--- a/doc/release_steps.txt	Tue Apr 01 17:05:54 2008 -0700
+++ b/doc/release_steps.txt	Wed Apr 02 21:33:31 2008 -0700
@@ -19,10 +19,25 @@
    - cd /home/code/repos/ns-3.0.x/.hg and edit the hgrc appropriately:
      "description = ns-3.0.x release
       name = ns-3.0.x"
-6. upload "ns-3.0.x.tar.bz2" to the /var/www/html/releases/ directory on 
+6. Run the regression tests on the new release and update the reference traces
+   - cd regression
+   - python regression.py
+   - There should be no regressions at this time
+   - tag ns-3-dev-ref-traces with "release ns-3.0.X"
+     hg tag "release ns-3.0.x"
+     hg push
+   - clone the ns-3-dev-ref-traces and place it on the repository as in step
+     6 but use the name ns-3.0.x-ref-traces
+7. Create a reference traces tarball
+   - cd regression
+   - tar -cjf ns-3.0.x-ref-traces.tar.bz2 ns-3-dev-ref-traces/
+8. upload "ns-3.0.x.tar.bz2" to the /var/www/html/releases/ directory on 
    the www.nsnam.org server
    - give it 644 file permissions, and user/group = apache
-7. update web pages on www.nsnam.org (source is in the www/ module)
+9. upload "ns-3.0.x-ref-traces.tar.bz2" to the /var/www/html/releases/ 
+   directory on the www.nsnam.org server
+   - give it 644 file permissions, and user/group = apache
+10. update web pages on www.nsnam.org (source is in the www/ module)
    - add link to news.html
    - update getting_started.html
    - update documents.html
@@ -32,4 +47,4 @@
      -- edit ~/bin/update-doxygen-release file and change RELEASE variable 
         to the right version number 
      -- run ~/bin/update-doxygen-release
-8. announce to ns-developers, with summary of release notes
+11. announce to ns-developers, with summary of release notes

--- a/examples/tcp-large-transfer.cc	Tue Apr 01 17:05:54 2008 -0700
+++ b/examples/tcp-large-transfer.cc	Wed Apr 02 21:33:31 2008 -0700
@@ -117,6 +117,11 @@
   //  LogComponentEnable("PacketSink", LOG_LEVEL_ALL);
   //  LogComponentEnable("TcpLargeTransfer", LOG_LEVEL_ALL);
 
+  //
+  // Make the random number generators generate reproducible results.
+  //
+  RandomVariable::UseGlobalSeed (1, 1, 2, 3, 5, 8);
+
   // Allow the user to override any of the defaults and the above
   // Bind()s at run-time, via command-line arguments
   CommandLine cmd;
@@ -182,9 +187,9 @@
 
   std::ofstream ascii;
   ascii.open ("tcp-large-transfer.tr");
-  PointToPointHelper::EnablePcap ("tcp-large-transfer");
   PointToPointHelper::EnableAscii (ascii);
 
+  InternetStackHelper::EnablePcap ("tcp-large-transfer");
 
   Simulator::StopAt (Seconds(1000));
   Simulator::Run ();

--- a/regression/regression.py	Tue Apr 01 17:05:54 2008 -0700
+++ b/regression/regression.py	Wed Apr 02 21:33:31 2008 -0700
@@ -36,20 +36,20 @@
 # mercurial on the system.  It is expected to be created using tar -cjf and
 # will be extracted using tar -xjf
 #
-refTarName = "ns-3-ref-traces.tar.bz2"
+refTarName = "ns-3.0.12-ref-traces.tar.bz2"
 
 #
 # The path to the Mercurial repository used to find the reference traces if
 # we find "hg" on the system.  We expect that the repository will be named
 # identically to refDirName below
 #
-refRepo = "http://code.nsnam.org/craigdo/"
+refRepo = "http://code.nsnam.org/"
 
 #
 # The local directory name into which the reference traces will go in either
 # case (net or hg).
 #
-refDirName = "ns-3-ref-traces"
+refDirName = "ns-3-dev-ref-traces"
 
 def main(tests = None, testdir = None):
     """Execute regression tests.
@@ -78,33 +78,6 @@
         if o == '-v': verbose = 1
         if o == '-g': generate = 1
 
-    print "========== Running Unit Tests =========="
-    os.system("./waf check")
-
-    print "========== Running Regression Tests =========="
-    if os.system("hg version > /dev/null 2>&1") == 0:
-        print "Synchronizing reference traces using Mercurial."
-        if not os.path.exists(refDirName):
-            os.system("hg clone " + refRepo + refDirName +
-              " > /dev/null 2>&1")
-        else:
-            os.chdir(refDirName)
-            os.system("hg pull " + refRepo + refDirName +
-                " > /dev/null 2>&1")
-            os.chdir("..")
-    else:
-        print "Synchronizing reference traces from web."
-        urllib.urlretrieve(refUrl + refTarName, refTarName)
-        os.system("tar -xjf " + refTarName)
-
-    print "Done."
-
-    bad = []
-
-    if not os.path.exists(refDirName):
-        print "Reference traces directory does not exist"
-        return 3
-    
     if not testdir:
         testdir = os.path.join(os.curdir, "tests")
 
@@ -123,12 +96,39 @@
 
     if not tests:
         tests = findtests(testdir)
+        if not generate:
+            print "========== Running Unit Tests =========="
+            os.system("./waf check")
+
+    print "========== Running Regression Tests =========="
+
+    if os.system("hg version > /dev/null 2>&1") == 0:
+        print "Synchronizing reference traces using Mercurial."
+        if not os.path.exists(refDirName):
+            os.system("hg clone " + refRepo + refDirName + " > /dev/null 2>&1")
+        else:
+            os.chdir(refDirName)
+            os.system("hg pull " + refRepo + refDirName + " > /dev/null 2>&1")
+            os.chdir("..")
+    else:
+        print "Synchronizing reference traces from web."
+        urllib.urlretrieve(refUrl + refTarName, refTarName)
+        os.system("tar -xjf " + refTarName)
+
+    print "Done."
+
+    if not os.path.exists(refDirName):
+        print "Reference traces directory does not exist"
+        return 3
+    
+    bad = []
+
 
     for test in tests:
         result = run_test(test)
         if result == 0:
             if generate:
-                print "GENERATE" + test
+                print "GENERATE " + test
             else:
                 print "PASS " + test
         else:

--- a/regression/tracediff.py	Tue Apr 01 17:05:54 2008 -0700
+++ b/regression/tracediff.py	Wed Apr 02 21:33:31 2008 -0700
@@ -9,28 +9,24 @@
 def run_test(verbose, generate, refDirName, testName):
     """Execute a test."""
 
-    repoName = "ns-3-ref-traces/"
-    refDirName = testName + ".ref"
+    refTestDirName = refDirName + "/" + testName + ".ref"
 
-    if not os.path.exists(repoName):
+    if not os.path.exists(refDirName):
         print"No reference trace repository"
         return 1
 
     if generate:
-        if not os.path.exists(repoName + refDirName):
-            print "creating new " + repoName + refDirName
-            os.mkdir(repoName + refDirName)
+        if not os.path.exists(refTestDirName):
+            print "creating new " + refTestDirName
+            os.mkdir(refTestDirName)
 
-        try:
-            os.system("./waf --cwd regression/" + repoName + refDirName +
-                " --run " + testName + " > /dev/null 2>&1")
-        except:
-            sys.exit(1)
+        os.system("./waf --cwd regression/" + refTestDirName +
+            " --run " + testName + " > /dev/null 2>&1")
 
-        print "Remember to commit " + repoName + refDirName
+        print "Remember to commit " + refTestDirName
         return 0
     else:
-        if not os.path.exists(repoName + refDirName):
+        if not os.path.exists(refTestDirName):
             print "Cannot locate reference traces"
             return 1
 
@@ -41,21 +37,20 @@
           testName + " > /dev/null 2>&1")
 
         if verbose:
-            diffCmd = "diff traces " + repoName + refDirName + " | head"
+            diffCmd = "diff traces " + refTestDirName + " | head"
         else:
-            diffCmd = "diff traces " + repoName + refDirName + \
+            diffCmd = "diff traces " + refTestDirName + \
                 " > /dev/null 2>&1"
 
         rc = os.system(diffCmd)
         if rc:
             print "----------"
             print "Traces differ in test: test-" + testName
-            print "Reference traces in directory: " + repoName + \
-                refDirName
+            print "Reference traces in directory: " + refTestDirName
             print "Traces in directory: traces"
             print "Rerun regression test as: " + \
                 "\"python regression.py test-" + testName + "\""
-            print "Then do \"diff -u traces " + repoName + refDirName + \
+            print "Then do \"diff -u traces " + refTestDirName + \
                 "\" for details"
             print "----------"
         return rc

--- a/src/helper/internet-stack-helper.cc	Tue Apr 01 17:05:54 2008 -0700
+++ b/src/helper/internet-stack-helper.cc	Wed Apr 02 21:33:31 2008 -0700
@@ -20,9 +20,13 @@
 #include "internet-stack-helper.h"
 #include "ns3/internet-stack.h"
 #include "ns3/packet-socket-factory.h"
+#include "ns3/config.h"
 
 namespace ns3 {
 
+std::vector<InternetStackHelper::Trace> InternetStackHelper::m_traces;
+std::string InternetStackHelper::m_pcapBaseFilename;
+
 void 
 InternetStackHelper::Build (NodeContainer c)
 {
@@ -35,5 +39,68 @@
     }
 }
 
+void
+InternetStackHelper::EnablePcap (std::string filename)
+{
+  InternetStackHelper::m_pcapBaseFilename = filename;
+  Config::Connect ("/NodeList/*/$ns3::Ipv4L3Protocol/Tx",
+                              MakeCallback (&InternetStackHelper::LogTxIp));
+  Config::Connect ("/NodeList/*/$ns3::Ipv4L3Protocol/Rx",
+                              MakeCallback (&InternetStackHelper::LogRxIp));
+}
+
+uint32_t
+InternetStackHelper::GetNodeIndex (std::string context)
+{
+  std::string::size_type pos;
+  pos = context.find ("/NodeList/");
+  NS_ASSERT (pos == 0);
+  std::string::size_type afterNodeIndex = context.find ("/", 11);
+  NS_ASSERT (afterNodeIndex != std::string::npos);
+  std::string index = context.substr (10, afterNodeIndex - 10);
+  std::istringstream iss;
+  iss.str (index);
+  uint32_t nodeIndex;
+  iss >> nodeIndex;
+  return nodeIndex;
+}
+
+void
+InternetStackHelper::LogTxIp (std::string context, Ptr<const Packet> packet, uint32_t interfaceIndex)
+{
+  Ptr<PcapWriter> writer = InternetStackHelper::GetStream (GetNodeIndex (context), interfaceIndex);
+  writer->WritePacket (packet);
+}
+
+void
+InternetStackHelper::LogRxIp (std::string context, Ptr<const Packet> packet, uint32_t interfaceIndex)
+{
+  Ptr<PcapWriter> writer = InternetStackHelper::GetStream (GetNodeIndex (context), interfaceIndex);
+  writer->WritePacket (packet);
+}
+
+Ptr<PcapWriter>
+InternetStackHelper::GetStream (uint32_t nodeId, uint32_t interfaceId)
+{
+  for (std::vector<Trace>::iterator i = m_traces.begin ();
+       i != m_traces.end (); i++)
+  {
+    if (i->nodeId == nodeId &&
+        i->interfaceId == interfaceId)
+    {
+      return i->writer;
+    }
+  }
+  InternetStackHelper::Trace trace;
+  trace.nodeId = nodeId;
+  trace.interfaceId = interfaceId;
+  trace.writer = Create<PcapWriter> ();
+  std::ostringstream oss;
+  oss << m_pcapBaseFilename << "-" << nodeId << "-" << interfaceId << ".pcap";
+  trace.writer->Open (oss.str ());
+  trace.writer->WriteIpHeader ();
+  m_traces.push_back (trace);
+  return trace.writer;
+}
 
 } // namespace ns3

--- a/src/helper/internet-stack-helper.h	Tue Apr 01 17:05:54 2008 -0700
+++ b/src/helper/internet-stack-helper.h	Wed Apr 02 21:33:31 2008 -0700
@@ -21,6 +21,9 @@
 #define INTERNET_STACK_HELPER_H
 
 #include "node-container.h"
+#include "net-device-container.h"
+#include "ns3/pcap-writer.h"
+#include "ns3/packet.h"
 
 namespace ns3 {
 
@@ -37,6 +40,27 @@
    * of the ns3::Ipv4, ns3::Udp, and, ns3::Tcp classes.
    */
   void Build (NodeContainer c);
+
+  /**
+   * \param filename filename prefix to use for pcap files.
+   *
+   * Enable pcap output on each protocol instance which is of the
+   * ns3::Ipv4L3Protocol type.  Both Tx and Rx events will be logged.
+   */
+  static void EnablePcap (std::string filename);
+
+private:
+  static void LogRxIp (std::string context, Ptr<const Packet> packet, uint32_t deviceId);
+  static void LogTxIp (std::string context, Ptr<const Packet> packet, uint32_t deviceId);
+  static Ptr<PcapWriter> GetStream (uint32_t nodeId, uint32_t interfaceId);
+  struct Trace {
+    uint32_t nodeId;
+    uint32_t interfaceId;
+    Ptr<PcapWriter> writer;
+  };
+  static std::string m_pcapBaseFilename;
+  static uint32_t GetNodeIndex (std::string context);
+  static std::vector<Trace> m_traces;
 };
 
 } // namespace ns3