Implementing base support for TCP-style window-based limiting on per-FIB-prefix and per-face granularity

Currently, limits are supported only by ndn::fw::Limits forwarding
strategy and only at the very basic (not fully tested) level.
diff --git a/test/fw-per-fib-limits.h b/test/fw-per-fib-limits.h
new file mode 100644
index 0000000..51bd0c4
--- /dev/null
+++ b/test/fw-per-fib-limits.h
@@ -0,0 +1,52 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * 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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef NDNSIM_TEST_FW_PER_FIB_LIMITS_H
+#define NDNSIM_TEST_FW_PER_FIB_LIMITS_H
+
+#include "ns3/test.h"
+#include "ns3/ptr.h"
+
+namespace ns3 {
+namespace ndn {
+
+class Fib;
+namespace fib { class Entry; }
+  
+class FwPerFibLimits : public TestCase
+{
+public:
+  FwPerFibLimits ()
+    : TestCase ("Test for ndn::fw::PerFibLimits")
+  {
+  }
+    
+private:
+  virtual void DoRun ();
+
+  void CheckCurMaxLimit (Ptr<fib::Entry> entry, double amount);
+  void CheckOutstanding (Ptr<fib::Entry> entry, uint32_t amount);
+  // void Check2 (Ptr<fib::Entry> entry);
+};
+  
+} // namespace ndn
+} // namespace ns3
+
+#endif // NDNSIM_TEST_FW_PER_FIB_LIMITS_H