aboutsummaryrefslogtreecommitdiff
path: root/src/netaddress.h
blob: 552abc4119ebafbadec481d5e6dfe598aa9f111d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
// 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