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// Copyright (c) 2009-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_NETADDRESS_H
#define BITCOIN_NETADDRESS_H
#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-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_ONION,
NET_INTERNAL,
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{0}; // for scoped/link-local ipv6 addresses
public:
CNetAddr();
explicit CNetAddr(const struct in_addr& ipv4Addr);
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 SetInternal(const std::string& name);
bool SetSpecial(const std::string &strName); // for Tor addresses
bool IsBindAny() const; // INADDR_ANY equivalent
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 (198.18.0.0/15)
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 (deprecated) (2001:10::/28)
bool IsRFC7343() const; // IPv6 ORCHIDv2 (2001:20::/28)
bool IsRFC4862() const; // IPv6 autoconfig (FE80::/64)
bool IsRFC6052() const; // IPv6 well-known prefix for IPv4-embedded address (64:FF9B::/96)
bool IsRFC6145() const; // IPv6 IPv4-translated address (::FFFF:0:0:0/96) (actually defined in RFC2765)
bool IsHeNet() const; // IPv6 Hurricane Electric - https://he.net (2001:0470::/36)
bool IsTor() const;
bool IsLocal() const;
bool IsRoutable() const;
bool IsInternal() const;
bool IsValid() 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;
uint32_t GetNetClass() const;
//! For IPv4, mapped IPv4, SIIT translated IPv4, Teredo, 6to4 tunneled addresses, return the relevant IPv4 address as a uint32.
uint32_t GetLinkedIPv4() const;
//! Whether this address has a linked IPv4 address (see GetLinkedIPv4()).
bool HasLinkedIPv4() const;
// The AS on the BGP path to the node we use to diversify
// peers in AddrMan bucketing based on the AS infrastructure.
// The ip->AS mapping depends on how asmap is constructed.
uint32_t GetMappedAS(const std::vector<bool> &asmap) const;
std::vector<unsigned char> GetGroup(const std::vector<bool> &asmap) const;
std::vector<unsigned char> GetAddrBytes() const { return {std::begin(ip), std::end(ip)}; }
int GetReachabilityFrom(const CNetAddr *paddrPartner = nullptr) const;
explicit 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) { return !(a == b); }
friend bool operator<(const CNetAddr& a, const CNetAddr& b);
SERIALIZE_METHODS(CNetAddr, obj) { READWRITE(obj.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) { return !(a == b); }
friend bool operator<(const CSubNet& a, const CSubNet& b);
SERIALIZE_METHODS(CSubNet, obj) { READWRITE(obj.network, obj.netmask, obj.valid); }
};
/** A combination of a network address (CNetAddr) and a (TCP) port */
class CService : public CNetAddr
{
protected:
uint16_t port; // host order
public:
CService();
CService(const CNetAddr& ip, unsigned short port);
CService(const struct in_addr& ipv4Addr, unsigned short port);
explicit CService(const struct sockaddr_in& addr);
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) { return !(a == 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);
explicit CService(const struct sockaddr_in6& addr);
SERIALIZE_METHODS(CService, obj) { READWRITE(obj.ip, Using<BigEndianFormatter<2>>(obj.port)); }
};
bool SanityCheckASMap(const std::vector<bool>& asmap);
#endif // BITCOIN_NETADDRESS_H
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