/usr/include/opendht/routing_table.h is in libopendht-dev 1.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | /*
* Copyright (C) 2014-2017 Savoir-faire Linux Inc.
* Author(s) : Adrien Béraud <adrien.beraud@savoirfairelinux.com>
* Simon Désaulniers <simon.desaulniers@savoirfairelinux.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "node.h"
namespace dht {
static constexpr unsigned TARGET_NODES {8};
namespace net {
class NetworkEngine;
}
struct Bucket {
Bucket() : cached() {}
Bucket(sa_family_t af, const InfoHash& f = {}, time_point t = time_point::min())
: af(af), first(f), time(t), cached() {}
sa_family_t af {0};
InfoHash first {};
time_point time {time_point::min()}; /* time of last reply in this bucket */
std::list<Sp<Node>> nodes {};
Sp<Node> cached; /* the address of a likely candidate */
/** Return a random node in a bucket. */
Sp<Node> randomNode();
void sendCachedPing(net::NetworkEngine& ne);
};
class RoutingTable : public std::list<Bucket> {
public:
using std::list<Bucket>::list;
time_point grow_time {time_point::min()};
bool is_client {false};
InfoHash middle(const RoutingTable::const_iterator&) const;
std::vector<Sp<Node>> findClosestNodes(const InfoHash id, time_point now, size_t count = TARGET_NODES) const;
RoutingTable::iterator findBucket(const InfoHash& id);
RoutingTable::const_iterator findBucket(const InfoHash& id) const;
/**
* Return true if the id is in the bucket's range.
*/
inline bool contains(const RoutingTable::const_iterator& bucket, const InfoHash& id) const {
return InfoHash::cmp(bucket->first, id) <= 0
&& (std::next(bucket) == end() || InfoHash::cmp(id, std::next(bucket)->first) < 0);
}
/**
* Return true if the table has no bucket ore one empty buket.
*/
inline bool isEmpty() const {
return empty() || (size() == 1 && front().nodes.empty());
}
void connectivityChanged(const time_point& now) {
grow_time = now;
for (auto& b : *this)
b.time = time_point::min();
}
bool onNewNode(const Sp<Node>& node, int comfirm, const time_point& now, const InfoHash& myid, net::NetworkEngine& ne);
/**
* Return a random id in the bucket's range.
*/
InfoHash randomId(const RoutingTable::const_iterator& bucket) const;
unsigned depth(const RoutingTable::const_iterator& bucket) const;
/**
* Split a bucket in two equal parts.
*/
bool split(const RoutingTable::iterator& b);
};
}
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