DwmIpv6Prefix.hh

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//===========================================================================
// @(#) $DwmPath$
//===========================================================================
//  Copyright (c) Daniel W. McRobb 2005-2006, 2016, 2023, 2024
//  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.
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//  DANIEL W. MCROBB HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
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//  WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
//  PURPOSE, OR THAT THE USE OF THIS SOFTWARE WILL NOT INFRINGE ANY
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//===========================================================================
 
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
 
#ifndef _DWMIPV6PREFIX_HH_
#define _DWMIPV6PREFIX_HH_
 
#include "DwmIpv6Address.hh"
 
namespace Dwm {
 
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  class Ipv6Prefix
  {
  public:
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv6Prefix();
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv6Prefix(const std::string & prefix);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv6Prefix(const Ipv6Address & network, uint8_t maskLength);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv6Prefix(const Ipv6Prefix & prefix);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv6Address Network() const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline const in6_addr & In6Addr() const
    { return _addr; }
      
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    Ipv6Address Netmask() const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline uint8_t MaskLength() const
    { return _length; }
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint8_t MaskLength(uint8_t maskLen);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Set(const Ipv6Address & network, uint8_t maskLength);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool operator < (const Ipv6Prefix & prefix) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool operator > (const Ipv6Prefix & prefix) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool operator == (const Ipv6Prefix & prefix) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool operator != (const Ipv6Prefix & prefix) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Contains(const Ipv6Address & addr) const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ssize_t Read(int fd);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ssize_t Write(int fd) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    size_t Read(FILE *f);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    size_t Write(FILE *f) const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::istream & Read(std::istream & is);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::ostream & Write(std::ostream & os) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int Read(gzFile gzf);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int Write(gzFile gzf) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int BZRead(BZFILE *bzf);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    int BZWrite(BZFILE *bzf) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Read(boost::asio::ip::tcp::socket & s,
              boost::system::error_code & ec);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Write(boost::asio::ip::tcp::socket & s,
               boost::system::error_code & ec) const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Read(boost::asio::local::stream_protocol::socket & s,
              boost::system::error_code & ec);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Write(boost::asio::local::stream_protocol::socket & s,
               boost::system::error_code & ec) const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Read(boost::asio::generic::stream_protocol::socket & s,
              boost::system::error_code & ec);
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Write(boost::asio::generic::stream_protocol::socket & s,
               boost::system::error_code & ec) const;
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    uint64_t StreamedLength() const
    { return (sizeof(_length) + ((_length + 7) >> 3)); }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    friend std::ostream & operator << (std::ostream & os,
                                       const Ipv6Prefix & prefix);
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    std::string ToString() const;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline uint64_t Hash() const
    {
      return XXH32(_addr.s6_addr, (_length + 7) >> 3, 0);
      // return XXH3_64bits(_addr.s6_addr, 16);
  }
    
  private:
    alignas(8) struct in6_addr  _addr;
    uint8_t                     _length;
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    inline uint8_t NumAddrBytes() const
    {
      return((_length + 7) >> 3);
    }
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    template <typename S>
    requires IsSupportedASIOSocket<S>
    bool ASIO_Read(S & s, boost::system::error_code & ec)
    {
      using boost::asio::read, boost::asio::buffer;
      bool  rc = false;
      if ((read(s, buffer(&_length, sizeof(_length)), ec) == sizeof(_length))
          && (! ec)) {
        size_t  len = (_length + 7) >> 3;
        if ((read(s, buffer(_addr.s6_addr, len), ec) == sizeof(_length))
          && (! ec)) {
          rc = true;
        }
      }
      return rc;
    }
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    template <typename S>
    requires IsSupportedASIOSocket<S>
    bool ASIO_Write(S & s, boost::system::error_code & ec) const
    {
      using boost::asio::write, boost::asio::buffer;
      bool  rc = false;
      if ((write(s, buffer(&_length, sizeof(_length)), ec) == sizeof(_length))
          && (! ec)) {
        size_t  len = (_length + 7) >> 3;
        if ((write(s, buffer(_addr.s6_addr, len), ec) == sizeof(_addr.s6_addr))
            && (! ec)) {
          rc = true;
        }
      }
      return rc;
    }
    
  };
 
}  // namespace Dwm
 
#endif  // _DWMIPV6PREFIX_HH_
 
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//-------------------------------------------------------------------------