mirror of
https://github.com/savoirfairelinux/opendht.git
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96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "node.h"
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namespace dht {
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static constexpr unsigned TARGET_NODES {8};
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namespace net {
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class NetworkEngine;
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}
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struct Bucket
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{
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Bucket()
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: cached()
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{}
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Bucket(sa_family_t af, const InfoHash& f = {}, time_point t = time_point::min())
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: af(af)
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, first(f)
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, time(t)
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, cached()
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{}
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sa_family_t af {0};
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InfoHash first {};
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time_point time {time_point::min()}; /* time of last reply in this bucket */
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std::list<Sp<Node>> nodes {};
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Sp<Node> cached; /* the address of a likely candidate */
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/** Return a random node in a bucket. */
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Sp<Node> randomNode(std::mt19937_64& rd);
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void sendCachedPing(net::NetworkEngine& ne);
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void connectivityChanged()
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{
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time = time_point::min();
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for (auto& node : nodes)
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node->setTime(time_point::min());
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}
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};
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class RoutingTable : public std::list<Bucket>
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{
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public:
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using std::list<Bucket>::list;
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time_point grow_time {time_point::min()};
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bool is_client {false};
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InfoHash middle(const RoutingTable::const_iterator&) const;
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std::vector<Sp<Node>> findClosestNodes(const InfoHash id, time_point now, size_t count = TARGET_NODES) const;
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RoutingTable::iterator findBucket(const InfoHash& id);
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RoutingTable::const_iterator findBucket(const InfoHash& id) const;
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/**
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* Return true if the id is in the bucket's range.
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*/
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inline bool contains(const RoutingTable::const_iterator& bucket, const InfoHash& id) const
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{
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return InfoHash::cmp(bucket->first, id) <= 0
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&& (std::next(bucket) == end() || InfoHash::cmp(id, std::next(bucket)->first) < 0);
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}
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/**
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* Return true if the table has no bucket ore one empty buket.
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*/
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inline bool isEmpty() const { return empty() || (size() == 1 && front().nodes.empty()); }
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void connectivityChanged(const time_point& now)
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{
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grow_time = now;
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for (auto& b : *this)
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b.connectivityChanged();
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}
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bool onNewNode(
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const Sp<Node>& node, int comfirm, const time_point& now, const InfoHash& myid, net::NetworkEngine& ne);
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/**
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* Return a random id in the bucket's range.
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*/
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InfoHash randomId(const RoutingTable::const_iterator& bucket, std::mt19937_64& rd) const;
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unsigned depth(const RoutingTable::const_iterator& bucket) const;
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/**
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* Split a bucket in two equal parts.
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*/
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bool split(const RoutingTable::iterator& b);
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};
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} // namespace dht
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