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d197977ae2
Save the banlist in `banlist.json` instead of `banlist.dat`. This makes it possible to store Tor v3 entries in the banlist on disk (and any other addresses that cannot be serialized in addrv1 format). Only read `banlist.dat` if it exists and `banlist.json` does not exist (first start after an upgrade). Supersedes https://github.com/bitcoin/bitcoin/pull/20904 Resolves https://github.com/bitcoin/bitcoin/issues/19748
121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_ADDRDB_H
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#define BITCOIN_ADDRDB_H
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#include <fs.h>
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#include <net_types.h> // For banmap_t
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#include <serialize.h>
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#include <univalue.h>
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#include <string>
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#include <vector>
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class CAddress;
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class CAddrMan;
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class CDataStream;
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class CBanEntry
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{
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public:
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static const int CURRENT_VERSION=1;
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int nVersion;
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int64_t nCreateTime;
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int64_t nBanUntil;
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CBanEntry()
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{
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SetNull();
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}
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explicit CBanEntry(int64_t nCreateTimeIn)
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{
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SetNull();
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nCreateTime = nCreateTimeIn;
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}
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/**
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* Create a ban entry from JSON.
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* @param[in] json A JSON representation of a ban entry, as created by `ToJson()`.
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* @throw std::runtime_error if the JSON does not have the expected fields.
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*/
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explicit CBanEntry(const UniValue& json);
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SERIALIZE_METHODS(CBanEntry, obj)
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{
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uint8_t ban_reason = 2; //! For backward compatibility
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READWRITE(obj.nVersion, obj.nCreateTime, obj.nBanUntil, ban_reason);
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}
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void SetNull()
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{
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nVersion = CBanEntry::CURRENT_VERSION;
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nCreateTime = 0;
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nBanUntil = 0;
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}
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/**
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* Generate a JSON representation of this ban entry.
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* @return JSON suitable for passing to the `CBanEntry(const UniValue&)` constructor.
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*/
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UniValue ToJson() const;
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};
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/** Access to the (IP) address database (peers.dat) */
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class CAddrDB
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{
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private:
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fs::path pathAddr;
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public:
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CAddrDB();
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bool Write(const CAddrMan& addr);
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bool Read(CAddrMan& addr);
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static bool Read(CAddrMan& addr, CDataStream& ssPeers);
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};
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/** Access to the banlist databases (banlist.json and banlist.dat) */
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class CBanDB
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{
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private:
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/**
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* JSON key under which the data is stored in the json database.
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*/
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static constexpr const char* JSON_KEY = "banned_nets";
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const fs::path m_banlist_dat;
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const fs::path m_banlist_json;
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public:
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explicit CBanDB(fs::path ban_list_path);
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bool Write(const banmap_t& banSet);
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/**
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* Read the banlist from disk.
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* @param[out] banSet The loaded list. Set if `true` is returned, otherwise it is left
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* in an undefined state.
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* @param[out] dirty Indicates whether the loaded list needs flushing to disk. Set if
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* `true` is returned, otherwise it is left in an undefined state.
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* @return true on success
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*/
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bool Read(banmap_t& banSet, bool& dirty);
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};
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/**
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* Dump the anchor IP address database (anchors.dat)
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*
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* Anchors are last known outgoing block-relay-only peers that are
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* tried to re-connect to on startup.
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*/
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void DumpAnchors(const fs::path& anchors_db_path, const std::vector<CAddress>& anchors);
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/**
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* Read the anchor IP address database (anchors.dat)
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*
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* Deleting anchors.dat is intentional as it avoids renewed peering to anchors after
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* an unclean shutdown and thus potential exploitation of the anchor peer policy.
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*/
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std::vector<CAddress> ReadAnchors(const fs::path& anchors_db_path);
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#endif // BITCOIN_ADDRDB_H
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