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I2P: End-to-End encrypted and anonymous Internet
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297 lines
10 KiB
297 lines
10 KiB
/* |
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* Copyright (c) 2013-2022, 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_INFO_H__ |
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#define ROUTER_INFO_H__ |
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#include <inttypes.h> |
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#include <string> |
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#include <map> |
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#include <vector> |
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#include <array> |
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#include <iostream> |
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#include <boost/asio.hpp> |
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#include <boost/shared_ptr.hpp> |
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#include "Identity.h" |
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#include "Profiling.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 char ROUTER_INFO_PROPERTY_LEASESETS[] = "netdb.knownLeaseSets"; |
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const char ROUTER_INFO_PROPERTY_ROUTERS[] = "netdb.knownRouters"; |
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const char ROUTER_INFO_PROPERTY_NETID[] = "netId"; |
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const char ROUTER_INFO_PROPERTY_VERSION[] = "router.version"; |
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const char ROUTER_INFO_PROPERTY_FAMILY[] = "family"; |
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const char ROUTER_INFO_PROPERTY_FAMILY_SIG[] = "family.sig"; |
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const char CAPS_FLAG_FLOODFILL = 'f'; |
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const char CAPS_FLAG_HIDDEN = 'H'; |
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const char CAPS_FLAG_REACHABLE = 'R'; |
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const char CAPS_FLAG_UNREACHABLE = 'U'; |
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/* bandwidth flags */ |
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const char CAPS_FLAG_LOW_BANDWIDTH1 = 'K'; /* < 12 KBps */ |
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const char CAPS_FLAG_LOW_BANDWIDTH2 = 'L'; /* 12-48 KBps */ |
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const char CAPS_FLAG_HIGH_BANDWIDTH1 = 'M'; /* 48-64 KBps */ |
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const char CAPS_FLAG_HIGH_BANDWIDTH2 = 'N'; /* 64-128 KBps */ |
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const char CAPS_FLAG_HIGH_BANDWIDTH3 = 'O'; /* 128-256 KBps */ |
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const char CAPS_FLAG_EXTRA_BANDWIDTH1 = 'P'; /* 256-2000 KBps */ |
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const char CAPS_FLAG_EXTRA_BANDWIDTH2 = 'X'; /* > 2000 KBps */ |
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const char CAPS_FLAG_V4 = '4'; |
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const char CAPS_FLAG_V6 = '6'; |
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const char CAPS_FLAG_SSU_TESTING = 'B'; |
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const char CAPS_FLAG_SSU_INTRODUCER = 'C'; |
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const uint8_t COST_NTCP2_PUBLISHED = 3; |
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const uint8_t COST_NTCP2_NON_PUBLISHED = 14; |
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const uint8_t COST_SSU_DIRECT = 9; |
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const uint8_t COST_SSU_THROUGH_INTRODUCERS = 11; |
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const size_t MAX_RI_BUFFER_SIZE = 2048; // if RouterInfo exceeds 2048 we consider it as malformed, might be changed later |
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class RouterInfo: public RoutingDestination |
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{ |
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public: |
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enum SupportedTransports |
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{ |
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eNTCP2V4 = 0x01, |
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eNTCP2V6 = 0x02, |
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eSSUV4 = 0x04, |
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eSSUV6 = 0x08, |
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eNTCP2V6Mesh = 0x10, |
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eAllTransports = 0xFF |
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}; |
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typedef uint8_t CompatibleTransports; |
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enum Caps |
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{ |
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eFloodfill = 0x01, |
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eHighBandwidth = 0x02, |
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eExtraBandwidth = 0x04, |
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eReachable = 0x08, |
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eHidden = 0x10, |
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eUnreachable = 0x20 |
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}; |
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enum AddressCaps |
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{ |
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eV4 = 0x01, |
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eV6 = 0x02, |
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eSSUTesting = 0x04, |
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eSSUIntroducer = 0x08 |
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}; |
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enum TransportStyle |
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{ |
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eTransportUnknown = 0, |
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eTransportNTCP, |
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eTransportSSU |
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}; |
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typedef Tag<32> IntroKey; // should be castable to MacKey and AESKey |
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struct Introducer |
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{ |
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Introducer (): iPort (0), iExp (0) {}; |
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boost::asio::ip::address iHost; |
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int iPort; |
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IntroKey iKey; |
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uint32_t iTag; |
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uint32_t iExp; |
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}; |
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struct SSUExt |
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{ |
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int mtu; |
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IntroKey key; // intro key for SSU |
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std::vector<Introducer> introducers; |
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}; |
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struct NTCP2Ext |
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{ |
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Tag<32> staticKey; |
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Tag<16> iv; |
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}; |
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struct Address |
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{ |
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TransportStyle transportStyle; |
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boost::asio::ip::address host; |
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int port; |
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uint64_t date; |
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uint8_t caps; |
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bool published = false; |
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std::unique_ptr<SSUExt> ssu; // not null for SSU |
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std::unique_ptr<NTCP2Ext> ntcp2; // not null for NTCP2 |
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bool IsCompatible (const boost::asio::ip::address& other) const |
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{ |
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return (IsV4 () && other.is_v4 ()) || |
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(IsV6 () && other.is_v6 ()); |
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} |
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bool operator==(const Address& other) const |
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{ |
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return transportStyle == other.transportStyle && IsNTCP2 () == other.IsNTCP2 () && |
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host == other.host && port == other.port; |
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} |
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bool operator!=(const Address& other) const |
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{ |
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return !(*this == other); |
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} |
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bool IsNTCP2 () const { return (bool)ntcp2; }; |
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bool IsPublishedNTCP2 () const { return IsNTCP2 () && published; }; |
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bool IsReachableSSU () const { return (bool)ssu && (published || !ssu->introducers.empty ()); }; |
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bool UsesIntroducer () const { return (bool)ssu && !ssu->introducers.empty (); }; |
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bool IsIntroducer () const { return caps & eSSUIntroducer; }; |
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bool IsPeerTesting () const { return caps & eSSUTesting; }; |
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bool IsV4 () const { return (caps & AddressCaps::eV4) || (host.is_v4 () && !host.is_unspecified ()); }; |
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bool IsV6 () const { return (caps & AddressCaps::eV6) || (host.is_v6 () && !host.is_unspecified ()); }; |
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}; |
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class Buffer: public std::array<uint8_t, MAX_RI_BUFFER_SIZE> |
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{ |
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public: |
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Buffer () = default; |
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Buffer (const uint8_t * buf, size_t len); |
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}; |
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typedef std::vector<std::shared_ptr<Address> > Addresses; |
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RouterInfo (); |
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RouterInfo (const std::string& fullPath); |
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RouterInfo (const RouterInfo& ) = default; |
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RouterInfo& operator=(const RouterInfo& ) = default; |
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RouterInfo (std::shared_ptr<Buffer>&& buf, size_t len); |
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RouterInfo (const uint8_t * buf, size_t len); |
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~RouterInfo (); |
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std::shared_ptr<const IdentityEx> GetRouterIdentity () const { return m_RouterIdentity; }; |
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void SetRouterIdentity (std::shared_ptr<const IdentityEx> identity); |
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std::string GetIdentHashBase64 () const { return GetIdentHash ().ToBase64 (); }; |
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uint64_t GetTimestamp () const { return m_Timestamp; }; |
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int GetVersion () const { return m_Version; }; |
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Addresses& GetAddresses () { return *m_Addresses; }; // should be called for local RI only, otherwise must return shared_ptr |
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std::shared_ptr<const Address> GetNTCP2AddressWithStaticKey (const uint8_t * key) const; |
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std::shared_ptr<const Address> GetPublishedNTCP2V4Address () const; |
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std::shared_ptr<const Address> GetPublishedNTCP2V6Address () const; |
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std::shared_ptr<const Address> GetSSUAddress (bool v4only = true) const; |
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std::shared_ptr<const Address> GetSSUV6Address () const; |
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std::shared_ptr<const Address> GetYggdrasilAddress () const; |
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void AddSSUAddress (const char * host, int port, const uint8_t * key, int mtu = 0); |
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void AddNTCP2Address (const uint8_t * staticKey, const uint8_t * iv, |
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const boost::asio::ip::address& host = boost::asio::ip::address(), int port = 0, uint8_t caps = 0); |
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bool AddIntroducer (const Introducer& introducer); |
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bool RemoveIntroducer (const boost::asio::ip::udp::endpoint& e); |
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void SetProperty (const std::string& key, const std::string& value); // called from RouterContext only |
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void DeleteProperty (const std::string& key); // called from RouterContext only |
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std::string GetProperty (const std::string& key) const; // called from RouterContext only |
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void ClearProperties () { m_Properties.clear (); }; |
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void SetUnreachableAddressesTransportCaps (uint8_t transports); // bitmask of AddressCaps |
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void UpdateSupportedTransports (); |
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bool IsFloodfill () const { return m_Caps & Caps::eFloodfill; }; |
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bool IsReachable () const { return m_Caps & Caps::eReachable; }; |
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bool IsECIES () const { return m_RouterIdentity->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD; }; |
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bool IsSSU (bool v4only = true) const; |
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bool IsSSUV6 () const; |
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bool IsNTCP2 (bool v4only = true) const; |
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bool IsNTCP2V6 () const; |
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bool IsV6 () const; |
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bool IsV4 () const; |
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bool IsMesh () const; |
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void EnableV6 (); |
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void DisableV6 (); |
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void EnableV4 (); |
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void DisableV4 (); |
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void EnableMesh (); |
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void DisableMesh (); |
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bool IsCompatible (const RouterInfo& other) const { return m_SupportedTransports & other.m_SupportedTransports; }; |
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bool IsReachableFrom (const RouterInfo& other) const { return m_ReachableTransports & other.m_SupportedTransports; }; |
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bool IsReachableBy (CompatibleTransports transports) const { return m_ReachableTransports & transports; }; |
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CompatibleTransports GetCompatibleTransports (bool incoming) const { return incoming ? m_ReachableTransports : m_SupportedTransports; }; |
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bool HasValidAddresses () const { return m_SupportedTransports; }; |
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bool IsHidden () const { return m_Caps & eHidden; }; |
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bool IsHighBandwidth () const { return m_Caps & RouterInfo::eHighBandwidth; }; |
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bool IsExtraBandwidth () const { return m_Caps & RouterInfo::eExtraBandwidth; }; |
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bool IsEligibleFloodfill () const; |
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bool IsPeerTesting (bool v4) const; |
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bool IsIntroducer (bool v4) const; |
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uint8_t GetCaps () const { return m_Caps; }; |
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void SetCaps (uint8_t caps); |
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void SetCaps (const char * caps); |
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void SetUnreachable (bool unreachable) { m_IsUnreachable = unreachable; }; |
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bool IsUnreachable () const { return m_IsUnreachable; }; |
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const uint8_t * GetBuffer () const { return m_Buffer->data (); }; |
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const uint8_t * LoadBuffer (const std::string& fullPath); // load if necessary |
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int GetBufferLen () const { return m_BufferLen; }; |
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void CreateBuffer (const PrivateKeys& privateKeys); |
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bool IsUpdated () const { return m_IsUpdated; }; |
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void SetUpdated (bool updated) { m_IsUpdated = updated; }; |
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bool SaveToFile (const std::string& fullPath); |
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std::shared_ptr<RouterProfile> GetProfile () const; |
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void SaveProfile () { if (m_Profile) m_Profile->Save (GetIdentHash ()); }; |
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void Update (const uint8_t * buf, size_t len); |
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void DeleteBuffer () { m_Buffer = nullptr; }; |
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bool IsNewer (const uint8_t * buf, size_t len) const; |
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/** return true if we are in a router family and the signature is valid */ |
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bool IsFamily(const std::string & fam) const; |
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// implements RoutingDestination |
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std::shared_ptr<const IdentityEx> GetIdentity () const { return m_RouterIdentity; }; |
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void Encrypt (const uint8_t * data, uint8_t * encrypted) const; |
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bool IsDestination () const { return false; }; |
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private: |
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bool LoadFile (const std::string& fullPath); |
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void ReadFromFile (const std::string& fullPath); |
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void ReadFromStream (std::istream& s); |
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void ReadFromBuffer (bool verifySignature); |
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void WriteToStream (std::ostream& s) const; |
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size_t ReadString (char* str, size_t len, std::istream& s) const; |
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void WriteString (const std::string& str, std::ostream& s) const; |
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void ExtractCaps (const char * value); |
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uint8_t ExtractAddressCaps (const char * value) const; |
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template<typename Filter> |
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std::shared_ptr<const Address> GetAddress (Filter filter) const; |
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void UpdateCapsProperty (); |
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private: |
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std::string m_Family; |
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std::shared_ptr<const IdentityEx> m_RouterIdentity; |
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std::shared_ptr<Buffer> m_Buffer; |
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size_t m_BufferLen; |
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uint64_t m_Timestamp; |
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boost::shared_ptr<Addresses> m_Addresses; // TODO: use std::shared_ptr and std::atomic_store for gcc >= 4.9 |
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std::map<std::string, std::string> m_Properties; |
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bool m_IsUpdated, m_IsUnreachable; |
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CompatibleTransports m_SupportedTransports, m_ReachableTransports; |
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uint8_t m_Caps; |
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int m_Version; |
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mutable std::shared_ptr<RouterProfile> m_Profile; |
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}; |
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} |
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} |
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#endif
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