I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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#ifndef NETDB_H__
#define NETDB_H__
#include <inttypes.h>
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#include <set>
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#include <map>
#include <string>
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#include <thread>
#include <boost/filesystem.hpp>
#include "Queue.h"
#include "I2NPProtocol.h"
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#include "RouterInfo.h"
#include "LeaseSet.h"
#include "Tunnel.h"
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namespace i2p
{
namespace data
{
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class RequestedDestination
{
public:
RequestedDestination (const IdentHash& destination, bool isLeaseSet, bool isExploratory = false):
m_Destination (destination), m_IsLeaseSet (isLeaseSet), m_IsExploratory (isExploratory),
m_LastRouter (nullptr), m_LastReplyTunnel (nullptr), m_LastOutboundTunnel (nullptr) {};
const IdentHash& GetDestination () const { return m_Destination; };
int GetNumExcludedPeers () const { return m_ExcludedPeers.size (); };
const std::set<IdentHash>& GetExcludedPeers () { return m_ExcludedPeers; };
const RouterInfo * GetLastRouter () const { return m_LastRouter; };
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const i2p::tunnel::InboundTunnel * GetLastReplyTunnel () const { return m_LastReplyTunnel; };
bool IsExploratory () const { return m_IsExploratory; };
bool IsLeaseSet () const { return m_IsLeaseSet; };
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bool IsExcluded (const IdentHash& ident) const { return m_ExcludedPeers.count (ident); };
I2NPMessage * CreateRequestMessage (const RouterInfo * router, const i2p::tunnel::InboundTunnel * replyTunnel);
I2NPMessage * CreateRequestMessage (const IdentHash& floodfill);
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i2p::tunnel::OutboundTunnel * GetLastOutboundTunnel () const { return m_LastOutboundTunnel; };
void SetLastOutboundTunnel (i2p::tunnel::OutboundTunnel * tunnel) { m_LastOutboundTunnel = tunnel; };
private:
IdentHash m_Destination;
bool m_IsLeaseSet, m_IsExploratory;
std::set<IdentHash> m_ExcludedPeers;
const RouterInfo * m_LastRouter;
const i2p::tunnel::InboundTunnel * m_LastReplyTunnel;
i2p::tunnel::OutboundTunnel * m_LastOutboundTunnel;
};
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class NetDb
{
public:
NetDb ();
~NetDb ();
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void Start ();
void Stop ();
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void AddRouterInfo (uint8_t * buf, int len);
void AddLeaseSet (uint8_t * buf, int len);
RouterInfo * FindRouter (const IdentHash& ident) const;
LeaseSet * FindLeaseSet (const IdentHash& destination) const;
void Subscribe (const IdentHash& ident); // keep LeaseSets upto date
void Unsubscribe (const IdentHash& ident);
void RequestDestination (const char * b32); // in base32
void RequestDestination (const IdentHash& destination, bool isLeaseSet = false);
void HandleDatabaseStoreMsg (uint8_t * buf, size_t len);
void HandleDatabaseSearchReplyMsg (I2NPMessage * msg);
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const RouterInfo * GetRandomNTCPRouter (bool floodfillOnly = false) const;
const RouterInfo * GetRandomRouter (const RouterInfo * compatibleWith = nullptr, bool floodfillOnly = false) const;
void PostI2NPMsg (I2NPMessage * msg);
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private:
bool CreateNetDb(boost::filesystem::path directory);
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void Load (const char * directory);
void SaveUpdated (const char * directory);
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void Run (); // exploratory thread
void Explore ();
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void Publish ();
void ValidateSubscriptions ();
const RouterInfo * GetClosestFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
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RequestedDestination * CreateRequestedDestination (const IdentHash& dest,
bool isLeaseSet, bool isExploratory = false);
void DeleteRequestedDestination (const IdentHash& dest);
void DeleteRequestedDestination (RequestedDestination * dest);
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private:
std::map<IdentHash, LeaseSet *> m_LeaseSets;
std::map<IdentHash, RouterInfo *> m_RouterInfos;
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std::map<IdentHash, RequestedDestination *> m_RequestedDestinations;
std::set<IdentHash> m_Subscriptions;
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bool m_IsRunning;
int m_ReseedRetries;
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std::thread * m_Thread;
i2p::util::Queue<I2NPMessage> m_Queue; // of I2NPDatabaseStoreMsg
static const char m_NetDbPath[];
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};
extern NetDb netdb;
}
}
#endif