--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/internet-stack/tcp-header.h	Mon Jun 09 15:40:22 2008 -0700
@@ -0,0 +1,161 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 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: Raj Bhattacharjea <raj.b@gatech.edu>
+ */
+
+#ifndef TCP_HEADER_H
+#define TCP_HEADER_H
+
+#include <stdint.h>
+#include "ns3/header.h"
+#include "ns3/buffer.h"
+#include "ns3/tcp-socket-factory.h"
+#include "ns3/ipv4-address.h"
+#include "ns3/sequence-number.h"
+
+namespace ns3 {
+
+class TcpHeader : public Header 
+{
+public:
+  TcpHeader ();
+  virtual ~TcpHeader ();
+
+  /**
+   * \brief Enable checksum calculation for TCP (XXX currently has no effect)
+   */
+  static void EnableChecksums (void);
+//Setters
+  /**
+   * \param port The source port for this TcpHeader
+   */
+  void SetSourcePort (uint16_t port);
+  /**
+   * \param port the destination port for this TcpHeader
+   */
+  void SetDestinationPort (uint16_t port);
+  /**
+   * \param sequenceNumber the sequence number for this TcpHeader
+   */
+  void SetSequenceNumber (SequenceNumber sequenceNumber);
+  /**
+   * \param ackNumber the ACK number for this TcpHeader
+   */
+  void SetAckNumber (SequenceNumber ackNumber);
+  /**
+   * \param length the length of this TcpHeader
+   */
+  void SetLength (uint8_t length);
+  /**
+   * \param flags the flags for this TcpHeader
+   */
+  void SetFlags (uint8_t flags);
+  /**
+   * \param windowSize the window size for this TcpHeader
+   */
+  void SetWindowSize (uint16_t windowSize);
+  /**
+   * \param checksum the checksum for this TcpHeader
+   */
+  void SetChecksum (uint16_t checksum);
+  /**
+   * \param urgentPointer the urgent pointer for this TcpHeader
+   */
+  void SetUrgentPointer (uint16_t urgentPointer);
+
+
+//Getters
+  /**
+   * \return The source port for this TcpHeader
+   */
+  uint16_t GetSourcePort () const;
+  /**
+   * \return the destination port for this TcpHeader
+   */
+  uint16_t GetDestinationPort () const;
+  /**
+   * \return the sequence number for this TcpHeader
+   */
+  SequenceNumber GetSequenceNumber () const;
+  /**
+   * \return the ACK number for this TcpHeader
+   */
+  SequenceNumber GetAckNumber () const;
+  /**
+   * \return the length of this TcpHeader
+   */
+  uint8_t  GetLength () const;
+  /**
+   * \return the flags for this TcpHeader
+   */
+  uint8_t  GetFlags () const;
+  /**
+   * \return the window size for this TcpHeader
+   */
+  uint16_t GetWindowSize () const;
+  /**
+   * \return the checksum for this TcpHeader
+   */
+  uint16_t GetChecksum () const;
+  /**
+   * \return the urgent pointer for this TcpHeader
+   */
+  uint16_t GetUrgentPointer () const;
+
+  /**
+   * \param source the ip source to use in the underlying
+   *        ip packet.
+   * \param destination the ip destination to use in the
+   *        underlying ip packet.
+   * \param protocol the protocol number to use in the underlying
+   *        ip packet.
+   *
+   * If you want to use tcp checksums, you should call this
+   * method prior to adding the header to a packet.
+   */
+  void InitializeChecksum (Ipv4Address source, 
+                           Ipv4Address destination,
+                           uint8_t protocol);
+
+  typedef enum { NONE = 0, FIN = 1, SYN = 2, RST = 4, PSH = 8, ACK = 16, 
+    URG = 32} Flags_t;
+
+  static TypeId GetTypeId (void);
+  virtual TypeId GetInstanceTypeId (void) const;
+  virtual void Print (std::ostream &os) const;
+  virtual uint32_t GetSerializedSize (void) const;
+  virtual void Serialize (Buffer::Iterator start) const;
+  virtual uint32_t Deserialize (Buffer::Iterator start);
+
+private:
+  uint16_t m_sourcePort;
+  uint16_t m_destinationPort;
+  uint32_t m_sequenceNumber;
+  uint32_t m_ackNumber;
+  uint8_t m_length; // really a uint4_t
+  uint8_t m_flags;      // really a uint6_t
+  uint16_t m_windowSize;
+  uint16_t m_checksum;
+  uint16_t m_urgentPointer;
+
+  static bool m_calcChecksum;
+};
+
+}; // namespace ns3
+
+#endif /* TCP_HEADER */