mirror of
https://github.com/PurpleI2P/i2pd.git
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198 lines
8.7 KiB
C++
198 lines
8.7 KiB
C++
/*
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* Copyright (c) 2013-2023, 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 NETDB_H__
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#define NETDB_H__
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// this file is called NetDb.hpp to resolve conflict with libc's netdb.h on case insensitive fs
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#include <inttypes.h>
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#include <set>
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#include <unordered_map>
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#include <string>
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#include <thread>
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#include <mutex>
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#include "Base.h"
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#include "Gzip.h"
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#include "FS.h"
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#include "Queue.h"
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#include "I2NPProtocol.h"
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#include "RouterInfo.h"
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#include "LeaseSet.h"
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#include "Tunnel.h"
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#include "TunnelPool.h"
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#include "Reseed.h"
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#include "NetDbRequests.h"
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#include "Family.h"
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#include "version.h"
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#include "util.h"
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#include "KadDHT.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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const int NETDB_MIN_ROUTERS = 90;
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const int NETDB_MIN_FLOODFILLS = 5;
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const int NETDB_NUM_FLOODFILLS_THRESHOLD = 1500;
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const int NETDB_NUM_ROUTERS_THRESHOLD = 4*NETDB_NUM_FLOODFILLS_THRESHOLD;
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const int NETDB_FLOODFILL_EXPIRATION_TIMEOUT = 60 * 60; // 1 hour, in seconds
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const int NETDB_MIN_EXPIRATION_TIMEOUT = 90 * 60; // 1.5 hours
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const int NETDB_MAX_EXPIRATION_TIMEOUT = 27 * 60 * 60; // 27 hours
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const int NETDB_MAX_OFFLINE_EXPIRATION_TIMEOUT = 180; // in days
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const int NETDB_EXPIRATION_TIMEOUT_THRESHOLD = 2*60; // 2 minutes
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const int NETDB_MIN_HIGHBANDWIDTH_VERSION = MAKE_VERSION_NUMBER(0, 9, 51); // 0.9.51
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const int NETDB_MIN_FLOODFILL_VERSION = MAKE_VERSION_NUMBER(0, 9, 51); // 0.9.51
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const int NETDB_MIN_SHORT_TUNNEL_BUILD_VERSION = MAKE_VERSION_NUMBER(0, 9, 51); // 0.9.51
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/** function for visiting a leaseset stored in a floodfill */
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typedef std::function<void(const IdentHash, std::shared_ptr<LeaseSet>)> LeaseSetVisitor;
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/** function for visiting a router info we have locally */
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typedef std::function<void(std::shared_ptr<const i2p::data::RouterInfo>)> RouterInfoVisitor;
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/** function for visiting a router info and determining if we want to use it */
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typedef std::function<bool(std::shared_ptr<const i2p::data::RouterInfo>)> RouterInfoFilter;
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class NetDb
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{
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public:
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NetDb ();
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~NetDb ();
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void Start ();
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void Stop ();
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std::shared_ptr<const RouterInfo> AddRouterInfo (const uint8_t * buf, int len);
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bool AddRouterInfo (const IdentHash& ident, const uint8_t * buf, int len);
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bool AddLeaseSet (const IdentHash& ident, const uint8_t * buf, int len);
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bool AddLeaseSet2 (const IdentHash& ident, const uint8_t * buf, int len, uint8_t storeType);
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std::shared_ptr<RouterInfo> FindRouter (const IdentHash& ident) const;
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std::shared_ptr<LeaseSet> FindLeaseSet (const IdentHash& destination) const;
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std::shared_ptr<RouterProfile> FindRouterProfile (const IdentHash& ident) const;
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void RequestDestination (const IdentHash& destination, RequestedDestination::RequestComplete requestComplete = nullptr, bool direct = true);
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void RequestDestinationFrom (const IdentHash& destination, const IdentHash & from, bool exploritory, RequestedDestination::RequestComplete requestComplete = nullptr);
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void HandleDatabaseStoreMsg (std::shared_ptr<const I2NPMessage> msg);
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void HandleDatabaseSearchReplyMsg (std::shared_ptr<const I2NPMessage> msg);
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void HandleDatabaseLookupMsg (std::shared_ptr<const I2NPMessage> msg);
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void HandleNTCP2RouterInfoMsg (std::shared_ptr<const I2NPMessage> m);
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std::shared_ptr<const RouterInfo> GetRandomRouter () const;
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std::shared_ptr<const RouterInfo> GetRandomRouter (std::shared_ptr<const RouterInfo> compatibleWith, bool reverse, bool endpoint) const;
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std::shared_ptr<const RouterInfo> GetHighBandwidthRandomRouter (std::shared_ptr<const RouterInfo> compatibleWith, bool reverse, bool endpoint) const;
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std::shared_ptr<const RouterInfo> GetRandomSSU2PeerTestRouter (bool v4, const std::set<IdentHash>& excluded) const;
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std::shared_ptr<const RouterInfo> GetRandomSSU2Introducer (bool v4, const std::set<IdentHash>& excluded) const;
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std::shared_ptr<const RouterInfo> GetClosestFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
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std::vector<IdentHash> GetClosestFloodfills (const IdentHash& destination, size_t num,
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std::set<IdentHash>& excluded, bool closeThanUsOnly = false) const;
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std::shared_ptr<const RouterInfo> GetClosestNonFloodfill (const IdentHash& destination, const std::set<IdentHash>& excluded) const;
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std::shared_ptr<const RouterInfo> GetRandomRouterInFamily (FamilyID fam) const;
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void SetUnreachable (const IdentHash& ident, bool unreachable);
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void ExcludeReachableTransports (const IdentHash& ident, RouterInfo::CompatibleTransports transports);
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void PostI2NPMsg (std::shared_ptr<const I2NPMessage> msg);
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void Reseed ();
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Families& GetFamilies () { return m_Families; };
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// for web interface
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int GetNumRouters () const { return m_RouterInfos.size (); };
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int GetNumFloodfills () const { return m_Floodfills.GetSize (); };
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int GetNumLeaseSets () const { return m_LeaseSets.size (); };
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/** visit all lease sets we currently store */
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void VisitLeaseSets(LeaseSetVisitor v);
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/** visit all router infos we have currently on disk, usually insanely expensive, does not access in memory RI */
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void VisitStoredRouterInfos(RouterInfoVisitor v);
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/** visit all router infos we have loaded in memory, cheaper than VisitLocalRouterInfos but locks access while visiting */
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void VisitRouterInfos(RouterInfoVisitor v);
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/** visit N random router that match using filter, then visit them with a visitor, return number of RouterInfos that were visited */
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size_t VisitRandomRouterInfos(RouterInfoFilter f, RouterInfoVisitor v, size_t n);
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void ClearRouterInfos () { m_RouterInfos.clear (); };
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std::shared_ptr<RouterInfo::Buffer> NewRouterInfoBuffer () { return m_RouterInfoBuffersPool.AcquireSharedMt (); };
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bool PopulateRouterInfoBuffer (std::shared_ptr<RouterInfo> r);
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std::shared_ptr<RouterInfo::Address> NewRouterInfoAddress () { return m_RouterInfoAddressesPool.AcquireSharedMt (); };
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boost::shared_ptr<RouterInfo::Addresses> NewRouterInfoAddresses ()
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{
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return boost::shared_ptr<RouterInfo::Addresses>(m_RouterInfoAddressVectorsPool.AcquireMt (),
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std::bind <void (i2p::util::MemoryPoolMt<RouterInfo::Addresses>::*)(RouterInfo::Addresses *)>
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(&i2p::util::MemoryPoolMt<RouterInfo::Addresses>::ReleaseMt,
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&m_RouterInfoAddressVectorsPool, std::placeholders::_1));
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};
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std::shared_ptr<Lease> NewLease (const Lease& lease) { return m_LeasesPool.AcquireSharedMt (lease); };
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std::shared_ptr<IdentityEx> NewIdentity (const uint8_t * buf, size_t len) { return m_IdentitiesPool.AcquireSharedMt (buf, len); };
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std::shared_ptr<RouterProfile> NewRouterProfile () { return m_RouterProfilesPool.AcquireSharedMt (); };
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uint32_t GetPublishReplyToken () const { return m_PublishReplyToken; };
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private:
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void Load ();
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bool LoadRouterInfo (const std::string& path, uint64_t ts);
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void SaveUpdated ();
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void Run (); // exploratory thread
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void Explore (int numDestinations);
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void Flood (const IdentHash& ident, std::shared_ptr<I2NPMessage> floodMsg);
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void ManageRouterInfos ();
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void ManageLeaseSets ();
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void ManageRequests ();
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void ReseedFromFloodfill(const RouterInfo & ri, int numRouters = 40, int numFloodfills = 20);
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std::shared_ptr<const RouterInfo> AddRouterInfo (const uint8_t * buf, int len, bool& updated);
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std::shared_ptr<const RouterInfo> AddRouterInfo (const IdentHash& ident, const uint8_t * buf, int len, bool& updated);
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template<typename Filter>
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std::shared_ptr<const RouterInfo> GetRandomRouter (Filter filter) const;
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private:
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mutable std::mutex m_LeaseSetsMutex;
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std::unordered_map<IdentHash, std::shared_ptr<LeaseSet> > m_LeaseSets;
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mutable std::mutex m_RouterInfosMutex;
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std::unordered_map<IdentHash, std::shared_ptr<RouterInfo> > m_RouterInfos;
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mutable std::mutex m_FloodfillsMutex;
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DHTTable m_Floodfills;
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bool m_IsRunning;
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std::thread * m_Thread;
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i2p::util::Queue<std::shared_ptr<const I2NPMessage> > m_Queue; // of I2NPDatabaseStoreMsg
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GzipInflator m_Inflator;
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Reseeder * m_Reseeder;
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Families m_Families;
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i2p::fs::HashedStorage m_Storage;
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friend class NetDbRequests;
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NetDbRequests m_Requests;
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bool m_PersistProfiles;
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/** router info we are bootstrapping from or nullptr if we are not currently doing that*/
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std::shared_ptr<RouterInfo> m_FloodfillBootstrap;
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std::set<IdentHash> m_PublishExcluded;
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uint32_t m_PublishReplyToken = 0;
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i2p::util::MemoryPoolMt<RouterInfo::Buffer> m_RouterInfoBuffersPool;
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i2p::util::MemoryPoolMt<RouterInfo::Address> m_RouterInfoAddressesPool;
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i2p::util::MemoryPoolMt<RouterInfo::Addresses> m_RouterInfoAddressVectorsPool;
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i2p::util::MemoryPoolMt<Lease> m_LeasesPool;
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i2p::util::MemoryPoolMt<IdentityEx> m_IdentitiesPool;
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i2p::util::MemoryPoolMt<RouterProfile> m_RouterProfilesPool;
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};
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extern NetDb netdb;
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}
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}
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#endif
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