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/*
* Copyright (C) 2009-2010 Big Muscle, http://strongdc.sourceforge.net/
*
* 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 2 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 "Constants.h"
#include "dcpp/CID.h"
#include "dcpp/Client.h"
#include "dcpp/MerkleTree.h"
#include "dcpp/Pointer.h"
#include "dcpp/SimpleXML.h"
#include "dcpp/TimerManager.h"
#include "dcpp/User.h"
namespace dht
{
struct UDPKey
{
string ip;
CID key;
};
struct Node :
public OnlineUser
{
typedef dcpp::intrusive_ptr<Node> Ptr;
typedef std::map<CID, Node::Ptr> Map;
Node(const UserPtr& u);
~Node() throw() {}
uint8_t getType() const { return type; }
bool isIpVerified() const { return ipVerified; }
bool isOnline() const { return online; }
void setOnline(bool _online) { online = _online; }
void setAlive();
void setIpVerified(bool verified) { ipVerified = verified; }
void setTimeout(uint64_t now = GET_TICK());
CID getUdpKey() const;
void setUdpKey(const CID& _key);
const UDPKey& getUDPKey() const { return key; }
private:
friend class KBucket;
UDPKey key;
uint64_t created;
uint64_t expires;
uint8_t type;
bool ipVerified;
bool online; // getUser()->isOnline() returns true when node is online in any hub, we need info when he is online in DHT
};
class KBucket
{
public:
KBucket(void);
~KBucket(void);
typedef std::deque<Node::Ptr> NodeList;
/** Creates new (or update existing) node which is NOT added to our routing table */
Node::Ptr createNode(const UserPtr& u, const string& ip, const std::string &port, bool update, bool isUdpKeyValid);
/** Adds node to routing table */
bool insert(const Node::Ptr& node);
/** Finds "max" closest nodes and stores them to the list */
void getClosestNodes(const CID& cid, Node::Map& closest, unsigned int max, uint8_t maxType) const;
/** Return list of all nodes in this bucket */
const NodeList& getNodes() const { return nodes; }
/** Removes dead nodes */
bool checkExpiration(uint64_t currentTime);
/** Loads existing nodes from disk */
void loadNodes(SimpleXML& xml);
/** Save bootstrap nodes to disk */
void saveNodes(SimpleXML& xml);
private:
/** List of nodes in this bucket */
NodeList nodes;
/** List of known IPs in this bucket */
StringSet ipMap;
};
}
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