283,7 @@
     i->writer = 0;
   }
   m_traces.clear ();
+#endif
 }
 
 void
@@ -373,6 +377,198 @@
   Ptr<Node> node = Names::Find<Node> (nodeName);
   Install (node);
 }
+
+void 
+InternetStackHelper::EnablePcapInternal (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface)
+{
+#if 0
+  //
+  // We would normally create the pcap file here, but we need to create a file
+  // for each interface.  This is because when the trace sink for Rx and Tx are
+  // called, we get the packet and an interface ID.  We want to group packets 
+  // to/from a given interface id into a pcap file, but we have no knowledge
+  // here about what interfaces are created.  So we have to go with the flow.
+  // Look for the file creation to happen in the 
+  //
+  PcapHelper pcapHelper;
+  std::string filename = pcapHelper.GetFilenameFromNode (prefix, node);
+  Ptr<PcapFileObject> file = pcapHelper.CreateFile (filename, "w", PcapHelper::DLT_RAW);
+
+  //
+  // We want to enable Tx and Rx traces on Ipv4L3Protocol if m_ipv4Enabled; and 
+  // we want to enable Tx and Rx traces on Ipv6L3Protocol if m_ipv6Enabled.  The
+  // simple way to do that is to let Config::Connect wander through the global 
+  // node list looking for <node> and then the appropriate protocols and trace 
+  // sources.  Since we have the node handy, we can be quicker about it, but it
+  // takes slightly more work here.
+  //
+  if (m_ipv4Enabled)
+    {
+      Ptr<Ipv4L3Protocol> ipv4L3Protocol = node->GetObject<Ipv4L3Protocol> ();
+      NS_ASSERT_MSG (ipv4L3Protocol, "InternetStackHelper::EnablePcapInternal(): "
+                     "m_ipv4Enabled and ipv4L3Protocol inconsistent");
+
+      bool result = ipv4L3Protocol->TraceConnectWithoutContext ("Tx", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect ipv4L3Protocol \"Tx\"");
+
+      result = ipv4L3Protocol->TraceConnectWithoutContext ("Rx", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect ipv4L3Protocol \"Rx\"");
+
+    }
+
+  if (m_ipv6Enabled)
+    {
+      Ptr<Ipv6L3Protocol> ipv6L3Protocol = node->GetObject<Ipv6L3Protocol> ();
+      NS_FATAL_ERROR_UNLESS (ipv6L3Protocol, "InternetStackHelper::EnablePcapInternal(): "
+                             "m_ipv6Enabled and ipv6L3Protocol inconsistent");
+
+      bool result = ipv6L3Protocol->TraceConnectWithoutContext ("Tx", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect ipv6L3Protocol \"Tx\"");
+
+      result = ipv6L3Protocol->TraceConnectWithoutContext ("Rx", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect ipv6L3Protocol \"Rx\"");
+
+    }
+#endif
+}
+
+
+
+#if 0
+  //
+  // We want to enable drop traces on Ipv4L3Protocol and ArpL3Protocol if 
+  // m_ipv4Enabled; and we want to enable the drop trace on Ipv6L3Protocol
+  // if enabled.  The simple way to do that is to let Config::Connect wander
+  // through the global node list looking for <node> and then the appropriate
+  // protocols and trace sources.  Since we have the node handy, we can be
+  // quicker about it, but it takes slightly more work here.
+  //
+  if (m_ipv4Enabled)
+    {
+      Ptr<Ipv4L3Protocol> ipv4L3Protocol = node->GetObject<Ipv4L3Protocol> ();
+      NS_ASSERT_MSG (ipv4L3Protocol, "InternetStackHelper::EnablePcapInternal(): "
+                     "m_ipv4Enabled and ipv4L3Protocol inconsistent");
+
+      bool result = ipv4L3Protocol->TraceConnectWithoutContext ("Drop", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect ipv4L3Protocol \"Drop\"");
+
+      Ptr<ArpL3Protocol> arpL3Protocol = node->GetObject<ArpL3Protocol> ();
+      NS_ASSERT_MSG (arpL3Protocol, "InternetStackHelper::EnablePcapInternal(): "
+                     "m_ipv4Enabled and arpL3Protocol inconsistent");
+
+      result = arpL3Protocol->TraceConnectWithoutContext ("Drop", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect arpL3Protocol \"Drop\"");
+    }
+
+  if (m_ipv6Enabled)
+    {
+      Ptr<Ipv6L3Protocol> ipv6L3Protocol = node->GetObject<Ipv6L3Protocol> ();
+      NS_FATAL_ERROR_UNLESS (ipv6L3Protocol, "InternetStackHelper::EnablePcapInternal(): "
+                             "m_ipv6Enabled and ipv6L3Protocol inconsistent");
+
+      bool result = ipv6L3Protocol->TraceConnectWithoutContext ("Drop", MakeBoundCallback (&DefaultSink, file));
+      NS_ASSERT_MSG (result == true, "InternetStackHelper::EnablePcapInternal():  Unable to connect ipv6L3Protocol \"Drop\"");
+    }
+#endif
+
+
+
+void 
+InternetStackHelper::EnableAsciiInternal (
+  Ptr<OutputStreamObject> stream, 
+  std::string prefix, 
+  Ptr<Ipv4> ipv4, 
+  uint32_t interface)
+{
+#if 0
+  //
+  // All of the ascii enable functions vector through here including the ones
+  // that are wandering through all of devices on perhaps all of the nodes in
+  // the system.  We can only deal with devices of type CsmaNetDevice.
+  //
+  Ptr<CsmaNetDevice> device = nd->GetObject<CsmaNetDevice> ();
+  if (device == 0)
+    {
+      NS_LOG_INFO ("CsmaHelper::EnableAsciiInternal(): Device " << device << " not of type ns3::CsmaNetDevice");
+      return;
+    }
+
+  //
+  // Our default trace sinks are going to use packet printing, so we have to 
+  // make sure that is turned on.
+  //
+  Packet::EnablePrinting ();
+
+  //
+  // If we are not provided an OutputStreamObject, we are expected to create 
+  // one using the usual trace filename conventions and do a Hook*WithoutContext
+  // since there will be one file per context and therefore the context would
+  // be redundant.
+  //
+  if (stream == 0)
+    {
+      //
+      // Set up an output stream object to deal with private ofstream copy 
+      // constructor and lifetime issues.  Let the helper decide the actual
+      // name of the file given the prefix.
+      //
+      AsciiTraceHelper asciiTraceHelper;
+      std::string filename = asciiTraceHelper.GetFilenameFromDevice (prefix, device);
+      Ptr<OutputStreamObject> theStream = asciiTraceHelper.CreateFileStream (filename, "w");
+
+      //
+      // The MacRx trace source provides our "r" event.
+      //
+      asciiTraceHelper.HookDefaultReceiveSinkWithoutContext<CsmaNetDevice> (device, "MacRx", theStream);
+
+      //
+      // The "+", '-', and 'd' events are driven by trace sources actually in the
+      // transmit queue.
+      //
+      Ptr<Queue> queue = device->GetQueue ();
+      asciiTraceHelper.HookDefaultEnqueueSinkWithoutContext<Queue> (queue, "Enqueue", theStream);
+      asciiTraceHelper.HookDefaultDropSinkWithoutContext<Queue> (queue, "Drop", theStream);
+      asciiTraceHelper.HookDefaultDequeueSinkWithoutContext<Queue> (queue, "Dequeue", theStream);
+
+      return;
+    }
+
+  //
+  // If we are provided an OutputStreamObject, we are expected to use it, and
+  // to providd a context.  We are free to come up with our own context if we
+  // want, and use the AsciiTraceHelper Hook*WithContext functions, but for 
+  // compatibility and simplicity, we just use Config::Connect and let it deal
+  // with the context.
+  //
+  // Note that we are going to use the default trace sinks provided by the 
+  // ascii trace helper.  There is actually no AsciiTraceHelper in sight here,
+  // but the default trace sinks are actually publicly available static 
+  // functions that are always there waiting for just such a case.
+  //
+  uint32_t nodeid = nd->GetNode ()->GetId ();
+  uint32_t deviceid = nd->GetIfIndex ();
+  std::ostringstream oss;
+
+  oss << "/NodeList/" << nd->GetNode ()->GetId () << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/MacRx";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultReceiveSinkWithContext, stream));
+
+  oss.str ("");
+  oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/TxQueue/Enqueue";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultEnqueueSinkWithContext, stream));
+
+  oss.str ("");
+  oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/TxQueue/Dequeue";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDequeueSinkWithContext, stream));
+
+  oss.str ("");
+  oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::CsmaNetDevice/TxQueue/Drop";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDropSinkWithContext, stream));
+#endif
+}
+
+
+
+#if 0
 void
 InternetStackHelper::EnableAscii (std::ostream &os, NodeContainer n)
 {
@@ -497,5 +693,6 @@
   p->AddHeader (header);
   writer->WritePacket (AsciiWriter::DROP, path, p);
 }
+#endif
 
 } // namespace ns3
--- a/src/helper/internet-stack-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/internet-stack-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -26,10 +26,10 @@
 #include "ns3/packet.h"
 #include "ns3/ptr.h"
 #include "ns3/object-factory.h"
-#include "ns3/pcap-writer.h"
-#include "ns3/ascii-writer.h"
 #include "ns3/ipv4-l3-protocol.h"
 #include "ns3/ipv6-l3-protocol.h"
+#include "pcap-user-helper-for-ipv4.h"
+#include "ascii-trace-user-helper-for-ipv4.h"
 
 namespace ns3 {
 
@@ -39,8 +39,15 @@
 
 /**
  * \brief aggregate IP/TCP/UDP functionality to existing Nodes.
+ *
+ * This helper enables pcap and ascii tracing of events in the internet stack
+ * associated with a node.  This is substantially similar to the tracing
+ * that happens in device helpers, but the important difference is that, well,
+ * there is no device.  This means that the creation of output file names will
+ * change, and also the user-visible methods will not reference devices and
+ * therefore the number of trace enable methods is reduced.
  */
-class InternetStackHelper
+class InternetStackHelper : public PcapUserHelperForIpv4, public AsciiTraceUserHelperForIpv4
 {
 public:
   /**
@@ -145,43 +152,6 @@
   void SetTcp (std::string tid, std::string attr, const AttributeValue &val); 
 
   /**
-   * \param os output stream
-   * \param n node container
-   *
-   * Enable ascii output on these drop traces, for each node in the NodeContainer..
-   * /NodeList/[i]/$ns3ArpL3Protocol/Drop 
-   * /NodeList/[i]/$ns3Ipv4L3Protocol/Drop 
-   * /NodeList/[i]/$ns3Ipv6L3Protocol/Drop 
-   */
-  static void EnableAscii (std::ostream &os, NodeContainer n);
-
-  /**
-   * \param os output stream
-   *
-   * Enable ascii output on these drop traces, for all nodes.
-   * /NodeList/[i]/$ns3ArpL3Protocol/Drop 
-   * /NodeList/[i]/$ns3Ipv4L3Protocol/Drop 
-   * /NodeList/[i]/$ns3Ipv6L3Protocol/Drop 
-   */
-  static void EnableAsciiAll (std::ostream &os);
-
-  /**
-   * Enable pcap output on each protocol instance which is of the
-   * ns3::Ipv4L3Protocol or ns3::Ipv6L3Protocol type.  Both Tx and 
-   * Rx events will be logged.
-   *
-   * \param filename filename prefix to use for pcap files.
-   *
-   * \warning If you perform multiple simulations in a single script,
-   * each iteration of the simulation will result in the trace files
-   * being overwritten.  We don't attempt to anticipate what a user
-   * might actually want to do, so we leave it up to them.  If you want
-   * to save any particular data, do so manually at inter-simulation 
-   * time.
-   */
-  static void EnablePcapAll (std::string filename);
-
-  /**
    * \brief Enable/disable IPv4 stack install.
    * \param enable enable state
    */
@@ -194,6 +164,28 @@
   void SetIpv6StackInstall (bool enable);
 
 private:
+  /**
+   * @brief Enable pcap output the indicated Ipv4 and interface pair.
+   * @internal
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param ipv4 Ptr to the Ipv4 interface on which you want to enable tracing.
+   * @param interface Interface ID on the Ipv4 on which you want to enable tracing.
+   */
+  virtual void EnablePcapInternal (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface);
+
+  /**
+   * @brief Enable ascii trace output on the indicated Ipv4 and interface pair.
+   * @internal
+   *
+   * @param stream An OutputStreamObject representing an existing file to use
+   *               when writing trace data.
+   * @param prefix Filename prefix to use for ascii trace files.
+   * @param ipv4 Ptr to the Ipv4 interface on which you want to enable tracing.
+   * @param interface Interface ID on the Ipv4 on which you want to enable tracing.
+   */
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface);
+
   void Initialize (void);
   ObjectFactory m_tcpFactory;
   const Ipv4RoutingHelper *m_routing;
@@ -214,6 +206,7 @@
    */
   static void Cleanup (void);
 
+#if 0
   /**
    * \internal
    */
@@ -261,6 +254,7 @@
   static uint32_t GetNodeIndex (std::string context);
 
   static std::vector<Trace> m_traces;
+#endif
 
   /**
    * \brief IPv4 install state (enabled/disabled) ?
--- a/src/helper/ipv4-interface-container.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/ipv4-interface-container.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -16,6 +16,18 @@
     }
 }
 
+Ipv4InterfaceContainer::Iterator 
+Ipv4InterfaceContainer::Begin (void) const
+{
+  return m_interfaces.begin ();
+}
+
+Ipv4InterfaceContainer::Iterator 
+Ipv4InterfaceContainer::End (void) const
+{
+  return m_interfaces.end ();
+}
+
 uint32_t 
 Ipv4InterfaceContainer::GetN (void) const
 {
--- a/src/helper/ipv4-interface-container.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/ipv4-interface-container.h	Fri Jan 22 00:58:01 2010 -0800
@@ -32,6 +32,8 @@
 class Ipv4InterfaceContainer
 {
 public:
+  typedef std::vector<std::pair<Ptr<Ipv4>, uint32_t> >::const_iterator Iterator;
+
   /**
    * Create an empty Ipv4InterfaceContainer.
    */
@@ -44,8 +46,69 @@
   void Add (Ipv4InterfaceContainer other);
 
   /**
+   * \brief Get an iterator which refers to the first pair in the 
+   * container.
+   *
+   * Pairs can be retrieved from the container in two ways.  First,
+   * directly by an index into the container, and second, using an iterator.
+   * This method is used in the iterator method and is typically used in a 
+   * for-loop to run through the pairs
+   *
+   * \code
+   *   Ipv4InterfaceContainer::Iterator i;
+   *   for (i = container.Begin (); i != container.End (); ++i)
+   *     {
+   *       std::pair<Ptr<Ipv4>, uint32_t> pair = *i;
+   *       method (pair.first, pair.second);  // use the pair
+   *     }
+   * \endcode
+   *
+   * \returns an iterator which refers to the first pair in the container.
+   */
+  Iterator Begin (void) const;
+
+  /**
+   * \brief Get an iterator which indicates past-the-last Node in the 
+   * container.
+   *
+   * Nodes can be retrieved from the container in two ways.  First,
+   * directly by an index into the container, and second, using an iterator.
+   * This method is used in the iterator method and is typically used in a 
+   * for-loop to run through the Nodes
+   *
+   * \code
+   *   NodeContainer::Iterator i;
+   *   for (i = container.Begin (); i != container.End (); ++i)
+   *     {
+   *       std::pair<Ptr<Ipv4>, uint32_t> pair = *i;
+   *       method (pair.first, pair.second);  // use the pair
+   *     }
+   * \endcode
+   *
+   * \returns an iterator which indicates an ending condition for a loop.
+   */
+  Iterator End (void) const;
+
+  /**
    * \returns the number of Ptr<Ipv4> and interface pairs stored in this 
    * Ipv4InterfaceContainer.
+   *
+   * Pairs can be retrieved from the container in two ways.  First,
+   * directly by an index into the container, and second, using an iterator.
+   * This method is used in the direct method and is typically used to
+   * define an ending condition in a for-loop that runs through the stored
+   * Nodes
+   *
+   * \code
+   *   uint32_t nNodes = container.GetN ();
+   *   for (uint32_t i = 0 i < nNodes; ++i)
+   *     {
+   *       std::pair<Ptr<Ipv4>, uint32_t> pair = container.Get (i);
+   *       method (pair.first, pair.second);  // use the pair
+   *     }
+   * \endcode
+   *
+   * \returns the number of Ptr<Node> stored in this container.
    */
   uint32_t GetN (void) const;
 
@@ -61,7 +124,6 @@
    */
   Ipv4Address GetAddress (uint32_t i, uint32_t j = 0) const;
 
-
   void SetMetric (uint32_t i, uint16_t metric);
 
   /**
--- a/src/helper/node-container.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/node-container.h	Fri Jan 22 00:58:01 2010 -0800
@@ -189,10 +189,10 @@
    * Nodes
    *
    * \code
-   *   uint32_t nNodes = continer.GetN ();
+   *   uint32_t nNodes = container.GetN ();
    *   for (uint32_t i = 0 i < nNodes; ++i)
    *     {
-   *       Ptr<Node> p = continer.Get (i)
+   *       Ptr<Node> p = container.Get (i)
    *       i->method ();  // some Node method
    *     }
    * \endcode
--- a/src/helper/pcap-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/pcap-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -77,7 +77,7 @@
 }
 
 std::string
-PcapHelper::GetFilename (std::string prefix, Ptr<NetDevice> device, bool useObjectNames)
+PcapHelper::GetFilenameFromDevice (std::string prefix, Ptr<NetDevice> device, bool useObjectNames)
 {
   NS_LOG_FUNCTION (prefix << device << useObjectNames);
   NS_ABORT_MSG_UNLESS (prefix.size (), "Empty prefix string");
@@ -102,7 +102,7 @@
     }
   else
     {
-      oss << node->GetId ();
+      oss << "n" << node->GetId ();
     }
 
   oss << "-";
@@ -113,7 +113,7 @@
     }
   else
     {
-      oss << device->GetIfIndex ();
+      oss << "d" << device->GetIfIndex ();
     }
 
   oss << ".pcap";
@@ -121,6 +121,44 @@
   return oss.str ();
 }
 
+std::string
+PcapHelper::GetFilenameFromInterfacePair (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface, bool useObjectNames)
+{
+  NS_LOG_FUNCTION (prefix << ipv4 << interface << useObjectNames);
+  NS_ABORT_MSG_UNLESS (prefix.size (), "Empty prefix string");
+
+  std::ostringstream oss;
+  oss << prefix << "-";
+
+  std::string ipv4name;
+  std::string nodename;
+
+  Ptr<Node> node = ipv4->GetObject<Node> ();
+
+  if (useObjectNames)
+    {
+      ipv4name = Names::FindName (ipv4);
+      nodename = Names::FindName (node);
+    }
+
+  if (ipv4name.size ())
+    {
+      oss << ipv4name;
+    }
+  else if (nodename.size ())
+    {
+      oss << nodename;
+    }
+  else
+    {
+      oss << "n" << node->GetId ();
+    }
+
+  oss << "-i" << interface << ".pcap";
+
+  return oss.str ();
+}
+
 //
 // The basic default trace sink.  This one just writes the packet to the pcap
 // file which is good enough for most kinds of captures.
--- a/src/helper/pcap-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/pcap-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -19,10 +19,12 @@
 #ifndef PCAP_HELPER_H
 #define PCAP_HELPER_H
 
+#include "ns3/assert.h"
 #include "ns3/net-device-container.h"
 #include "ns3/node-container.h"
 #include "ns3/simulator.h"
 #include "ns3/pcap-file-object.h"
+#include "ns3/ipv4.h"
 
 namespace ns3 {
 
@@ -45,6 +47,7 @@
   enum {DLT_NULL = 0};
   enum {DLT_EN10MB = 1};
   enum {DLT_PPP = 9};
+  enum {DLT_RAW = 101};
   enum {DLT_IEEE802_11 = 105};
   enum {DLT_PRISM_HEADER = 119};
   enum {DLT_IEEE802_11_RADIO = 127};
@@ -60,10 +63,17 @@
   ~PcapHelper ();
 
   /**
+   * @brief Let the pcap helper figure out a reasonable filename to use for a
+   * pcap file associated with a device.
+   */
+  std::string GetFilenameFromDevice (std::string prefix, Ptr<NetDevice> device, bool useObjectNames = true);
+
+  /**
    * @brief Let the pcap helper figure out a reasonable filename to use for the
-   * pcap file.
+   * pcap file associated with a node.
    */
-  std::string GetFilename (std::string prefix, Ptr<NetDevice> device, bool useObjectNames = true);
+  std::string GetFilenameFromInterfacePair (std::string prefix, Ptr<Ipv4> ipv4, 
+                                            uint32_t interface, bool useObjectNames = true);
 
   /**
    * @brief Create and initialize a pcap file.
@@ -82,7 +92,8 @@
 template <typename T> void
 PcapHelper::HookDefaultSink (Ptr<T> object, std::string tracename, Ptr<PcapFileObject> file)
 {
-  object->TraceConnectWithoutContext (tracename.c_str (), MakeBoundCallback (&DefaultSink, file));
+  bool result = object->TraceConnectWithoutContext (tracename.c_str (), MakeBoundCallback (&DefaultSink, file));
+  NS_ASSERT_MSG (result == true, "PcapHelper::HookDefaultSink():  Unable to hook \"" << tracename << "\"");
 }
 
 } // namespace ns3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/pcap-user-helper-for-device.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,90 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 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/abort.h"
+#include "ns3/names.h"
+#include "pcap-user-helper-for-device.h"
+
+namespace ns3 {
+
+void 
+PcapUserHelperForDevice::EnablePcap (std::string prefix, Ptr<NetDevice> nd, bool promiscuous)
+{
+  EnablePcapInternal (prefix, nd, promiscuous);
+}
+
+void 
+PcapUserHelperForDevice::EnablePcap (std::string prefix, std::string ndName, bool promiscuous)
+{
+  Ptr<NetDevice> nd = Names::Find<NetDevice> (ndName);
+  EnablePcap (prefix, nd, promiscuous);
+}
+
+void 
+PcapUserHelperForDevice::EnablePcap (std::string prefix, NetDeviceContainer d, bool promiscuous)
+{
+  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
+    {
+      Ptr<NetDevice> dev = *i;
+      EnablePcap (prefix, dev, promiscuous);
+    }
+}
+
+void
+PcapUserHelperForDevice::EnablePcap (std::string prefix, NodeContainer n, bool promiscuous)
+{
+  NetDeviceContainer devs;
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
+        {
+          devs.Add (node->GetDevice (j));
+        }
+    }
+  EnablePcap (prefix, devs, promiscuous);
+}
+
+void
+PcapUserHelperForDevice::EnablePcapAll (std::string prefix, bool promiscuous)
+{
+  EnablePcap (prefix, NodeContainer::GetGlobal (), promiscuous);
+}
+
+void 
+PcapUserHelperForDevice::EnablePcap (std::string prefix, uint32_t nodeid, uint32_t deviceid, bool promiscuous)
+{
+  NodeContainer n = NodeContainer::GetGlobal ();
+
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      if (node->GetId () != nodeid) 
+        {
+          continue;
+        }
+      
+      NS_ABORT_MSG_IF (deviceid >= node->GetNDevices (), "PcapUserHelperForDevice::EnablePcap(): Unknown deviceid = " 
+                       << deviceid);
+      Ptr<NetDevice> nd = node->GetDevice (deviceid);
+      EnablePcap (prefix, nd, promiscuous);
+      return;
+    }
+}
+
+} // namespace ns3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/pcap-user-helper-for-device.h	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,105 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 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
+ */
+
+#ifndef PCAP_USER_HELPER_H
+#define PCAP_USER_HELPER_H
+
+#include <string>
+#include "ns3/net-device-container.h"
+#include "ns3/node-container.h"
+
+namespace ns3 {
+
+/**
+ * \brief Base class providing common user-level pcap operations for helpers
+ * representing net devices.
+ */
+class PcapUserHelperForDevice
+{
+public:
+  /**
+   * @brief Enable pcap output the indicated net device.
+   * @internal
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param nd Net device for which you want to enable tracing.
+   * @param promiscuous If true capture all possible packets available at the device.
+   */
+  virtual void EnablePcapInternal (std::string prefix, Ptr<NetDevice> nd, bool promiscuous) = 0;
+
+  /**
+   * @brief Enable pcap output the indicated net device.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param nd Net device for which you want to enable tracing.
+   * @param promiscuous If true capture all possible packets available at the device.
+   */
+  void EnablePcap (std::string prefix, Ptr<NetDevice> nd, bool promiscuous = false);
+
+  /**
+   * @brief Enable pcap output the indicated net device using a device previously
+   * named using the ns-3 object name service.
+   *
+   * @param filename filename prefix to use for pcap files.
+   * @param ndName The name of the net device in which you want to enable tracing.
+   * @param promiscuous If true capture all possible packets available at the device.
+   */
+  void EnablePcap (std::string prefix, std::string ndName, bool promiscuous = false);
+
+  /**
+   * @brief Enable pcap output on each device in the container which is of the 
+   * appropriate type.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param d container of devices of type ns3::CsmaNetDevice
+   * @param promiscuous If true capture all possible packets available at the device.
+   */
+  void EnablePcap (std::string prefix, NetDeviceContainer d, bool promiscuous = false);
+
+  /**
+   * @brief Enable pcap output on each device (which is of the appropriate type)
+   * in the nodes provided in the container.
+   *
+   * \param prefix Filename prefix to use for pcap files.
+   * \param n container of nodes.
+   * \param promiscuous If true capture all possible packets available at the device.
+   */
+  void EnablePcap (std::string prefix, NodeContainer n, bool promiscuous = false);
+
+  /**
+   * @brief Enable pcap output on each device (which is of the appropriate type)
+   * in the set of all nodes created in the simulation.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param promiscuous If true capture all possible packets available at the device.
+   */
+  void EnablePcapAll (std::string prefix, bool promiscuous = false);
+
+  /**
+   * @brief Enable pcap output on the device specified by a global node-id (of
+   * a previously created node) and associated device-id.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param promiscuous If true capture all possible packets available at the device.
+   */
+  void EnablePcap (std::string prefix, uint32_t nodeid, uint32_t deviceid, bool promiscuous = false);
+};
+
+} // namespace ns3
+
+#endif // PCAP_USER_HELPER_H
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/pcap-user-helper-for-ipv4.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,93 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 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/abort.h"
+#include "ns3/names.h"
+#include "pcap-user-helper-for-ipv4.h"
+
+namespace ns3 {
+
+void 
+PcapUserHelperForIpv4::EnablePcap (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface)
+{
+  EnablePcapInternal (prefix, ipv4, interface);
+}
+
+void 
+PcapUserHelperForIpv4::EnablePcap (std::string prefix, std::string ipv4Name, uint32_t interface)
+{
+  Ptr<Ipv4> ipv4 = Names::Find<Ipv4> (ipv4Name);
+  EnablePcap (prefix, ipv4, interface);
+}
+
+void 
+PcapUserHelperForIpv4::EnablePcap (std::string prefix, Ipv4InterfaceContainer c)
+{
+  for (Ipv4InterfaceContainer::Iterator i = c.Begin (); i != c.End (); ++i)
+    {
+      std::pair<Ptr<Ipv4>, uint32_t> pair = *i;
+      EnablePcap (prefix, pair.first, pair.second);
+    }
+}
+
+void
+PcapUserHelperForIpv4::EnablePcap (std::string prefix, NodeContainer n)
+{
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> ();
+      if (ipv4)
+        {
+          for (uint32_t j = 0; j < ipv4->GetNInterfaces (); ++j)
+            {
+              EnablePcap (prefix, ipv4, j);
+            }
+        }
+    }
+}
+
+void
+PcapUserHelperForIpv4::EnablePcapAll (std::string prefix)
+{
+  EnablePcap (prefix, NodeContainer::GetGlobal ());
+}
+
+void 
+PcapUserHelperForIpv4::EnablePcap (std::string prefix, uint32_t nodeid, uint32_t interface)
+{
+  NodeContainer n = NodeContainer::GetGlobal ();
+
+  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
+    {
+      Ptr<Node> node = *i;
+      if (node->GetId () != nodeid) 
+        {
+          continue;
+        }
+      
+      Ptr<Ipv4> ipv4 = node->GetObject<Ipv4> ();
+      if (ipv4)
+        {
+          EnablePcap (prefix, ipv4, interface);
+        }
+      return;
+    }
+}
+
+} // namespace ns3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/helper/pcap-user-helper-for-ipv4.h	Fri Jan 22 00:58:01 2010 -0800
@@ -0,0 +1,102 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2010 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
+ */
+
+#ifndef PCAP_USER_HELPER_FOR_IPV4_H
+#define PCAP_USER_HELPER_FOR_IPV4_H
+
+#include <string>
+#include "ns3/ipv4-interface-container.h"
+#include "ns3/node-container.h"
+
+namespace ns3 {
+
+/**
+ * \brief Base class providing common user-level pcap operations for helpers
+ * representing IPv4 protocols .
+ */
+class PcapUserHelperForIpv4
+{
+public:
+  /**
+   * @brief Enable pcap output the indicated Ipv4 and interface pair.
+   * @internal
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param ipv4 Ptr<Ipv4> on which you want to enable tracing.
+   * @param interface Interface on ipv4 on which you want to enable tracing.
+   */
+  virtual void EnablePcapInternal (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface) = 0;
+
+  /**
+   * @brief Enable pcap output the indicated Ipv4 and interface pair.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param ipv4 Ptr<Ipv4> on which you want to enable tracing.
+   * @param interface Interface on ipv4 on which you want to enable tracing.
+   */
+  void EnablePcap (std::string prefix, Ptr<Ipv4> ipv4, uint32_t interface);
+
+  /**
+   * @brief Enable pcap output the indicated Ipv4 and interface pair using a
+   * Ptr<Ipv4> previously named using the ns-3 object name service.
+   *
+   * @param filename filename prefix to use for pcap files.
+   * @param ipv4Name Name of the Ptr<Ipv4> on which you want to enable tracing.
+   * @param interface Interface on ipv4 on which you want to enable tracing.
+   */
+  void EnablePcap (std::string prefix, std::string ipv4Name, uint32_t interface);
+
+  /**
+   * @brief Enable pcap output on each Ipv4 and interface pair in the container.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   * @param c Ipv4InterfaceContainer of Ipv4 and interface pairs
+   */
+  void EnablePcap (std::string prefix, Ipv4InterfaceContainer c);
+
+  /**
+   * @brief Enable pcap output on all Ipv4 and interface pairs existing in the
+   * nodes provided in the container.
+   *
+   * \param prefix Filename prefix to use for pcap files.
+   * \param n container of nodes.
+   */
+  void EnablePcap (std::string prefix, NodeContainer n);
+
+  /**
+   * @brief Enable pcap output on all Ipv4 and interface pairs existing in the 
+   * set of all nodes created in the simulation.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   */
+  void EnablePcapAll (std::string prefix);
+
+  /**
+   * @brief Enable pcap output on the Ipv4 and interface pair specified by a 
+   * global node-id (of a previously created node) and interface.  Since there
+   * can be only one Ipv4 aggregated to a node, the node-id unambiguously 
+   * determines the Ipv4.
+   *
+   * @param prefix Filename prefix to use for pcap files.
+   */
+  void EnablePcap (std::string prefix, uint32_t nodeid, uint32_t interface);
+};
+
+} // namespace ns3
+
+#endif // PCAP_USER_HELPER_FOR_IPV4_H
--- a/src/helper/pcap-user-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,90 +0,0 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2009 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/abort.h"
-#include "ns3/names.h"
-#include "pcap-user-helper.h"
-
-namespace ns3 {
-
-void 
-PcapUserHelper::EnablePcap (std::string prefix, Ptr<NetDevice> nd, bool promiscuous)
-{
-  EnablePcapInternal (prefix, nd, promiscuous);
-}
-
-void 
-PcapUserHelper::EnablePcap (std::string prefix, std::string ndName, bool promiscuous)
-{
-  Ptr<NetDevice> nd = Names::Find<NetDevice> (ndName);
-  EnablePcap (prefix, nd, promiscuous);
-}
-
-void 
-PcapUserHelper::EnablePcap (std::string prefix, NetDeviceContainer d, bool promiscuous)
-{
-  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
-    {
-      Ptr<NetDevice> dev = *i;
-      EnablePcap (prefix, dev, promiscuous);
-    }
-}
-
-void
-PcapUserHelper::EnablePcap (std::string prefix, NodeContainer n, bool promiscuous)
-{
-  NetDeviceContainer devs;
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
-        {
-          devs.Add (node->GetDevice (j));
-        }
-    }
-  EnablePcap (prefix, devs, promiscuous);
-}
-
-void
-PcapUserHelper::EnablePcapAll (std::string prefix, bool promiscuous)
-{
-  EnablePcap (prefix, NodeContainer::GetGlobal (), promiscuous);
-}
-
-void 
-PcapUserHelper::EnablePcap (std::string prefix, uint32_t nodeid, uint32_t deviceid, bool promiscuous)
-{
-  NodeContainer n = NodeContainer::GetGlobal ();
-
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      if (node->GetId () != nodeid) 
-        {
-          continue;
-        }
-      
-      NS_ABORT_MSG_IF (deviceid >= node->GetNDevices (), "PcapUserHelper::EnablePcap(): Unknown deviceid = " << deviceid);
-      Ptr<NetDevice> nd = node->GetDevice (deviceid);
-
-      EnablePcap (prefix, nd, promiscuous);
-      return;
-    }
-}
-
-} // namespace ns3
--- a/src/helper/pcap-user-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,104 +0,0 @@
-/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/*
- * Copyright (c) 2009 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
- */
-
-#ifndef PCAP_USER_HELPER_H
-#define PCAP_USER_HELPER_H
-
-#include <string>
-#include "ns3/net-device-container.h"
-#include "ns3/node-container.h"
-
-namespace ns3 {
-
-/**
- * \brief Base class providing common pcap operations.
- */
-class PcapUserHelper
-{
-public:
-  /**
-   * @brief Enable pcap output the indicated net device.
-   * @internal
-   *
-   * @param prefix Filename prefix to use for pcap files.
-   * @param nd Net device for which you want to enable tracing.
-   * @param promiscuous If true capture all possible packets available at the device.
-   */
-  virtual void EnablePcapInternal (std::string prefix, Ptr<NetDevice> nd, bool promiscuous) = 0;
-
-  /**
-   * @brief Enable pcap output the indicated net device.
-   *
-   * @param prefix Filename prefix to use for pcap files.
-   * @param nd Net device for which you want to enable tracing.
-   * @param promiscuous If true capture all possible packets available at the device.
-   */
-  void EnablePcap (std::string prefix, Ptr<NetDevice> nd, bool promiscuous = false);
-
-  /**
-   * @brief Enable pcap output the indicated net device using a device previously
-   * named using the ns-3 object name service.
-   *
-   * @param filename filename prefix to use for pcap files.
-   * @param ndName The name of the net device in which you want to enable tracing.
-   * @param promiscuous If true capture all possible packets available at the device.
-   */
-  void EnablePcap (std::string prefix, std::string ndName, bool promiscuous = false);
-
-  /**
-   * @brief Enable pcap output on each device in the container which is of the 
-   * appropriate type.
-   *
-   * @param prefix Filename prefix to use for pcap files.
-   * @param d container of devices of type ns3::CsmaNetDevice
-   * @param promiscuous If true capture all possible packets available at the device.
-   */
-  void EnablePcap (std::string prefix, NetDeviceContainer d, bool promiscuous = false);
-
-  /**
-   * @brief Enable pcap output on each device (which is of the appropriate type)
-   * in the nodes provided in the container.
-   *
-   * \param prefix Filename prefix to use for pcap files.
-   * \param n container of nodes.
-   * \param promiscuous If true capture all possible packets available at the device.
-   */
-  void EnablePcap (std::string prefix, NodeContainer n, bool promiscuous = false);
-
-  /**
-   * @brief Enable pcap output on each device (which is of the appropriate type)
-   * in the set of all nodes created in the simulation.
-   *
-   * @param prefix Filename prefix to use for pcap files.
-   * @param promiscuous If true capture all possible packets available at the device.
-   */
-  void EnablePcapAll (std::string prefix, bool promiscuous = false);
-
-  /**
-   * @brief Enable pcap output on the device specified by a global node-id (of
-   * a previously created node) and associated device-id.
-   *
-   * @param prefix Filename prefix to use for pcap files.
-   * @param promiscuous If true capture all possible packets available at the device.
-   */
-  void EnablePcap (std::string prefix, uint32_t nodeid, uint32_t deviceid, bool promiscuous = false);
-};
-
-} // namespace ns3
-
-#endif // PCAP_USER_HELPER_H
--- a/src/helper/point-to-point-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/point-to-point-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -27,10 +27,9 @@
 #include "ns3/config.h"
 #include "ns3/packet.h"
 #include "ns3/names.h"
-#include "ns3/pcap-writer.h"
-#include "ns3/ascii-writer.h"
 
 #include "pcap-helper.h"
+#include "ascii-trace-helper.h"
 #include "point-to-point-helper.h"
 
 NS_LOG_COMPONENT_DEFINE ("PointToPointHelper");
@@ -86,59 +85,97 @@
     }
 
   PcapHelper pcapHelper;
-  std::string filename = pcapHelper.GetFilename (prefix, device);
+  std::string filename = pcapHelper.GetFilenameFromDevice (prefix, device);
   Ptr<PcapFileObject> file = pcapHelper.CreateFile (filename, "w", PcapHelper::DLT_PPP);
   pcapHelper.HookDefaultSink<PointToPointNetDevice> (device, "PromiscSniffer", file);
 }
 
 void 
-PointToPointHelper::EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid)
+PointToPointHelper::EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd)
 {
-  Ptr<AsciiWriter> writer = AsciiWriter::Get (os);
+  //
+  // All of the ascii enable functions vector through here including the ones
+  // that are wandering through all of devices on perhaps all of the nodes in
+  // the system.  We can only deal with devices of type PointToPointNetDevice.
+  //
+  Ptr<PointToPointNetDevice> device = nd->GetObject<PointToPointNetDevice> ();
+  if (device == 0)
+    {
+      NS_LOG_INFO ("PointToPointHelper::EnableAsciiInternal(): Device " << device << 
+                   " not of type ns3::PointToPointNetDevice");
+      return;
+    }
+
+  //
+  // Our default trace sinks are going to use packet printing, so we have to 
+  // make sure that is turned on.
+  //
   Packet::EnablePrinting ();
+
+  //
+  // If we are not provided an OutputStreamObject, we are expected to create 
+  // one using the usual trace filename conventions and do a Hook*WithoutContext
+  // since there will be one file per context and therefore the context would
+  // be redundant.
+  //
+  if (stream == 0)
+    {
+      //
+      // Set up an output stream object to deal with private ofstream copy 
+      // constructor and lifetime issues.  Let the helper decide the actual
+      // name of the file given the prefix.
+      //
+      AsciiTraceHelper asciiTraceHelper;
+      std::string filename = asciiTraceHelper.GetFilenameFromDevice (prefix, device);
+      Ptr<OutputStreamObject> theStream = asciiTraceHelper.CreateFileStream (filename, "w");
+
+      //
+      // The MacRx trace source provides our "r" event.
+      //
+      asciiTraceHelper.HookDefaultReceiveSinkWithoutContext<PointToPointNetDevice> (device, "MacRx", theStream);
+
+      //
+      // The "+", '-', and 'd' events are driven by trace sources actually in the
+      // transmit queue.
+      //
+      Ptr<Queue> queue = device->GetQueue ();
+      asciiTraceHelper.HookDefaultEnqueueSinkWithoutContext<Queue> (queue, "Enqueue", theStream);
+      asciiTraceHelper.HookDefaultDropSinkWithoutContext<Queue> (queue, "Drop", theStream);
+      asciiTraceHelper.HookDefaultDequeueSinkWithoutContext<Queue> (queue, "Dequeue", theStream);
+
+      return;
+    }
+
+  //
+  // If we are provided an OutputStreamObject, we are expected to use it, and
+  // to providd a context.  We are free to come up with our own context if we
+  // want, and use the AsciiTraceHelper Hook*WithContext functions, but for 
+  // compatibility and simplicity, we just use Config::Connect and let it deal
+  // with the context.
+  //
+  // Note that we are going to use the default trace sinks provided by the 
+  // ascii trace helper.  There is actually no AsciiTraceHelper in sight here,
+  // but the default trace sinks are actually publicly available static 
+  // functions that are always there waiting for just such a case.
+  //
+  uint32_t nodeid = nd->GetNode ()->GetId ();
+  uint32_t deviceid = nd->GetIfIndex ();
   std::ostringstream oss;
-  oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::PointToPointNetDevice/MacRx";
-  Config::Connect (oss.str (), MakeBoundCallback (&PointToPointHelper::AsciiRxEvent, writer));
+
+  oss << "/NodeList/" << nd->GetNode ()->GetId () << "/DeviceList/" << deviceid << "/$ns3::PointToPointNetDevice/MacRx";
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultReceiveSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::PointToPointNetDevice/TxQueue/Enqueue";
-  Config::Connect (oss.str (), MakeBoundCallback (&PointToPointHelper::AsciiEnqueueEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultEnqueueSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::PointToPointNetDevice/TxQueue/Dequeue";
-  Config::Connect (oss.str (), MakeBoundCallback (&PointToPointHelper::AsciiDequeueEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDequeueSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::PointToPointNetDevice/TxQueue/Drop";
-  Config::Connect (oss.str (), MakeBoundCallback (&PointToPointHelper::AsciiDropEvent, writer));
-}
-
-void 
-PointToPointHelper::EnableAscii (std::ostream &os, NetDeviceContainer d)
-{
-  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
-    {
-      Ptr<NetDevice> dev = *i;
-      EnableAscii (os, dev->GetNode ()->GetId (), dev->GetIfIndex ());
-    }
-}
-
-void
-PointToPointHelper::EnableAscii (std::ostream &os, NodeContainer n)
-{
-  NetDeviceContainer devs;
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
-        {
-          devs.Add (node->GetDevice (j));
-        }
-    }
-  EnableAscii (os, devs);
-}
-
-void
-PointToPointHelper::EnableAsciiAll (std::ostream &os)
-{
-  EnableAscii (os, NodeContainer::GetGlobal ());
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiTraceHelper::DefaultDropSinkWithContext, stream));
 }
 
 NetDeviceContainer 
@@ -194,29 +231,4 @@
   return Install (a, b);
 }
 
-void
-PointToPointHelper::AsciiEnqueueEvent (Ptr<AsciiWriter> writer, std::string path,
-                                       Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::ENQUEUE, path, packet);
-}
-
-void
-PointToPointHelper::AsciiDequeueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::DEQUEUE, path, packet);
-}
-
-void
-PointToPointHelper::AsciiDropEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::DROP, path, packet);
-}
-
-void
-PointToPointHelper::AsciiRxEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet)
-{
-  writer->WritePacket (AsciiWriter::RX, path, packet);
-}
-
 } // namespace ns3
--- a/src/helper/point-to-point-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/point-to-point-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -20,25 +20,26 @@
 #ifndef POINT_TO_POINT_HELPER_H
 #define POINT_TO_POINT_HELPER_H
 
+#include <string>
+
 #include "ns3/object-factory.h"
 #include "ns3/net-device-container.h"
 #include "ns3/node-container.h"
 #include "ns3/deprecated.h"
-#include "pcap-user-helper.h"
-#include <string>
+
+#include "pcap-user-helper-for-device.h"
+#include "ascii-trace-user-helper-for-device.h"
 
 namespace ns3 {
 
 class Queue;
 class NetDevice;
 class Node;
-class PcapWriter;
-class AsciiWriter;
 
 /**
  * \brief Build a set of PointToPointNetDevice objects
  */
-class PointToPointHelper : public PcapUserHelper
+class PointToPointHelper : public PcapUserHelperForDevice, public AsciiTraceUserHelperForDevice
 {
 public:
   /**
@@ -96,48 +97,6 @@
   void SetChannelAttribute (std::string name, const AttributeValue &value);
 
   /**
-   * \param os output stream
-   * \param nodeid the id of the node to generate ascii output for.
-   * \param deviceid the id of the device to generate ascii output for.
-   *
-   * Enable ascii output on the specified deviceid within the
-   * specified nodeid if it is of type ns3::PointToPointNetDevice and dump 
-   * that to the specified stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid);
-
-  /**
-   * \param os output stream
-   * \param d device container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::PointToPointNetDevice type and which is located in the input
-   * device container and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NetDeviceContainer d);
-
-  /**
-   * \param os output stream
-   * \param n node container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::PointToPointNetDevice type and which is located in one
-   * of the input node and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NodeContainer n);
-
-  /**
-   * \param os output stream
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::PointToPointNetDevice type and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAsciiAll (std::ostream &os);
-
-  /**
    * \param c a set of nodes
    *
    * This method creates a ns3::PointToPointChannel with the
@@ -194,11 +153,18 @@
    */
   virtual void EnablePcapInternal (std::string prefix, Ptr<NetDevice> nd, bool promiscuous = false);
 
-  void EnableAscii (Ptr<Node> node, Ptr<NetDevice> device);
-  static void AsciiRxEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-  static void AsciiEnqueueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-  static void AsciiDequeueEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
-  static void AsciiDropEvent (Ptr<AsciiWriter> writer, std::string path, Ptr<const Packet> packet);
+  /**
+   * \brief Enable ascii trace output on the indicated net device.
+   * \internal
+   *
+   * NetDevice-specific implementation mechanism for hooking the trace and
+   * writing to the trace file.
+   *
+   * \param stream The output stream object to use when logging ascii traces.
+   * \param prefix Filename prefix to use for ascii trace files.
+   * \param nd Net device for which you want to enable tracing.
+   */
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd);
 
   ObjectFactory m_queueFactory;
   ObjectFactory m_channelFactory;
--- a/src/helper/wscript	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/wscript	Fri Jan 22 00:58:01 2010 -0800
@@ -49,8 +49,10 @@
         'csma-star-helper.cc',
         'udp-client-server-helper.cc',
         'pcap-helper.cc',
-        'pcap-user-helper.cc',
-        'ascii-trace-user-helper.cc',
+        'pcap-user-helper-for-device.cc',
+        'pcap-user-helper-for-ipv4.cc',
+        'ascii-trace-user-helper-for-device.cc',
+        'ascii-trace-user-helper-for-ipv4.cc',
         'ascii-trace-helper.cc',
         ]
 
@@ -104,8 +106,10 @@
         'csma-star-helper.h',
         'udp-client-server-helper.h',
         'pcap-helper.h',
-        'pcap-user-helper.h',
-        'ascii-trace-user-helper.h',
+        'pcap-user-helper-for-device.h',
+        'pcap-user-helper-for-ipv4.h',
+        'ascii-trace-user-helper-for-device.h',
+        'ascii-trace-user-helper-for-ipv4.h',
         'ascii-trace-helper.h',
         ]
 
--- a/src/helper/yans-wifi-helper.cc	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/yans-wifi-helper.cc	Fri Jan 22 00:58:01 2010 -0800
@@ -17,8 +17,9 @@
  *
  * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
  */
+
 #include "pcap-helper.h"
-#include "pcap-user-helper.h"
+#include "ascii-trace-helper.h"
 #include "yans-wifi-helper.h"
 #include "ns3/error-rate-model.h"
 #include "ns3/propagation-loss-model.h"
@@ -40,21 +41,55 @@
 
 namespace ns3 {
 
-static void AsciiPhyTxEvent (Ptr<AsciiWriter> writer, std::string path,
-                             Ptr<const Packet> packet,
-                             WifiMode mode, WifiPreamble preamble,
-                             uint8_t txLevel)
+static void 
+AsciiPhyTransmitSinkWithContext (
+  Ptr<OutputStreamObject> stream, 
+  std::string context, 
+  Ptr<const Packet> p,
+  WifiMode mode, 
+  WifiPreamble preamble,
+  uint8_t txLevel)
 {
-  writer->WritePacket (AsciiWriter::TX, path, packet);
+  NS_LOG_FUNCTION (stream << context << p << mode << preamble << txLevel);
+  *stream->GetStream () << "t " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;
+}
+
+static void 
+AsciiPhyTransmitSinkWithoutContext (
+  Ptr<OutputStreamObject> stream, 
+  Ptr<const Packet> p,
+  WifiMode mode, 
+  WifiPreamble preamble,
+  uint8_t txLevel)
+{
+  NS_LOG_FUNCTION (stream << p << mode << preamble << txLevel);
+  *stream->GetStream () << "t " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
 }
 
-static void AsciiPhyRxOkEvent (Ptr<AsciiWriter> writer, std::string path,
-                               Ptr<const Packet> packet, double snr, WifiMode mode,
-                               enum WifiPreamble preamble)
+static void 
+AsciiPhyReceiveSinkWithContext (
+  Ptr<OutputStreamObject> stream,
+  std::string context,
+  Ptr<const Packet> p, 
+  double snr, 
+  WifiMode mode,
+  enum WifiPreamble preamble)
 {
-  writer->WritePacket (AsciiWriter::RX, path, packet);
+  NS_LOG_FUNCTION (stream << context << p << snr << mode << preamble);
+  *stream->GetStream () << "r " << Simulator::Now ().GetSeconds () << " " << context << " " << *p << std::endl;
 }
 
+static void 
+AsciiPhyReceiveSinkWithoutContext (
+  Ptr<OutputStreamObject> stream,
+  Ptr<const Packet> p, 
+  double snr, 
+  WifiMode mode,
+  enum WifiPreamble preamble)
+{
+  NS_LOG_FUNCTION (stream << p << snr << mode << preamble);
+  *stream->GetStream () << "r " << Simulator::Now ().GetSeconds () << " " << *p << std::endl;
+}
 
 YansWifiChannelHelper::YansWifiChannelHelper ()
 {}
@@ -372,7 +407,7 @@
   NS_ABORT_MSG_IF (phy == 0, "YansWifiPhyHelper::EnablePcapInternal(): Phy layer in WifiNetDevice must be set");
 
   PcapHelper pcapHelper;
-  std::string filename = pcapHelper.GetFilename (prefix, device);
+  std::string filename = pcapHelper.GetFilenameFromDevice (prefix, device);
 
   Ptr<PcapFileObject> file = pcapHelper.CreateFile (filename, "w", m_pcapDlt);
 
@@ -381,45 +416,78 @@
 }
 
 void 
-YansWifiPhyHelper::EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid)
+YansWifiPhyHelper::EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd)
 {
-  Ptr<AsciiWriter> writer = AsciiWriter::Get (os);
+  //
+  // All of the ascii enable functions vector through here including the ones
+  // that are wandering through all of devices on perhaps all of the nodes in
+  // the system.  We can only deal with devices of type CsmaNetDevice.
+  //
+  Ptr<WifiNetDevice> device = nd->GetObject<WifiNetDevice> ();
+  if (device == 0)
+    {
+      NS_LOG_INFO ("YansWifiHelper::EnableAsciiInternal(): Device " << device << " not of type ns3::WifiNetDevice");
+      return;
+    }
+
+  //
+  // Our trace sinks are going to use packet printing, so we have to make sure
+  // that is turned on.
+  //
   Packet::EnablePrinting ();
+
+  uint32_t nodeid = nd->GetNode ()->GetId ();
+  uint32_t deviceid = nd->GetIfIndex ();
   std::ostringstream oss;
+
+  //
+  // If we are not provided an OutputStreamObject, we are expected to create 
+  // one using the usual trace filename conventions and write our traces 
+  // without a context since there will be one file per context and therefore
+  // the context would be redundant.
+  //
+  if (stream == 0)
+    {
+      //
+      // Set up an output stream object to deal with private ofstream copy 
+      // constructor and lifetime issues.  Let the helper decide the actual
+      // name of the file given the prefix.
+      //
+      AsciiTraceHelper asciiTraceHelper;
+      std::string filename = asciiTraceHelper.GetFilenameFromDevice (prefix, device);
+      Ptr<OutputStreamObject> theStream = asciiTraceHelper.CreateFileStream (filename, "w");
+
+      //
+      // We could go poking through the phy and the state looking for the 
+      // correct trace source, but we can let Config deal with that with 
+      // some search cost.  Since this is presumably happening at topology
+      // creation time, it doesn't seem much of a price to pay.
+      //
+      oss.str ("");
+      oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::WifiNetDevice/Phy/State/RxOk";
+      Config::ConnectWithoutContext (oss.str (), MakeBoundCallback (&AsciiPhyReceiveSinkWithoutContext, stream));
+
+      oss.str ("");
+      oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::WifiNetDevice/Phy/State/Tx";
+      Config::ConnectWithoutContext (oss.str (), MakeBoundCallback (&AsciiPhyTransmitSinkWithoutContext, stream));
+
+      return;
+    }
+
+  //
+  // If we are provided an OutputStreamObject, we are expected to use it, and
+  // to provide a context.  We are free to come up with our own context if we
+  // want, and use the AsciiTraceHelper Hook*WithContext functions, but for 
+  // compatibility and simplicity, we just use Config::Connect and let it deal
+  // with coming up with a context.
+  //
+  oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::WifiNetDevice/Phy/State/RxOk";
-  Config::Connect (oss.str (), MakeBoundCallback (&AsciiPhyRxOkEvent, writer));
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiPhyReceiveSinkWithContext, stream));
+
   oss.str ("");
   oss << "/NodeList/" << nodeid << "/DeviceList/" << deviceid << "/$ns3::WifiNetDevice/Phy/State/Tx";
-  Config::Connect (oss.str (), MakeBoundCallback (&AsciiPhyTxEvent, writer));
-}
-void 
-YansWifiPhyHelper::EnableAscii (std::ostream &os, NetDeviceContainer d)
-{
-  for (NetDeviceContainer::Iterator i = d.Begin (); i != d.End (); ++i)
-    {
-      Ptr<NetDevice> dev = *i;
-      EnableAscii (os, dev->GetNode ()->GetId (), dev->GetIfIndex ());
-    }
-}
-void
-YansWifiPhyHelper::EnableAscii (std::ostream &os, NodeContainer n)
-{
-  NetDeviceContainer devs;
-  for (NodeContainer::Iterator i = n.Begin (); i != n.End (); ++i)
-    {
-      Ptr<Node> node = *i;
-      for (uint32_t j = 0; j < node->GetNDevices (); ++j)
-        {
-          devs.Add (node->GetDevice (j));
-        }
-    }
-  EnableAscii (os, devs);
-}
-
-void
-YansWifiPhyHelper::EnableAsciiAll (std::ostream &os)
-{
-  EnableAscii (os, NodeContainer::GetGlobal ());
+  Config::Connect (oss.str (), MakeBoundCallback (&AsciiPhyTransmitSinkWithContext, stream));
 }
 
 } // namespace ns3
--- a/src/helper/yans-wifi-helper.h	Tue Jan 19 10:32:13 2010 -0800
+++ b/src/helper/yans-wifi-helper.h	Fri Jan 22 00:58:01 2010 -0800
@@ -21,7 +21,8 @@
 #define YANS_WIFI_HELPER_H
 
 #include "wifi-helper.h"
-#include "pcap-user-helper.h"
+#include "pcap-user-helper-for-device.h"
+#include "ascii-trace-user-helper-for-device.h"
 #include "ns3/yans-wifi-channel.h"
 #include "ns3/deprecated.h"
 
@@ -135,7 +136,7 @@
  * The Pcap and ascii traces generated by the EnableAscii and EnablePcap methods defined
  * in this class correspond to PHY-level traces. 
  */
-  class YansWifiPhyHelper : public WifiPhyHelper, public PcapUserHelper
+class YansWifiPhyHelper : public WifiPhyHelper, public PcapUserHelperForDevice, public AsciiTraceUserHelperForDevice
 {
 public:
   /**
@@ -240,48 +241,6 @@
    */
   void SetPcapDataLinkType (uint32_t dlt); 
 
-  /**
-   * \param os output stream
-   * \param nodeid the id of the node to generate ascii output for.
-   * \param deviceid the id of the device to generate ascii output for.
-   *
-   * Enable ascii output on the specified deviceid within the
-   * specified nodeid if it is of type ns3::WifiNetDevice and dump 
-   * that to the specified stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, uint32_t nodeid, uint32_t deviceid);
-
-  /**
-   * \param os output stream
-   * \param d device container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::WifiNetDevice type and which is located in the input
-   * device container and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NetDeviceContainer d);
-
-  /**
-   * \param os output stream
-   * \param n node container
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::WifiNetDevice type and which is located in one
-   * of the input node and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAscii (std::ostream &os, NodeContainer n);
-
-  /**
-   * \param os output stream
-   *
-   * Enable ascii output on each device which is of the
-   * ns3::WifiNetDevice type and dump that to the specified
-   * stdc++ output stream.
-   */
-  static void EnableAsciiAll (std::ostream &os);
-
 private:
   /**
    * \param node the node on which we wish to create a wifi PHY
@@ -304,6 +263,19 @@
    */
   virtual void EnablePcapInternal (std::string prefix, Ptr<NetDevice> nd, bool promiscuous);
 
+  /**
+   * \brief Enable ascii trace output on the indicated net device.
+   * \internal
+   *
+   * NetDevice-specific implementation mechanism for hooking the trace and
+   * writing to the trace file.
+   *
+   * \param stream The output stream object to use when logging ascii traces.
+   * \param prefix Filename prefix to use for ascii trace files.
+   * \param nd Net device for which you want to enable tracing.
+   */
+  virtual void EnableAsciiInternal (Ptr<OutputStreamObject> stream, std::string prefix, Ptr<NetDevice> nd);
+
   ObjectFactory m_phy;
   ObjectFactory m_errorRateModel;
   Ptr<YansWifiChannel> m_channel;