--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/internet-stack/sequence-number.h	Mon Jun 09 15:40:22 2008 -0700
@@ -0,0 +1,66 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+//
+// Copyright (c) 2006 Georgia Tech Research Corporation
+//
+// 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: Rajib Bhattacharjea<raj.b@gatech.edu>
+//
+
+// Ported from:
+// Georgia Tech Network Simulator - Manage 32 bit unsigned sequence numbers
+// George F. Riley.  Georgia Tech, Spring 2002
+
+// Class to manage arithmetic operations on sequence numbers (mod 2^32)
+
+#ifndef __seq_h__
+#define __seq_h__
+
+#include <stdint.h>
+
+#define MAX_SEQ ((uint32_t)0xffffffff)
+
+class SequenceNumber {
+public:
+  SequenceNumber () : seq(0) { }
+  SequenceNumber (const uint32_t s) : seq (s) { }
+
+  operator uint32_t () const { return seq;}
+
+  SequenceNumber& operator= (const uint32_t s) { seq = s; return *this;}
+
+  SequenceNumber& operator+= (const uint32_t s) { seq += s; return *this;}
+  SequenceNumber  operator++ ()              { seq++; return *this;}
+  SequenceNumber  operator++ (int)           { SequenceNumber ss (seq); seq++; return ss;}
+  SequenceNumber& operator-= (const uint32_t s) { seq -= s; return *this;}
+  SequenceNumber  operator-- ()              { seq--; return *this;}
+  SequenceNumber  operator-- (int)           { SequenceNumber ss (seq); seq--; return ss;}
+public:
+  uint32_t seq;
+};
+
+// Comparison operators
+
+bool operator< (const SequenceNumber l, const SequenceNumber r);
+bool operator<= (const SequenceNumber l, const SequenceNumber r); 
+bool operator> (const SequenceNumber l, const SequenceNumber r);
+bool operator>= (const SequenceNumber l, const SequenceNumber r);
+
+// Non-member arithmetic operators
+SequenceNumber  operator+ (const SequenceNumber l, const SequenceNumber r);
+SequenceNumber  operator- (const SequenceNumber l, const SequenceNumber r);
+
+#endif
+
+