text: // Copyright (c) 2009-2016 The Tcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #ifndef TCOIN_NETADDRESS_H
  #define TCOIN_NETADDRESS_H
  
  #if defined(HAVE_CONFIG_H)
  #include "config/tcoin-config.h"
  #endif
  
  #include "compat.h"
  #include "serialize.h"
  
  #include <stdint.h>
  #include <string>
  #include <vector>
  
  enum Network
  {
      NET_UNROUTABLE = 0,
      NET_IPV4,
      NET_IPV6,
      NET_TOR,
  
      NET_MAX,
  };
  
  /** IP address (IPv6, or IPv4 using mapped IPv6 range (::FFFF:0:0/96)) */
  class CNetAddr
  {
      protected:
          unsigned char ip[16]; // in network byte order
          uint32_t scopeId; // for scoped/link-local ipv6 addresses
  
      public:
          CNetAddr();
          CNetAddr(const struct in_addr& ipv4Addr);
          void Init();
          void SetIP(const CNetAddr& ip);
  
          /**
           * Set raw IPv4 or IPv6 address (in network byte order)
           * @note Only NET_IPV4 and NET_IPV6 are allowed for network.
           */
          void SetRaw(Network network, const uint8_t *data);
  
          bool SetSpecial(const std::string &strName); // for Tor addresses
          bool IsIPv4() const;    // IPv4 mapped address (::FFFF:0:0/96, 0.0.0.0/0)
          bool IsIPv6() const;    // IPv6 address (not mapped IPv4, not Tor)
          bool IsRFC1918() const; // IPv4 private networks (10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12)
          bool IsRFC2544() const; // IPv4 inter-network communications (192.18.0.0/15)
          bool IsRFC6598() const; // IPv4 ISP-level NAT (100.64.0.0/10)
          bool IsRFC5737() const; // IPv4 documentation addresses (192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24)
          bool IsRFC3849() const; // IPv6 documentation address (2001:0DB8::/32)
          bool IsRFC3927() const; // IPv4 autoconfig (169.254.0.0/16)
          bool IsRFC3964() const; // IPv6 6to4 tunnelling (2002::/16)
          bool IsRFC4193() const; // IPv6 unique local (FC00::/7)
          bool IsRFC4380() const; // IPv6 Teredo tunnelling (2001::/32)
          bool IsRFC4843() const; // IPv6 ORCHID (2001:10::/28)
          bool IsRFC4862() const; // IPv6 autoconfig (FE80::/64)
          bool IsRFC6052() const; // IPv6 well-known prefix (64:FF9B::/96)
          bool IsRFC6145() const; // IPv6 IPv4-translated address (::FFFF:0:0:0/96)
          bool IsTor() const;
          bool IsLocal() const;
          bool IsRoutable() const;
          bool IsValid() const;
          bool IsMulticast() const;
          enum Network GetNetwork() const;
          std::string ToString() const;
          std::string ToStringIP() const;
          unsigned int GetByte(int n) const;
          uint64_t GetHash() const;
          bool GetInAddr(struct in_addr* pipv4Addr) const;
          std::vector<unsigned char> GetGroup() const;
          int GetReachabilityFrom(const CNetAddr *paddrPartner = NULL) const;
  
          CNetAddr(const struct in6_addr& pipv6Addr, const uint32_t scope = 0);
          bool GetIn6Addr(struct in6_addr* pipv6Addr) const;
  
          friend bool operator==(const CNetAddr& a, const CNetAddr& b);
          friend bool operator!=(const CNetAddr& a, const CNetAddr& b);
          friend bool operator<(const CNetAddr& a, const CNetAddr& b);
  
          ADD_SERIALIZE_METHODS;
  
          template <typename Stream, typename Operation>
          inline void SerializationOp(Stream& s, Operation ser_action) {
              READWRITE(FLATDATA(ip));
          }
  
          friend class CSubNet;
  };
  
  class CSubNet
  {
      protected:
          /// Network (base) address
          CNetAddr network;
          /// Netmask, in network byte order
          uint8_t netmask[16];
          /// Is this value valid? (only used to signal parse errors)
          bool valid;
  
      public:
          CSubNet();
          CSubNet(const CNetAddr &addr, int32_t mask);
          CSubNet(const CNetAddr &addr, const CNetAddr &mask);
  
          //constructor for single ip subnet (<ipv4>/32 or <ipv6>/128)
          explicit CSubNet(const CNetAddr &addr);
  
          bool Match(const CNetAddr &addr) const;
  
          std::string ToString() const;
          bool IsValid() const;
  
          friend bool operator==(const CSubNet& a, const CSubNet& b);
          friend bool operator!=(const CSubNet& a, const CSubNet& b);
          friend bool operator<(const CSubNet& a, const CSubNet& b);
  
          ADD_SERIALIZE_METHODS;
  
          template <typename Stream, typename Operation>
          inline void SerializationOp(Stream& s, Operation ser_action) {
              READWRITE(network);
              READWRITE(FLATDATA(netmask));
              READWRITE(FLATDATA(valid));
          }
  };
  
  /** A combination of a network address (CNetAddr) and a (TCP) port */
  class CService : public CNetAddr
  {
      protected:
          unsigned short port; // host order
  
      public:
          CService();
          CService(const CNetAddr& ip, unsigned short port);
          CService(const struct in_addr& ipv4Addr, unsigned short port);
          CService(const struct sockaddr_in& addr);
          void Init();
          void SetPort(unsigned short portIn);
          unsigned short GetPort() const;
          bool GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const;
          bool SetSockAddr(const struct sockaddr* paddr);
          friend bool operator==(const CService& a, const CService& b);
          friend bool operator!=(const CService& a, const CService& b);
          friend bool operator<(const CService& a, const CService& b);
          std::vector<unsigned char> GetKey() const;
          std::string ToString() const;
          std::string ToStringPort() const;
          std::string ToStringIPPort() const;
  
          CService(const struct in6_addr& ipv6Addr, unsigned short port);
          CService(const struct sockaddr_in6& addr);
  
          ADD_SERIALIZE_METHODS;
  
          template <typename Stream, typename Operation>
          inline void SerializationOp(Stream& s, Operation ser_action) {
              READWRITE(FLATDATA(ip));
              unsigned short portN = htons(port);
              READWRITE(FLATDATA(portN));
              if (ser_action.ForRead())
                   port = ntohs(portN);
          }
  };
  
  #endif // TCOIN_NETADDRESS_H
  