DwmIpv4UdpHeader.hh

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//===========================================================================
// @(#) $DwmPath: dwm/libDwm/tags/libDwm-0.6.0/include/DwmIpv4UdpHeader.hh 8401 $
// @(#) $Id: DwmIpv4UdpHeader.hh 8401 2016-04-17 06:44:31Z dwm $
//===========================================================================
//  Copyright (c) Daniel W. McRobb 2006, 2016
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions
//  are met:
//
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//  3. The names of the authors and copyright holders may not be used to
//     endorse or promote products derived from this software without
//     specific prior written permission.
//
//  IN NO EVENT SHALL DANIEL W. MCROBB BE LIABLE TO ANY PARTY FOR
//  DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
//  INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE,
//  EVEN IF DANIEL W. MCROBB HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//
//  THE SOFTWARE PROVIDED HEREIN IS ON AN "AS IS" BASIS, AND
//  DANIEL W. MCROBB HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
//  UPDATES, ENHANCEMENTS, OR MODIFICATIONS. DANIEL W. MCROBB MAKES NO
//  REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER
//  IMPLIED OR EXPRESS, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//  WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
//  OR THAT THE USE OF THIS SOFTWARE WILL NOT INFRINGE ANY PATENT,
//  TRADEMARK OR OTHER RIGHTS.
//===========================================================================

//---------------------------------------------------------------------------
//---------------------------------------------------------------------------

#ifndef _DWMIPV4UDPHEADER_HH_
#define _DWMIPV4UDPHEADER_HH_

extern "C" {
  #include <sys/types.h>
  #ifdef __linux__
    #define __FAVOR_BSD 1
  #endif
  #include <netinet/udp.h>
  #include <inttypes.h>
}

#include <string>

#include "DwmBZ2Readable.hh"
#include "DwmBZ2Writable.hh"
#include "DwmGZReadable.hh"
#include "DwmGZWritable.hh"
#include "DwmReadable.hh"
#include "DwmWritable.hh"
#include "DwmIpv4PacketHeader.hh"

namespace Dwm {

  class Ipv4UdpPayload;
  
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  class Ipv4UdpHeader
    : public Readable, public Writable,
      public GZReadable, public GZWritable,
      public BZ2Readable, public BZ2Writable
  {
  public:
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4UdpHeader();

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4UdpHeader(const Ipv4PacketHeader & ipHeader);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4UdpHeader(const Ipv4UdpHeader & udpHeader);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4UdpHeader(struct udphdr *udpHdr);

    //------------------------------------------------------------------------
    //   own the underlying memory.
    //------------------------------------------------------------------------
    Ipv4UdpHeader(const struct udphdr & udpHdr);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv4UdpHeader & operator = (const Ipv4UdpHeader & udpHeader);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ~Ipv4UdpHeader();

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t SourcePort() const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t SourcePort(uint16_t port);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t DestinationPort() const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t DestinationPort(uint16_t port);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t UdpLength() const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t UdpLength(uint16_t udpLength);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint16_t UdpChecksum() const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    void SetUdpChecksum(const Ipv4PacketHeader & ipHeader,
                        const std::string & data);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    void SetUdpChecksum(const Ipv4PacketHeader & ipHeader,
                        const Ipv4UdpPayload & data);
    
    uint8_t *End() const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::istream & Read(std::istream & is);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::ostream & Write(std::ostream & os) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ssize_t Read(int fd);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ssize_t Write(int fd) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    size_t Read(FILE * f);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    size_t Write(FILE *f) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint32_t StreamedLength() const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int Read(gzFile gzf);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int Write(gzFile gzf) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int BZRead(BZFILE *bzf);

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int BZWrite(BZFILE *bzf) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool operator == (const Ipv4UdpHeader & udpHeader) const;

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::ostream & PrintXML(std::ostream & os, 
                            const std::string & pre = "") const;
    
  private:
    typedef struct {
      uint16_t  sourcePort;
      uint16_t  destinationPort;
      uint16_t  udpLength;
      uint16_t  checksum;
    } Data;

    Data  *_data;
    bool   _ownData;
  };
  
}  // namespace Dwm

#endif  // _DWMIPV4UDPHEADER_HH_

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