pcap-file-wrapper.h

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2009 University of Washington
 *
 * 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
 */

#ifndef PCAP_FILE_WRAPPER_H
#define PCAP_FILE_WRAPPER_H

#include <cstring>
#include <limits>
#include <fstream>
#include "ns3/ptr.h"
#include "ns3/packet.h"
#include "ns3/object.h"
#include "ns3/nstime.h"
#include "pcap-file.h"

namespace ns3 {

/*
 * A class that wraps a PcapFile as an ns3::Object and provides a higher-layer
 * ns-3 interface to the low-level public methods of PcapFile.  Users are
 * encouraged to use this object instead of class ns3::PcapFile in ns-3
 * public APIs.
 */
class PcapFileWrapper : public Object
{
public:
  static TypeId GetTypeId (void);

  PcapFileWrapper ();
  ~PcapFileWrapper ();


  bool Fail (void) const;
  bool Eof (void) const;
  void Clear (void);

  void Open (std::string const &filename, std::ios::openmode mode);

  void Close (void);

  void Init (uint32_t dataLinkType, 
             uint32_t snapLen = std::numeric_limits<uint32_t>::max (), 
             int32_t tzCorrection = PcapFile::ZONE_DEFAULT);

  void Write (Time t, Ptr<const Packet> p);

  void Write (Time t, Header &header, Ptr<const Packet> p);

  void Write (Time t, uint8_t const *buffer, uint32_t length);

  /*
   * \brief Returns the magic number of the pcap file as defined by the magic_number
   * field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  uint32_t GetMagic (void);

  /*
   * \brief Returns the major version of the pcap file as defined by the version_major
   * field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  uint16_t GetVersionMajor (void);

  /*
   * \brief Returns the minor version of the pcap file as defined by the version_minor
   * field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  uint16_t GetVersionMinor (void);

  /*
   * \brief Returns the time zone offset of the pcap file as defined by the thiszone
   * field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  int32_t GetTimeZoneOffset (void);

  /*
   * \brief Returns the accuracy of timestamps field of the pcap file as defined
   * by the sigfigs field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  uint32_t GetSigFigs (void);

  /*
   * \brief Returns the max length of saved packets field of the pcap file as 
   * defined by the snaplen field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  uint32_t GetSnapLen (void);

  /*
   * \brief Returns the data link type field of the pcap file as defined by the 
   * network field in the pcap global header.
   *
   * See http://wiki.wireshark.org/Development/LibpcapFileFormat
   */ 
  uint32_t GetDataLinkType (void);

private:
  PcapFile m_file;
  uint32_t m_snapLen;
};

} // namespace ns3

#endif /* PCAP_FILE_WRAPPER_H */