mirror of
https://github.com/PurpleI2P/i2pd.git
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73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/*
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* Copyright (c) 2026, 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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#ifndef IDENT_METRICS_H__
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#define IDENT_METRICS_H__
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#include <inttypes.h>
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#include <string.h>
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#include <unordered_map>
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#include "Tag.h"
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#include "Identity.h"
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#include "Crypto.h"
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namespace i2p
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{
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namespace data
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{
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// kademlia
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struct XORMetric
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{
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union
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{
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uint8_t metric[32];
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uint64_t metric_ll[4];
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};
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void SetMin () { memset (metric, 0, 32); };
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void SetMax () { memset (metric, 0xFF, 32); };
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bool operator< (const XORMetric& other) const { return memcmp (metric, other.metric, 32) < 0; };
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};
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IdentHash CreateRoutingKey (const IdentHash& ident, bool nextDay = false);
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XORMetric operator^(const IdentHash& key1, const IdentHash& key2);
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// peer ordering
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constexpr uint64_t PEER_ORDERING_INACTIVITY_TIMEOUT = 400; // in seconds
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class PeerOrdering
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{
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public:
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PeerOrdering ();
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~PeerOrdering ();
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void CleanUp (uint64_t ts);
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void SetKey (const uint8_t * key);
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const Tag<16>& GetKey () const { return m_PeerOrderingKey; }
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int GetPeerOrderingGroup (const IdentHash& routerIdent);
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bool IsFirstHop (const IdentHash& routerIdent) { return !GetPeerOrderingGroup (routerIdent); };
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bool IsLastHop (const IdentHash& routerIdent) { return GetPeerOrderingGroup (routerIdent) & 0x02; }; // IBGW or OBEP
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private:
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int CalculatePeerOrderingGroup (const IdentHash& routerIdent);
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private:
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Tag<16> m_PeerOrderingKey;
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std::unordered_map<IdentHash, std::pair<int, uint64_t> > m_OrderingGroups; // router ident hash -> (group, last request time)
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#if OPENSSL_SIPHASH
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EVP_MD_CTX * m_MDCtx = nullptr;
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#endif
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};
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}
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}
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#endif
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