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1 : : // Copyright (c) 2009-2022 The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : :
5 : : #include <netaddress.h>
6 : : #include <netbase.h>
7 : :
8 : : #include <string>
9 : : #include <type_traits>
10 : : #include <vector>
11 : :
12 : : #ifndef BITCOIN_NET_PERMISSIONS_H
13 : : #define BITCOIN_NET_PERMISSIONS_H
14 : :
15 : : struct bilingual_str;
16 : :
17 : : extern const std::vector<std::string> NET_PERMISSIONS_DOC;
18 : :
19 : : /** Default for -whitelistrelay. */
20 : : constexpr bool DEFAULT_WHITELISTRELAY = true;
21 : : /** Default for -whitelistforcerelay. */
22 : : constexpr bool DEFAULT_WHITELISTFORCERELAY = false;
23 : :
24 : : enum class NetPermissionFlags : uint32_t {
25 : : None = 0,
26 : : // Can query bloomfilter even if -peerbloomfilters is false
27 : : BloomFilter = (1U << 1),
28 : : // Relay and accept transactions from this peer, even if -blocksonly is true
29 : : // This peer is also not subject to limits on how many transaction INVs are tracked
30 : : Relay = (1U << 3),
31 : : // Always relay transactions from this peer, even if already in mempool
32 : : // Keep parameter interaction: forcerelay implies relay
33 : : ForceRelay = (1U << 2) | Relay,
34 : : // Allow getheaders during IBD and block-download after maxuploadtarget limit
35 : : Download = (1U << 6),
36 : : // Can't be banned/disconnected/discouraged for misbehavior
37 : : NoBan = (1U << 4) | Download,
38 : : // Can query the mempool
39 : : Mempool = (1U << 5),
40 : : // Can request addrs without hitting a privacy-preserving cache, and send us
41 : : // unlimited amounts of addrs.
42 : : Addr = (1U << 7),
43 : :
44 : : // True if the user did not specifically set fine-grained permissions with
45 : : // the -whitebind or -whitelist configuration options.
46 : : Implicit = (1U << 31),
47 : : All = BloomFilter | ForceRelay | Relay | NoBan | Mempool | Download | Addr,
48 : : };
49 : 470 : static inline constexpr NetPermissionFlags operator|(NetPermissionFlags a, NetPermissionFlags b)
50 : : {
51 : 470 : using t = typename std::underlying_type<NetPermissionFlags>::type;
52 : 470 : return static_cast<NetPermissionFlags>(static_cast<t>(a) | static_cast<t>(b));
53 : : }
54 : :
55 : : class NetPermissions
56 : : {
57 : : public:
58 : : NetPermissionFlags m_flags;
59 : : static std::vector<std::string> ToStrings(NetPermissionFlags flags);
60 : 1016904 : static inline bool HasFlag(NetPermissionFlags flags, NetPermissionFlags f)
61 : : {
62 : 1016904 : using t = typename std::underlying_type<NetPermissionFlags>::type;
63 [ + + + + : 940110 : return (static_cast<t>(flags) & static_cast<t>(f)) == static_cast<t>(f);
+ + + + +
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+ ][ + + -
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+ - + - #
# # # # #
# # # # #
# # # # #
# # # # #
# # # #
# ]
64 : : }
65 : 479 : static inline void AddFlag(NetPermissionFlags& flags, NetPermissionFlags f)
66 : : {
67 [ + - ]: 963 : flags = flags | f;
68 : 465 : }
69 : : //! ClearFlag is only called with `f` == NetPermissionFlags::Implicit.
70 : : //! If that should change in the future, be aware that ClearFlag should not
71 : : //! be called with a subflag of a multiflag, e.g. NetPermissionFlags::Relay
72 : : //! or NetPermissionFlags::Download, as that would leave `flags` in an
73 : : //! invalid state corresponding to none of the existing flags.
74 : 6 : static inline void ClearFlag(NetPermissionFlags& flags, NetPermissionFlags f)
75 : : {
76 : 6 : assert(f == NetPermissionFlags::Implicit);
77 : 6 : using t = typename std::underlying_type<NetPermissionFlags>::type;
78 [ + + ]: 6 : flags = static_cast<NetPermissionFlags>(static_cast<t>(flags) & ~static_cast<t>(f));
79 : : }
80 : : };
81 : :
82 [ + - ][ + - : 10 : class NetWhitebindPermissions : public NetPermissions
+ - + - +
- + - ]
83 : : {
84 : : public:
85 : : static bool TryParse(const std::string& str, NetWhitebindPermissions& output, bilingual_str& error);
86 : : CService m_service;
87 : : };
88 : :
89 [ + - ]: 1414 : class NetWhitelistPermissions : public NetPermissions
90 : : {
91 : : public:
92 : : static bool TryParse(const std::string& str, NetWhitelistPermissions& output, ConnectionDirection& output_connection_direction, bilingual_str& error);
93 : : CSubNet m_subnet;
94 : : };
95 : :
96 : : #endif // BITCOIN_NET_PERMISSIONS_H
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