Line data    Source code

       1             : // Copyright (c) 2014-2025 The Dash Core developers
       2             : // Distributed under the MIT/X11 software license, see the accompanying
       3             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4             : 
       5             : #ifndef BITCOIN_NETFULFILLEDMAN_H
       6             : #define BITCOIN_NETFULFILLEDMAN_H
       7             : 
       8             : #include <netaddress.h>
       9             : #include <serialize.h>
      10             : #include <sync.h>
      11             : 
      12             : #include <memory>
      13             : 
      14             : template<typename T>
      15             : class CFlatDB;
      16             : class CNetFulfilledRequestManager;
      17             : 
      18         627 : class NetFulfilledRequestStore
      19             : {
      20             : protected:
      21             :     typedef std::map<std::string, int64_t> fulfilledreqmapentry_t;
      22             :     typedef std::map<CService, fulfilledreqmapentry_t> fulfilledreqmap_t;
      23             : 
      24             : protected:
      25             :     //keep track of what node has/was asked for and when
      26             :     fulfilledreqmap_t mapFulfilledRequests;
      27             :     mutable RecursiveMutex cs_mapFulfilledRequests;
      28             : 
      29             : public:
      30           0 :     SERIALIZE_METHODS(NetFulfilledRequestStore, obj)
      31             :     {
      32           0 :         LOCK(obj.cs_mapFulfilledRequests);
      33           0 :         READWRITE(obj.mapFulfilledRequests);
      34           0 :     }
      35             : 
      36             :     void Clear();
      37             : 
      38             :     std::string ToString() const;
      39             : };
      40             : 
      41             : // Fulfilled requests are used to prevent nodes from asking for the same data on sync
      42             : // and from being banned for doing so too often.
      43             : class CNetFulfilledRequestManager : public NetFulfilledRequestStore
      44             : {
      45             : private:
      46             :     using db_type = CFlatDB<NetFulfilledRequestStore>;
      47             : 
      48             : private:
      49             :     const std::unique_ptr<db_type> m_db;
      50             :     bool is_valid{false};
      51             : 
      52             : public:
      53             :     CNetFulfilledRequestManager(const CNetFulfilledRequestManager&) = delete;
      54             :     CNetFulfilledRequestManager& operator=(const CNetFulfilledRequestManager&) = delete;
      55             :     CNetFulfilledRequestManager();
      56             :     ~CNetFulfilledRequestManager();
      57             : 
      58             :     bool LoadCache(bool load_cache);
      59             : 
      60           0 :     bool IsValid() const { return is_valid; }
      61             :     void CheckAndRemove();
      62             : 
      63             :     void AddFulfilledRequest(const CService& addr, const std::string& strRequest);
      64             :     bool HasFulfilledRequest(const CService& addr, const std::string& strRequest);
      65             : 
      66             :     void RemoveAllFulfilledRequests(const CService& addr);
      67             : 
      68             :     void DoMaintenance();
      69             : };
      70             : 
      71             : #endif // BITCOIN_NETFULFILLEDMAN_H