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I2P: End-to-End encrypted and anonymous Internet
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271 lines
10 KiB
271 lines
10 KiB
/* |
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* Copyright (c) 2013-2024, 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 ROUTER_CONTEXT_H__ |
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#define ROUTER_CONTEXT_H__ |
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#include <inttypes.h> |
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#include <string> |
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#include <memory> |
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#include <unordered_set> |
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#include <boost/asio.hpp> |
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#include "Identity.h" |
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#include "RouterInfo.h" |
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#include "Garlic.h" |
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#include "util.h" |
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namespace i2p |
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{ |
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namespace garlic |
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{ |
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class RouterIncomingRatchetSession; |
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} |
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const char ROUTER_INFO[] = "router.info"; |
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const char ROUTER_KEYS[] = "router.keys"; |
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const char NTCP2_KEYS[] = "ntcp2.keys"; |
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const char SSU2_KEYS[] = "ssu2.keys"; |
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const int ROUTER_INFO_UPDATE_INTERVAL = 30*60; // 30 minutes |
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const int ROUTER_INFO_PUBLISH_INTERVAL = 39*60; // in seconds |
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const int ROUTER_INFO_INITIAL_PUBLISH_INTERVAL = 10; // in seconds |
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const int ROUTER_INFO_PUBLISH_INTERVAL_VARIANCE = 105;// in seconds |
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const int ROUTER_INFO_CONFIRMATION_TIMEOUT = 5; // in seconds |
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const int ROUTER_INFO_MAX_PUBLISH_EXCLUDED_FLOODFILLS = 15; |
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const int ROUTER_INFO_CONGESTION_UPDATE_INTERVAL = 12*60; // in seconds |
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const int ROUTER_INFO_CLEANUP_INTERVAL = 102; // in seconds |
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enum RouterStatus |
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{ |
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eRouterStatusOK = 0, |
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eRouterStatusFirewalled = 1, |
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eRouterStatusUnknown = 2, |
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eRouterStatusProxy = 3, |
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eRouterStatusMesh = 4 |
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}; |
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const char* const ROUTER_STATUS_NAMES[] = |
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{ |
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"OK", // 0 |
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"Firewalled", // 1 |
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"Unknown", // 2 |
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"Proxy", // 3 |
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"Mesh" // 4 |
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}; |
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enum RouterError |
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{ |
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eRouterErrorNone = 0, |
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eRouterErrorClockSkew = 1, |
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eRouterErrorOffline = 2, |
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eRouterErrorSymmetricNAT = 3, |
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eRouterErrorFullConeNAT = 4, |
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eRouterErrorNoDescriptors = 5 |
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}; |
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class RouterContext: public i2p::garlic::GarlicDestination |
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{ |
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private: |
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struct NTCP2PrivateKeys |
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{ |
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uint8_t staticPublicKey[32]; |
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uint8_t staticPrivateKey[32]; |
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uint8_t iv[16]; |
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}; |
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struct SSU2PrivateKeys |
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{ |
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uint8_t staticPublicKey[32]; |
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uint8_t staticPrivateKey[32]; |
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uint8_t intro[32]; |
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}; |
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class RouterService: public i2p::util::RunnableServiceWithWork |
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{ |
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public: |
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RouterService (): RunnableServiceWithWork ("Router") {}; |
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auto& GetService () { return GetIOService (); }; |
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void Start () { StartIOService (); }; |
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void Stop () { StopIOService (); }; |
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}; |
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public: |
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RouterContext (); |
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void Init (); |
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void Start (); |
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void Stop (); |
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const i2p::data::PrivateKeys& GetPrivateKeys () const { return m_Keys; }; |
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i2p::data::LocalRouterInfo& GetRouterInfo () { return m_RouterInfo; }; |
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std::shared_ptr<i2p::data::RouterInfo> GetSharedRouterInfo () |
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{ |
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return std::shared_ptr<i2p::data::RouterInfo> (&m_RouterInfo, |
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[](i2p::data::RouterInfo *) {}); |
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} |
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std::shared_ptr<i2p::garlic::GarlicDestination> GetSharedDestination () |
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{ |
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return std::shared_ptr<i2p::garlic::GarlicDestination> (this, |
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[](i2p::garlic::GarlicDestination *) {}); |
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} |
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std::shared_ptr<i2p::data::RouterInfo::Buffer> CopyRouterInfoBuffer () const; |
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const uint8_t * GetNTCP2StaticPublicKey () const { return m_NTCP2Keys ? m_NTCP2Keys->staticPublicKey : nullptr; }; |
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const uint8_t * GetNTCP2StaticPrivateKey () const { return m_NTCP2Keys ? m_NTCP2Keys->staticPrivateKey : nullptr; }; |
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const uint8_t * GetNTCP2IV () const { return m_NTCP2Keys ? m_NTCP2Keys->iv : nullptr; }; |
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i2p::crypto::X25519Keys& GetNTCP2StaticKeys (); |
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const uint8_t * GetSSU2StaticPublicKey () const { return m_SSU2Keys ? m_SSU2Keys->staticPublicKey : nullptr; }; |
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const uint8_t * GetSSU2StaticPrivateKey () const { return m_SSU2Keys ? m_SSU2Keys->staticPrivateKey : nullptr; }; |
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const uint8_t * GetSSU2IntroKey () const { return m_SSU2Keys ? m_SSU2Keys->intro : nullptr; }; |
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i2p::crypto::X25519Keys& GetSSU2StaticKeys (); |
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uint32_t GetUptime () const; // in seconds |
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uint64_t GetLastUpdateTime () const { return m_LastUpdateTime; }; |
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uint64_t GetBandwidthLimit () const { return m_BandwidthLimit; }; |
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uint64_t GetTransitBandwidthLimit () const { return (m_BandwidthLimit*m_ShareRatio)/100LL; }; |
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bool GetTesting () const { return m_Testing; }; |
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void SetTesting (bool testing); |
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RouterStatus GetStatus () const { return m_Status; }; |
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void SetStatus (RouterStatus status); |
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RouterError GetError () const { return m_Error; }; |
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void SetError (RouterError error) { m_Error = error; }; |
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bool GetTestingV6 () const { return m_TestingV6; }; |
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void SetTestingV6 (bool testing); |
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RouterStatus GetStatusV6 () const { return m_StatusV6; }; |
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void SetStatusV6 (RouterStatus status); |
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RouterError GetErrorV6 () const { return m_ErrorV6; }; |
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void SetErrorV6 (RouterError error) { m_ErrorV6 = error; }; |
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int GetNetID () const { return m_NetID; }; |
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void SetNetID (int netID) { m_NetID = netID; }; |
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bool DecryptTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data); |
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bool DecryptTunnelShortRequestRecord (const uint8_t * encrypted, uint8_t * data); |
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void UpdatePort (int port); // called from Daemon |
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void UpdateAddress (const boost::asio::ip::address& host); // called from SSU2 or Daemon |
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void PublishNTCP2Address (int port, bool publish, bool v4, bool v6, bool ygg); |
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void PublishSSU2Address (int port, bool publish, bool v4, bool v6); |
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bool AddSSU2Introducer (const i2p::data::RouterInfo::Introducer& introducer, bool v4); |
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void RemoveSSU2Introducer (const i2p::data::IdentHash& h, bool v4); |
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void UpdateSSU2Introducer (const i2p::data::IdentHash& h, bool v4, uint32_t iTag, uint32_t iExp); |
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void ClearSSU2Introducers (bool v4); |
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bool IsUnreachable () const; |
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void SetUnreachable (bool v4, bool v6); |
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void SetReachable (bool v4, bool v6); |
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bool IsFloodfill () const { return m_IsFloodfill; }; |
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void SetFloodfill (bool floodfill); |
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void SetFamily (const std::string& family); |
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std::string GetFamily () const; |
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void SetBandwidth (int limit); /* in kilobytes */ |
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void SetBandwidth (char L); /* by letter */ |
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void SetShareRatio (int percents); // 0 - 100 |
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bool AcceptsTunnels () const { return m_AcceptsTunnels; }; |
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void SetAcceptsTunnels (bool acceptsTunnels) { m_AcceptsTunnels = acceptsTunnels; }; |
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int GetCongestionLevel (bool longTerm) const; |
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bool SupportsV6 () const { return m_RouterInfo.IsV6 (); }; |
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bool SupportsV4 () const { return m_RouterInfo.IsV4 (); }; |
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bool SupportsMesh () const { return m_RouterInfo.IsMesh (); }; |
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void SetSupportsV6 (bool supportsV6); |
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void SetSupportsV4 (bool supportsV4); |
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void SetSupportsMesh (bool supportsmesh, const boost::asio::ip::address_v6& host); |
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void SetMTU (int mtu, bool v4); |
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void SetHidden(bool hide) { m_IsHiddenMode = hide; }; |
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bool IsHidden() const { return m_IsHiddenMode; }; |
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bool IsLimitedConnectivity () const { return m_Status == eRouterStatusProxy; }; // TODO: implement other cases |
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i2p::crypto::NoiseSymmetricState& GetCurrentNoiseState () { return m_CurrentNoiseState; }; |
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void UpdateNTCP2V6Address (const boost::asio::ip::address& host); // called from Daemon. TODO: remove |
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void UpdateStats (); |
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void UpdateTimestamp (uint64_t ts); // in seconds, called from NetDb before publishing |
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// implements LocalDestination |
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std::shared_ptr<const i2p::data::IdentityEx> GetIdentity () const override{ return m_Keys.GetPublic (); }; |
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bool Decrypt (const uint8_t * encrypted, uint8_t * data, i2p::data::CryptoKeyType preferredCrypto) const override; |
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void SetLeaseSetUpdated (bool post) override {}; |
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// implements GarlicDestination |
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std::shared_ptr<const i2p::data::LocalLeaseSet> GetLeaseSet () override { return nullptr; }; |
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std::shared_ptr<i2p::tunnel::TunnelPool> GetTunnelPool () const override; |
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// override GarlicDestination |
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void ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg) override; |
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void ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg) override; |
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void SubmitECIESx25519Key (const uint8_t * key, uint64_t tag) override; |
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protected: |
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// implements GarlicDestination |
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void HandleI2NPMessage (const uint8_t * buf, size_t len) override; |
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bool HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len, uint32_t msgID) override; |
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private: |
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void CreateNewRouter (); |
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void NewRouterInfo (); |
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void UpdateRouterInfo (); |
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void NewNTCP2Keys (); |
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void NewSSU2Keys (); |
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void UpdateNTCP2Keys (); |
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void UpdateSSU2Keys (); |
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bool Load (); |
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void SaveKeys (); |
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void Sign (const uint8_t * buf, int len, uint8_t * signature) const { m_Keys.Sign (buf, len, signature); }; |
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uint16_t SelectRandomPort () const; |
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void PublishNTCP2Address (std::shared_ptr<i2p::data::RouterInfo::Address> address, int port, bool publish) const; |
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bool DecryptECIESTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data, size_t clearTextSize); |
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void PostGarlicMessage (std::shared_ptr<I2NPMessage> msg); |
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void PostDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg); |
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void ScheduleInitialPublish (); |
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void HandleInitialPublishTimer (const boost::system::error_code& ecode); |
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void SchedulePublish (); |
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void HandlePublishTimer (const boost::system::error_code& ecode); |
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void Publish (); |
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void SchedulePublishResend (); |
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void HandlePublishResendTimer (const boost::system::error_code& ecode); |
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void ScheduleCongestionUpdate (); |
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void HandleCongestionUpdateTimer (const boost::system::error_code& ecode); |
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void UpdateCongestion (); |
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void ScheduleCleanupTimer (); |
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void HandleCleanupTimer (const boost::system::error_code& ecode); |
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private: |
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i2p::data::LocalRouterInfo m_RouterInfo; |
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i2p::data::PrivateKeys m_Keys; |
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std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor, m_TunnelDecryptor; |
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std::shared_ptr<i2p::garlic::RouterIncomingRatchetSession> m_ECIESSession; |
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uint64_t m_LastUpdateTime; // in seconds |
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bool m_AcceptsTunnels, m_IsFloodfill; |
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uint64_t m_StartupTime; // monotonic seconds |
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uint64_t m_BandwidthLimit; // allowed bandwidth |
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int m_ShareRatio; |
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RouterStatus m_Status, m_StatusV6; |
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RouterError m_Error, m_ErrorV6; |
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bool m_Testing, m_TestingV6; |
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int m_NetID; |
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std::unique_ptr<NTCP2PrivateKeys> m_NTCP2Keys; |
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std::unique_ptr<SSU2PrivateKeys> m_SSU2Keys; |
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std::unique_ptr<i2p::crypto::X25519Keys> m_NTCP2StaticKeys, m_SSU2StaticKeys; |
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// for ECIESx25519 |
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i2p::crypto::NoiseSymmetricState m_InitialNoiseState, m_CurrentNoiseState; |
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// publish |
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std::unique_ptr<RouterService> m_Service; |
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std::unique_ptr<boost::asio::deadline_timer> m_PublishTimer, m_CongestionUpdateTimer, m_CleanupTimer; |
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std::unordered_set<i2p::data::IdentHash> m_PublishExcluded; |
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uint32_t m_PublishReplyToken; |
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bool m_IsHiddenMode; // not publish |
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mutable std::mutex m_RouterInfoMutex; |
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}; |
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extern RouterContext context; |
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} |
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#endif
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