# HG changeset patch
# User Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
# Date 1203719693 -3600
# Node ID 0b54480c4fd1065fbcbc137a31391e00f32118b7
# Parent  b1df486516a4f3491c1fa47c700a855322fe66cb
Hook trace sources into the trace system. Add WifiTrace to give a 'simple' API to tracing wifi-specific sources.

diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/dca-txop.cc
--- a/src/devices/wifi/dca-txop.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/dca-txop.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -35,6 +35,7 @@
 #include "mac-stations.h"
 #include "wifi-phy.h"
 #include "random-stream.h"
+#include "ns3/composite-trace-resolver.h"
 
 NS_LOG_COMPONENT_DEFINE ("DcaTxop");
 
@@ -125,7 +126,7 @@
 }
 
 void 
-DcaTxop::SetLow (MacLow *low)
+DcaTxop::SetLow (Ptr<MacLow> low)
 {
   m_low = low;
 }
@@ -206,7 +207,7 @@
 }
 
 
-MacLow *
+Ptr<MacLow>
 DcaTxop::Low (void)
 {
   return m_low;
@@ -530,4 +531,21 @@
    */
 }
 
+Ptr<TraceResolver> 
+DcaTxop::GetTraceResolver (void) const
+{
+  Ptr<CompositeTraceResolver> resolver =
+    Create<CompositeTraceResolver> ();
+  resolver->AddSource ("ackTimeout",
+                       TraceDoc ("ACK timeout",
+                                 "uint32_t", "Number of transmission attemps"),
+                       m_acktimeoutTrace);
+  resolver->AddSource ("ctsTimeout",
+                       TraceDoc ("CTS timeout",
+                                 "uint32_t", "Number of transmission attemps"),
+                       m_ctstimeoutTrace);
+  resolver->SetParentResolver (Object::GetTraceResolver ());
+  return resolver;
+}
+
 } // namespace ns3
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/dca-txop.h
--- a/src/devices/wifi/dca-txop.h	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/dca-txop.h	Fri Feb 22 23:34:53 2008 +0100
@@ -26,6 +26,7 @@
 #include "ns3/packet.h"
 #include "ns3/callback-trace-source.h"
 #include "ns3/nstime.h"
+#include "ns3/object.h"
 #include "wifi-mac-header.h"
 #include "wifi-mode.h"
 
@@ -61,7 +62,7 @@
  * The rts/cts policy is similar to the fragmentation policy: when
  * a packet is bigger than a threshold, the rts/cts protocol is used.
  */
-class DcaTxop 
+class DcaTxop : public Object
 {
 public:
   typedef Callback <void, WifiMacHeader const&> TxOk;
@@ -80,7 +81,7 @@
   DcaTxop (uint32_t cwMin, uint32_t cwMax, uint32_t aifsn, DcfManager *manager);
   ~DcaTxop ();
 
-  void SetLow (MacLow *low);
+  void SetLow (Ptr<MacLow> low);
   void SetParameters (MacParameters *parameters);
   void SetStations (MacStations *stations);
   void SetTxMiddle (MacTxMiddle *txMiddle);
@@ -115,7 +116,9 @@
   friend class Dcf;
   friend class TransmissionListener;
 
-  MacLow *Low (void);
+  // Inherited from ns3::Object
+  virtual Ptr<TraceResolver> GetTraceResolver (void) const;  
+  Ptr<MacLow> Low (void);
   MacParameters *Parameters (void);
 
   /* dcf notifications forwarded here */
@@ -151,7 +154,7 @@
   TxFailed m_txFailedCallback;
   WifiMacQueue *m_queue;
   MacTxMiddle *m_txMiddle;
-  MacLow *m_low;
+  Ptr <MacLow> m_low;
   MacStations *m_stations;
   MacParameters *m_parameters;
   TransmissionListener *m_transmissionListener;
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-high-adhoc.cc
--- a/src/devices/wifi/mac-high-adhoc.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-adhoc.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -49,7 +49,7 @@
   m_callback = callback;
 }
 void
-MacHighAdhoc::SetDcaTxop (DcaTxop *dca)
+MacHighAdhoc::SetDcaTxop (Ptr<DcaTxop> dca)
 {
   m_dca = dca;
 }
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-high-adhoc.h
--- a/src/devices/wifi/mac-high-adhoc.h	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-adhoc.h	Fri Feb 22 23:34:53 2008 +0100
@@ -49,7 +49,7 @@
 
   void SetDevice (WifiNetDevice *device);
   void SetForwardCallback (ForwardCallback callback);
-  void SetDcaTxop (DcaTxop *dca);
+  void SetDcaTxop (Ptr<DcaTxop> dca);
   void SetStations (MacStations *stations);
   void SetPhy (Ptr<WifiPhy> phy);
 
@@ -60,7 +60,7 @@
   /* invoked by the MacLows. */
   void Receive (Ptr<Packet> packet, WifiMacHeader const*hdr);
 private:
-  DcaTxop *m_dca;
+  Ptr<DcaTxop> m_dca;
   WifiNetDevice *m_device;
   ForwardCallback m_callback;
   MacStations *m_stations;
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-high-nqap.cc
--- a/src/devices/wifi/mac-high-nqap.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-nqap.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -47,14 +47,14 @@
 }
 
 void 
-MacHighNqap::SetDcaTxop (DcaTxop *dca)
+MacHighNqap::SetDcaTxop (Ptr<DcaTxop> dca)
 {
   m_dca = dca;
   m_dca->SetTxOkCallback (MakeCallback (&MacHighNqap::TxOk, this));
   m_dca->SetTxFailedCallback (MakeCallback (&MacHighNqap::TxFailed, this));
 }
 void 
-MacHighNqap::SetBeaconDcaTxop (DcaTxop *dca)
+MacHighNqap::SetBeaconDcaTxop (Ptr<DcaTxop> dca)
 {
   // we do not need to be notified when a beacon has been transmitted
   // successfully or not.
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-high-nqap.h
--- a/src/devices/wifi/mac-high-nqap.h	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-nqap.h	Fri Feb 22 23:34:53 2008 +0100
@@ -54,8 +54,8 @@
   MacHighNqap ();
   ~MacHighNqap ();
 
-  void SetDcaTxop (DcaTxop *dca);
-  void SetBeaconDcaTxop (DcaTxop *dca);
+  void SetDcaTxop (Ptr<DcaTxop> dca);
+  void SetBeaconDcaTxop (Ptr<DcaTxop> dca);
   void SetDevice (WifiNetDevice *device);
   void SetStations (MacStations *stations);
   void SetPhy (Ptr<WifiPhy> phy);
@@ -79,8 +79,8 @@
   void SendOneBeacon (void);
   SupportedRates GetSupportedRates (void) const;
 
-  DcaTxop *m_dca;
-  DcaTxop *m_beaconDca;
+  Ptr<DcaTxop> m_dca;
+  Ptr<DcaTxop> m_beaconDca;
   WifiNetDevice *m_device;
   MacStations *m_stations;
   Ptr<WifiPhy> m_phy;
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-high-nqsta.cc
--- a/src/devices/wifi/mac-high-nqsta.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-nqsta.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -76,7 +76,7 @@
 }
 
 void 
-MacHighNqsta::SetDcaTxop (DcaTxop *dca)
+MacHighNqsta::SetDcaTxop (Ptr<DcaTxop> dca)
 {
   m_dca = dca;
 }
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-high-nqsta.h
--- a/src/devices/wifi/mac-high-nqsta.h	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-nqsta.h	Fri Feb 22 23:34:53 2008 +0100
@@ -57,7 +57,7 @@
   MacHighNqsta ();
   ~MacHighNqsta ();
 
-  void SetDcaTxop (DcaTxop *dca);
+  void SetDcaTxop (Ptr<DcaTxop> dca);
   void SetDevice (WifiNetDevice *device);
   void SetForwardCallback (ForwardCallback callback);
   void SetAssociatedCallback (AssociatedCallback callback);
@@ -122,7 +122,7 @@
   ForwardCallback m_forward;
   AssociatedCallback m_associatedCallback;
   DisAssociatedCallback m_disAssociatedCallback;
-  DcaTxop *m_dca;
+  Ptr<DcaTxop> m_dca;
   EventId m_beaconWatchdog;
   Time m_beaconWatchdogEnd;
   Mac48Address m_bssid;
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-low.cc
--- a/src/devices/wifi/mac-low.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-low.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -31,6 +31,7 @@
 #include "wifi-net-device.h"
 #include "mac-stations.h"
 #include "mac-parameters.h"
+#include "ns3/composite-trace-resolver.h"
 
 NS_LOG_COMPONENT_DEFINE ("MacLow");
 
@@ -1076,4 +1077,17 @@
   ForwardDown (packet, &ack, ackTxMode);
 }
 
+Ptr<TraceResolver> 
+MacLow::GetTraceResolver (void) const
+{
+  Ptr<CompositeTraceResolver> resolver =
+    Create<CompositeTraceResolver> ();
+  resolver->AddSource ("error",
+                       TraceDoc ("Receive a packet with errors",
+                                 "Packet", "the packet received"),
+                       m_dropError);
+  resolver->SetParentResolver (Object::GetTraceResolver ());
+  return resolver;
+}
+
 } // namespace ns3
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/mac-low.h
--- a/src/devices/wifi/mac-low.h	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-low.h	Fri Feb 22 23:34:53 2008 +0100
@@ -270,12 +270,12 @@
 /**
  * \brief handle RTS/CTS/DATA/ACK transactions.
  */
-class MacLow {
+class MacLow : public Object {
 public:
   typedef Callback<void, Ptr<Packet> , WifiMacHeader const*> MacLowRxCallback;
 
   MacLow ();
-  ~MacLow ();
+  virtual ~MacLow ();
 
   void SetDevice (Ptr<WifiNetDevice> device);
   void SetPhy (Ptr<WifiPhy> phy);
@@ -340,6 +340,8 @@
    */
   void ReceiveError (Ptr<Packet> packet, double rxSnr);
 private:
+  // Inherited from ns3::Object.
+  virtual Ptr<TraceResolver> GetTraceResolver (void) const;
   void CancelAllEvents (void);
   uint32_t GetAckSize (void) const;
   uint32_t GetRtsSize (void) const;
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/wifi-net-device.cc
--- a/src/devices/wifi/wifi-net-device.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/wifi-net-device.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -237,7 +237,7 @@
   m_stations->SetParameters (m_parameters);
 
   // the MacLow
-  MacLow *low = new MacLow ();
+  Ptr<MacLow> low = CreateObject<MacLow> ();
   low->SetDevice (this);
   low->SetPhy (m_phy);
   low->SetStations (m_stations);
@@ -266,10 +266,10 @@
   m_low->RegisterNavListener (m_navListener);
 }
 
-DcaTxop *
+Ptr<DcaTxop>
 WifiNetDevice::CreateDca (uint32_t minCw, uint32_t maxCw, uint32_t aifsn) const
 {
-  DcaTxop *dca = new DcaTxop (minCw, maxCw, aifsn, m_manager);
+  Ptr<DcaTxop> dca = CreateObject<DcaTxop> (minCw, maxCw, aifsn, m_manager);
   dca->SetParameters (m_parameters);
   dca->SetTxMiddle (m_txMiddle);
   dca->SetLow (m_low);
@@ -297,6 +297,7 @@
                        m_txLogger,
                        WifiNetDeviceTraceType (WifiNetDeviceTraceType::TX));
   resolver->AddComposite ("phy", m_phy);
+  resolver->AddComposite ("maclow", m_low);
   resolver->SetParentResolver (NetDevice::GetTraceResolver ());
   return resolver;
 }
@@ -357,7 +358,6 @@
   // cleanup local
   m_channel = 0;
   delete m_stations;
-  delete m_low;
   delete m_rxMiddle;
   delete m_txMiddle;
   delete m_parameters;
@@ -439,11 +439,19 @@
   // chain up.
   WifiNetDevice::DoDispose ();
   // local cleanup
-  delete m_dca;
   delete m_high;
   m_dca = 0;
   m_high = 0;
 }
+Ptr<TraceResolver> 
+AdhocWifiNetDevice::GetTraceResolver (void) const
+{
+  Ptr<CompositeTraceResolver> resolver = 
+    Create<CompositeTraceResolver> ();
+  resolver->AddComposite ("dca", m_dca);
+  resolver->SetParentResolver (WifiNetDevice::GetTraceResolver ());
+  return resolver;
+}
 
 
 /*****************************************************
@@ -528,12 +536,20 @@
   // chain up.
   WifiNetDevice::DoDispose ();
   // local cleanup
-  delete m_dca;
   delete m_high;
   m_dca = 0;
   m_high = 0;
 }
 
+Ptr<TraceResolver> 
+NqstaWifiNetDevice::GetTraceResolver (void) const
+{
+  Ptr<CompositeTraceResolver> resolver = 
+    Create<CompositeTraceResolver> ();
+  resolver->AddComposite ("dca", m_dca);
+  resolver->SetParentResolver (WifiNetDevice::GetTraceResolver ());
+  return resolver;
+}
 
 /*****************************************************
  *            AP code
@@ -623,14 +639,22 @@
   // chain up.
   WifiNetDevice::DoDispose ();
   // local cleanup
-  delete m_dca;
-  delete m_beaconDca;
   delete m_high;
   m_dca = 0;
   m_high = 0;
   m_beaconDca = 0;
 }
 
+Ptr<TraceResolver> 
+NqapWifiNetDevice::GetTraceResolver (void) const
+{
+  Ptr<CompositeTraceResolver> resolver = 
+    Create<CompositeTraceResolver> ();
+  resolver->AddComposite ("dca", m_dca);
+  resolver->AddComposite ("beaconDca", m_beaconDca);
+  resolver->SetParentResolver (WifiNetDevice::GetTraceResolver ());
+  return resolver;
+}
 
 } // namespace ns3
 
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/wifi-net-device.h
--- a/src/devices/wifi/wifi-net-device.h	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/wifi-net-device.h	Fri Feb 22 23:34:53 2008 +0100
@@ -106,8 +106,6 @@
   virtual bool DoNeedsArp (void) const;
   virtual Ptr<Channel> DoGetChannel (void) const;
   virtual bool SendTo (Ptr<Packet> packet, const Address &to, uint16_t protocolNumber);
-  // inherited from Object
-  virtual Ptr<TraceResolver> GetTraceResolver (void) const;
   // defined for children
   virtual void NotifyAttached (void) = 0;
   virtual bool DoSendTo (Ptr<const Packet> packet, const Mac48Address &to) = 0;
@@ -117,17 +115,19 @@
   CallbackTraceSource<Ptr<const Packet>, Mac48Address> m_rxLogger;
   CallbackTraceSource<Ptr<const Packet>, Mac48Address> m_txLogger;
 protected:
+  // inherited from Object
+  virtual Ptr<TraceResolver> GetTraceResolver (void) const;
   WifiNetDevice (Ptr<Node> node);
   WifiNetDevice (Ptr<Node> node, Mac48Address self);
   void DoForwardUp (Ptr<Packet> packet, const Mac48Address &from);
-  DcaTxop *CreateDca (uint32_t minCw, uint32_t maxCw, uint32_t aifsn) const;
+  Ptr<DcaTxop> CreateDca (uint32_t minCw, uint32_t maxCw, uint32_t aifsn) const;
   // inherited from Object
   virtual void DoDispose (void);
 
   Ptr<WifiChannel> m_channel;
   Ptr<WifiPhy> m_phy;
   MacStations *m_stations;
-  MacLow *m_low;
+  Ptr<MacLow> m_low;
   MacRxMiddle *m_rxMiddle;
   MacTxMiddle *m_txMiddle;
   MacParameters *m_parameters;
@@ -161,9 +161,10 @@
   // inherited from WifiNetDefice
   virtual bool DoSendTo (Ptr<const Packet> packet, Mac48Address const & to);
   virtual void NotifyAttached (void);
+  virtual Ptr<TraceResolver> GetTraceResolver (void) const;
 
   Ssid m_ssid;
-  DcaTxop *m_dca;
+  Ptr<DcaTxop> m_dca;
   MacHighAdhoc *m_high;
 };
 
@@ -207,9 +208,10 @@
   // inherited from WifiNetDefice
   virtual bool DoSendTo (Ptr<const Packet> packet, Mac48Address const & to);
   virtual void NotifyAttached (void);
+  virtual Ptr<TraceResolver> GetTraceResolver (void) const;
 
   Ssid m_ssid;
-  DcaTxop *m_dca;
+  Ptr<DcaTxop> m_dca;
   MacHighNqsta *m_high;
 };
 
@@ -243,10 +245,11 @@
   // inherited from WifiNetDefice
   virtual bool DoSendTo (Ptr<const Packet> packet, Mac48Address const & to);
   virtual void NotifyAttached (void);
+  virtual Ptr<TraceResolver> GetTraceResolver (void) const;
 
   Ssid m_ssid;
-  DcaTxop *m_dca;
-  DcaTxop *m_beaconDca;
+  Ptr<DcaTxop> m_dca;
+  Ptr<DcaTxop> m_beaconDca;
   MacHighNqap *m_high;
 };
 
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/wifi-trace.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/devices/wifi/wifi-trace.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -0,0 +1,197 @@
+/* -*-	Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 INRIA
+ * All rights reserved.
+ *
+ * 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
+ *
+ * Author: Federico Maguolo <maguolof@dei.unipd.it>
+ */
+#include "wifi-trace.h"
+
+#include "ns3/trace-context.h"
+#include "ns3/simulator.h"
+#include "ns3/node.h"
+#include "ns3/node-list.h"
+#include "ns3/packet.h"
+#include "ns3/queue.h"
+
+namespace ns3 {
+
+WifiTrace::WifiTrace (std::string filename)
+{
+  m_os.open (filename.c_str ());
+}
+
+WifiTrace::WifiTrace ()
+{}
+
+WifiTrace::~WifiTrace ()
+{
+  if (m_os.is_open ())
+    m_os.close ();
+}
+
+void
+WifiTrace::TraceAllNetDeviceRx (void)
+{
+  Packet::EnableMetadata ();
+  NodeList::Connect ("/nodes/*/devices/*/rx",
+                     MakeCallback (&WifiTrace::LogDevRx, this));
+}
+
+void
+WifiTrace::TraceAllNetDeviceTx (void)
+{
+  Packet::EnableMetadata ();
+  NodeList::Connect ("/nodes/*/devices/*/tx",
+                     MakeCallback (&WifiTrace::LogDevTx, this));
+}
+
+void
+WifiTrace::TraceAllPhy (void)
+{
+  Packet::EnableMetadata ();
+  NodeList::Connect ("/nodes/*/devices/*/*/state",
+                     MakeCallback (&WifiTrace::LogPhy, this));
+}
+
+void
+WifiTrace::TraceAllErrors (void)
+{
+  Packet::EnableMetadata ();
+  NodeList::Connect ("/nodes/*/devices/*/*/error",
+                     MakeCallback (&WifiTrace::LogErrors, this));
+}
+
+void
+WifiTrace::TraceAckTimeouts (void)
+{
+  Packet::EnableMetadata ();
+  NodeList::Connect ("/nodes/*/devices/*/*/ackTimeout",
+                     MakeCallback (&WifiTrace::LogAckTimeout, this));
+}
+
+void
+WifiTrace::TraceCtsTimeouts (void)
+{
+  Packet::EnableMetadata ();
+  NodeList::Connect ("/nodes/*/devices/*/*/ctsTimeout",
+                     MakeCallback (&WifiTrace::LogCtsTimeout, this));
+}
+
+void 
+WifiTrace::LogDevRx (TraceContext const &context, Ptr<const Packet> p, Mac48Address addr)
+{
+  if (!m_os.is_open ())
+    return;
+  m_os << "r " << Simulator::Now ().GetSeconds () << " ";
+  uint8_t buf[6];
+  addr.CopyTo (buf);
+  for (uint8_t i = 0; i < 6; i++) {
+    m_os << (buf[i] + 0);
+    if (i < 5)
+      m_os << ".";
+  }
+  m_os << " ";
+  context.Print (m_os);
+  m_os << " pkt-uid=" << p->GetUid () << " ";
+  p->Print (m_os);
+  m_os << std::endl;  
+}
+
+void 
+WifiTrace::LogDevTx (TraceContext const &context, Ptr<const Packet> p, Mac48Address addr)
+{
+  if (!m_os.is_open ())
+    return;
+  m_os << "s " << Simulator::Now ().GetSeconds () << " ";
+  uint8_t buf[6];
+  addr.CopyTo (buf);
+  for (uint8_t i = 0; i < 6; i++) {
+    m_os << (buf[i] + 0);
+    if (i < 5)
+      m_os << ".";
+  }
+  m_os << " ";
+  context.Print (m_os);
+  m_os << " pkt-uid=" << p->GetUid () << " ";
+  p->Print (m_os);
+  m_os << std::endl;  
+}
+
+void
+WifiTrace::LogErrors (TraceContext const &context, Ptr<const Packet> p)
+{
+  if (!m_os.is_open ())
+    return;
+  m_os << "d " << Simulator::Now ().GetSeconds () << " ";
+  context.Print (m_os);
+  m_os << " pkt-uid=" << p->GetUid () << " ";
+  p->Print (m_os);
+  m_os << std::endl;  
+}
+
+void 
+WifiTrace::LogPhy (TraceContext const &context, Time s, Time d, WifiPhy::State state)
+{
+  if (!m_os.is_open ())
+    return;
+  int prec = m_os.precision ();
+  m_os.precision (9);
+  m_os << "PHY " << Simulator::Now ().GetSeconds () << " ";
+  context.Print (m_os);
+  switch(state)
+  {
+    case WifiPhy::SYNC:
+      m_os << " SYNC";
+      break;
+    case WifiPhy::TX:
+      m_os << " TX";
+      break;
+    case WifiPhy::CCA_BUSY:
+      m_os << " CCA_BUSY";
+      break;
+    case WifiPhy::IDLE:
+      m_os << " IDLE";
+      break;
+  }
+  m_os << " t=" << s.GetSeconds () << " d=" << d.GetMicroSeconds ();
+  m_os << std::endl; 
+  m_os.precision (prec);
+}
+
+void 
+WifiTrace::LogAckTimeout (TraceContext const &context, uint32_t a)
+{
+  if (!m_os.is_open ())
+    return;
+  m_os << "ACK timeout " << Simulator::Now ().GetSeconds () << " ";
+  context.Print (m_os);
+  m_os << " attemps=" << (a+0);
+  m_os << std::endl;  
+}
+
+void 
+WifiTrace::LogCtsTimeout (TraceContext const &context, uint32_t a)
+{
+  if (!m_os.is_open ())
+    return;
+  m_os << "CTS timeout " << Simulator::Now ().GetSeconds () << " ";
+  context.Print (m_os);
+  m_os << " attemps=" << (a+0);
+  m_os << std::endl;  
+}
+
+}//namespace ns3
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/wifi-trace.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/devices/wifi/wifi-trace.h	Fri Feb 22 23:34:53 2008 +0100
@@ -0,0 +1,60 @@
+/* -*-	Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 INRIA
+ * All rights reserved.
+ *
+ * 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
+ *
+ * Author: Federico Maguolo <maguolof@dei.unipd.it>
+ */
+#ifndef WIFI_TRACE_H
+#define WIFI_TRACE_H
+
+#include <string>
+#include <fstream>
+#include "ns3/wifi-phy.h"
+#include "ns3/mac48-address.h"
+//#include "ns3/ptr.h"
+
+namespace ns3 {
+
+class Packet;
+class TraceContext;
+
+class WifiTrace 
+{
+public:
+  WifiTrace (std::string filename);
+  WifiTrace ();
+  virtual ~WifiTrace ();
+  void TraceAllNetDeviceRx (void);
+  void TraceAllNetDeviceTx (void);
+  void TraceAllPhy (void);
+  void TraceAllErrors (void);
+  void TraceAckTimeouts (void);
+  void TraceCtsTimeouts (void);
+protected:
+  virtual void LogErrors (TraceContext const &context, Ptr<const Packet> p);
+  virtual void LogDevRx (TraceContext const &context, Ptr<const Packet> p, Mac48Address addr);
+  virtual void LogDevTx (TraceContext const &context, Ptr<const Packet> p, Mac48Address addr);
+  virtual void LogPhy (TraceContext const &context, Time s, Time d, WifiPhy::State state);
+  virtual void LogAckTimeout (TraceContext const &context, uint32_t a);
+  virtual void LogCtsTimeout (TraceContext const &context, uint32_t a);
+private:
+  std::ofstream m_os;
+};
+
+}//namespace ns3
+
+#endif /* ASCII_TRACE_H */
diff -r b1df486516a4 -r 0b54480c4fd1 src/devices/wifi/wscript
--- a/src/devices/wifi/wscript	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/wscript	Fri Feb 22 23:34:53 2008 +0100
@@ -36,6 +36,7 @@
         'dcf-manager-test.cc',
         'onoe-mac-stations.cc',
         'amrr-mac-stations.cc',
+	'wifi-trace.cc',
         ]
     headers = bld.create_obj('ns3header')
     headers.source = [
@@ -47,4 +48,5 @@
         'wifi-preamble.h',
 	'wifi-phy-standard.h',
         'wifi-phy.h',
+	'wifi-trace.h',
         ]