mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 00:00:29 +03:00
75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/*
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* Copyright (c) 2023, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*
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*/
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#ifndef KADDHT_H__
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#define KADDHT_H__
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#include <memory>
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#include <vector>
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#include <sstream>
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#include <functional>
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#include "RouterInfo.h"
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// Kademlia DHT (XOR distance)
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namespace i2p
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{
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namespace data
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{
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struct DHTNode
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{
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DHTNode * zero, * one;
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std::shared_ptr<RouterInfo> router;
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DHTNode ();
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~DHTNode ();
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bool IsEmpty () const { return !zero && !one && !router; };
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void MoveRouterUp (bool fromOne);
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};
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class DHTTable
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{
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typedef std::function<bool (const std::shared_ptr<RouterInfo>&)> Filter;
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public:
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DHTTable ();
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~DHTTable ();
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void Insert (const std::shared_ptr<RouterInfo>& r);
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bool Remove (const IdentHash& h);
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std::shared_ptr<RouterInfo> FindClosest (const IdentHash& h, const Filter& filter = nullptr);
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std::vector<std::shared_ptr<RouterInfo> > FindClosest (const IdentHash& h, size_t num, const Filter& filter = nullptr);
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void Print (std::stringstream& s);
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size_t GetSize () const { return m_Size; };
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void Clear ();
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void Cleanup (Filter filter);
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private:
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void Insert (const std::shared_ptr<RouterInfo>& r, DHTNode * root, int level); // recursive
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bool Remove (const IdentHash& h, DHTNode * root, int level);
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std::shared_ptr<RouterInfo> FindClosest (const IdentHash& h, DHTNode * root, int level);
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void FindClosest (const IdentHash& h, size_t num, DHTNode * root, int level, std::vector<std::shared_ptr<RouterInfo> >& hashes);
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void Cleanup (DHTNode * root);
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void Print (std::stringstream& s, DHTNode * root, int level);
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private:
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DHTNode * m_Root;
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size_t m_Size;
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// transient
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Filter m_Filter;
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};
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}
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}
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#endif
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