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1108 lines
33 KiB
C++
1108 lines
33 KiB
C++
/*
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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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#include <fstream>
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#include <openssl/rand.h>
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#include "Config.h"
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#include "Crypto.h"
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#include "Ed25519.h"
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#include "Timestamp.h"
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#include "I2NPProtocol.h"
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#include "NetDb.hpp"
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#include "FS.h"
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#include "util.h"
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#include "version.h"
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#include "Log.h"
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#include "Family.h"
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#include "ECIESX25519AEADRatchetSession.h"
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#include "RouterContext.h"
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namespace i2p
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{
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RouterContext context;
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RouterContext::RouterContext ():
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m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false),
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m_ShareRatio (100), m_Status (eRouterStatusUnknown), m_StatusV6 (eRouterStatusUnknown),
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m_Error (eRouterErrorNone), m_NetID (I2PD_NET_ID)
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{
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}
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void RouterContext::Init ()
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{
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srand (i2p::util::GetMillisecondsSinceEpoch () % 1000);
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m_StartupTime = std::chrono::steady_clock::now();
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if (!Load ())
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CreateNewRouter ();
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m_Decryptor = m_Keys.CreateDecryptor (nullptr);
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m_TunnelDecryptor = m_Keys.CreateDecryptor (nullptr);
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UpdateRouterInfo ();
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i2p::crypto::InitNoiseNState (m_InitialNoiseState, GetIdentity ()->GetEncryptionPublicKey ());
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m_ECIESSession = std::make_shared<i2p::garlic::RouterIncomingRatchetSession>(m_InitialNoiseState);
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}
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void RouterContext::CreateNewRouter ()
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{
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m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519,
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i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD);
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SaveKeys ();
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NewRouterInfo ();
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}
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void RouterContext::NewRouterInfo ()
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{
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i2p::data::LocalRouterInfo routerInfo;
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routerInfo.SetRouterIdentity (GetIdentity ());
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uint16_t port; i2p::config::GetOption("port", port);
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if (!port)
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{
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port = rand () % (30777 - 9111) + 9111; // I2P network ports range
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if (port == 9150) port = 9151; // Tor browser
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}
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bool ipv4; i2p::config::GetOption("ipv4", ipv4);
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bool ipv6; i2p::config::GetOption("ipv6", ipv6);
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bool ssu; i2p::config::GetOption("ssu", ssu);
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bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
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bool ssu2; i2p::config::GetOption("ssu2.enabled", ssu2);
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bool ygg; i2p::config::GetOption("meshnets.yggdrasil", ygg);
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bool nat; i2p::config::GetOption("nat", nat);
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if ((ntcp2 || ygg) && !m_NTCP2Keys)
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NewNTCP2Keys ();
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if (ssu2 && !m_SSU2Keys)
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NewSSU2Keys ();
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bool ntcp2Published = false;
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if (ntcp2)
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{
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i2p::config::GetOption("ntcp2.published", ntcp2Published);
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if (ntcp2Published)
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{
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std::string ntcp2proxy; i2p::config::GetOption("ntcp2.proxy", ntcp2proxy);
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if (!ntcp2proxy.empty ()) ntcp2Published = false;
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}
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}
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bool ssu2Published = false;
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if (ssu2)
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i2p::config::GetOption("ssu2.published", ssu2Published);
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uint8_t caps = 0, addressCaps = 0;
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if (ipv4)
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{
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std::string host = "127.0.0.1";
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if (!i2p::config::IsDefault("host"))
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i2p::config::GetOption("host", host);
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else if (!nat)
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{
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// we have no NAT so set external address from local address
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std::string address4; i2p::config::GetOption("address4", address4);
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if (!address4.empty ()) host = address4;
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}
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if (ntcp2)
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{
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if (ntcp2Published)
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routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address_v4::from_string (host), port);
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else // add non-published NTCP2 address
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{
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addressCaps = i2p::data::RouterInfo::AddressCaps::eV4;
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routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv);
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}
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}
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if (ssu)
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{
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routerInfo.AddSSUAddress (host.c_str(), port, nullptr);
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caps |= i2p::data::RouterInfo::eReachable; // R
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}
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if (ssu2)
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{
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if (ssu2Published)
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routerInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, boost::asio::ip::address_v4::from_string (host), port);
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else
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{
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addressCaps |= i2p::data::RouterInfo::AddressCaps::eV4;
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routerInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro);
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}
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}
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}
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if (ipv6)
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{
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std::string host = "::1";
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if (!i2p::config::IsDefault("host") && !ipv4) // override if v6 only
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i2p::config::GetOption("host", host);
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else
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{
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std::string address6; i2p::config::GetOption("address6", address6);
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if (!address6.empty ()) host = address6;
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}
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if (ntcp2)
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{
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if (ntcp2Published)
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{
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std::string ntcp2Host;
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if (!i2p::config::IsDefault ("ntcp2.addressv6"))
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i2p::config::GetOption ("ntcp2.addressv6", ntcp2Host);
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else
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ntcp2Host = host;
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routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address_v6::from_string (ntcp2Host), port);
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}
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else
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{
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if (!ipv4) // no other ntcp2 addresses yet
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routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv);
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addressCaps |= i2p::data::RouterInfo::AddressCaps::eV6;
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}
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}
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if (ssu)
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{
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routerInfo.AddSSUAddress (host.c_str(), port, nullptr);
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caps |= i2p::data::RouterInfo::eReachable; // R
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}
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if (ssu2)
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{
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if (ssu2Published)
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routerInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, boost::asio::ip::address_v6::from_string (host), port);
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else
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{
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if (!ipv4) // no other ssu2 addresses yet
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routerInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro);
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addressCaps |= i2p::data::RouterInfo::AddressCaps::eV6;
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}
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}
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}
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if (ygg)
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{
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auto yggaddr = i2p::util::net::GetYggdrasilAddress ();
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if (!yggaddr.is_unspecified ())
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routerInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, yggaddr, port);
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}
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if (addressCaps)
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routerInfo.SetUnreachableAddressesTransportCaps (addressCaps);
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routerInfo.UpdateCaps (caps); // caps + L
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routerInfo.SetProperty ("netId", std::to_string (m_NetID));
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routerInfo.SetProperty ("router.version", I2P_VERSION);
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routerInfo.CreateBuffer (m_Keys);
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m_RouterInfo.SetRouterIdentity (GetIdentity ());
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m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ());
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}
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void RouterContext::UpdateRouterInfo ()
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{
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m_RouterInfo.CreateBuffer (m_Keys);
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m_RouterInfo.SaveToFile (i2p::fs::DataDirPath (ROUTER_INFO));
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m_LastUpdateTime = i2p::util::GetSecondsSinceEpoch ();
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}
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void RouterContext::NewNTCP2Keys ()
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{
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m_NTCP2StaticKeys.reset (new i2p::crypto::X25519Keys ());
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m_NTCP2StaticKeys->GenerateKeys ();
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m_NTCP2Keys.reset (new NTCP2PrivateKeys ());
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m_NTCP2StaticKeys->GetPrivateKey (m_NTCP2Keys->staticPrivateKey);
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memcpy (m_NTCP2Keys->staticPublicKey, m_NTCP2StaticKeys->GetPublicKey (), 32);
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RAND_bytes (m_NTCP2Keys->iv, 16);
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// save
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std::ofstream fk (i2p::fs::DataDirPath (NTCP2_KEYS), std::ofstream::binary | std::ofstream::out);
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fk.write ((char *)m_NTCP2Keys.get (), sizeof (NTCP2PrivateKeys));
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}
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void RouterContext::NewSSU2Keys ()
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{
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m_SSU2StaticKeys.reset (new i2p::crypto::X25519Keys ());
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m_SSU2StaticKeys->GenerateKeys ();
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m_SSU2Keys.reset (new SSU2PrivateKeys ());
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m_SSU2StaticKeys->GetPrivateKey (m_SSU2Keys->staticPrivateKey);
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memcpy (m_SSU2Keys->staticPublicKey, m_SSU2StaticKeys->GetPublicKey (), 32);
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RAND_bytes (m_SSU2Keys->intro, 32);
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// save
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std::ofstream fk (i2p::fs::DataDirPath (SSU2_KEYS), std::ofstream::binary | std::ofstream::out);
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fk.write ((char *)m_SSU2Keys.get (), sizeof (SSU2PrivateKeys));
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}
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void RouterContext::SetStatus (RouterStatus status)
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{
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if (status != m_Status)
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{
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m_Status = status;
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m_Error = eRouterErrorNone;
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switch (m_Status)
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{
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case eRouterStatusOK:
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SetReachable (true, false); // ipv4
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break;
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case eRouterStatusFirewalled:
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SetUnreachable (true, false); // ipv4
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break;
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default:
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;
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}
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}
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}
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void RouterContext::SetStatusV6 (RouterStatus status)
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{
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if (status != m_StatusV6)
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{
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m_StatusV6 = status;
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switch (m_StatusV6)
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{
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case eRouterStatusOK:
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SetReachable (false, true); // ipv6
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break;
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case eRouterStatusFirewalled:
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SetUnreachable (false, true); // ipv6
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break;
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default:
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;
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}
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}
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}
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void RouterContext::UpdatePort (int port)
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{
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bool updated = false;
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (!address->IsNTCP2 () && !address->IsSSU2 () && address->port != port)
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{
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address->port = port;
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updated = true;
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}
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::PublishNTCP2Address (int port, bool publish, bool v4, bool v6, bool ygg)
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{
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if (!m_NTCP2Keys) return;
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bool updated = false;
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (address->IsNTCP2 () && (address->port != port || address->published != publish))
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{
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bool isAddr = v4 && address->IsV4 ();
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if (!isAddr && (v6 || ygg))
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{
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if (i2p::util::net::IsYggdrasilAddress (address->host))
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isAddr = ygg;
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else
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isAddr = v6 && address->IsV6 ();
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}
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if (isAddr)
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{
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if (!port && !address->port)
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{
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// select random port only if address's port is not set
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port = rand () % (30777 - 9111) + 9111; // I2P network ports range
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if (port == 9150) port = 9151; // Tor browser
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}
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if (port) address->port = port;
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address->published = publish;
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memcpy (address->i, m_NTCP2Keys->iv, 16);
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updated = true;
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}
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}
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::UpdateNTCP2Address (bool enable)
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{
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auto& addresses = m_RouterInfo.GetAddresses ();
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bool found = false, updated = false;
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for (auto it = addresses.begin (); it != addresses.end (); ++it)
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{
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if ((*it)->IsNTCP2 ())
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{
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found = true;
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if (!enable)
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{
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addresses.erase (it);
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updated= true;
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}
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break;
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}
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}
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if (enable && !found)
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{
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m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv);
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updated = true;
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::PublishSSU2Address (int port, bool publish, bool v4, bool v6)
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{
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if (!m_SSU2Keys || (publish && !port)) return;
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bool updated = false;
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (address->IsSSU2 () && (address->port != port || address->published != publish) &&
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((v4 && address->IsV4 ()) || (v6 && address->IsV6 ())))
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{
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address->port = port;
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address->published = publish;
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if (publish)
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address->caps |= i2p::data::RouterInfo::eSSUIntroducer;
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else
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address->caps &= ~i2p::data::RouterInfo::eSSUIntroducer;
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updated = true;
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}
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::UpdateSSU2Address (bool enable)
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{
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auto& addresses = m_RouterInfo.GetAddresses ();
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bool found = false, updated = false;
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for (auto it = addresses.begin (); it != addresses.end (); ++it)
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{
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if ((*it)->IsSSU2 ())
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{
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found = true;
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if (!enable)
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{
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addresses.erase (it);
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updated= true;
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}
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break;
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}
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}
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if (enable && !found)
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{
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uint8_t addressCaps = 0;
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bool ipv4; i2p::config::GetOption("ipv4", ipv4);
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bool ipv6; i2p::config::GetOption("ipv6", ipv6);
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if (ipv4) addressCaps |= i2p::data::RouterInfo::AddressCaps::eV4;
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if (ipv6) addressCaps |= i2p::data::RouterInfo::AddressCaps::eV6;
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m_RouterInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, addressCaps);
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updated = true;
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}
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if (updated)
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UpdateRouterInfo ();
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}
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void RouterContext::UpdateAddress (const boost::asio::ip::address& host)
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{
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bool updated = false;
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for (auto& address : m_RouterInfo.GetAddresses ())
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{
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if (address->host != host && address->IsCompatible (host) &&
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!i2p::util::net::IsYggdrasilAddress (address->host))
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{
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address->host = host;
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if (host.is_v6 () && address->transportStyle == i2p::data::RouterInfo::eTransportSSU)
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{
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// update MTU
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auto mtu = i2p::util::net::GetMTU (host);
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if (mtu)
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{
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LogPrint (eLogDebug, "Router: Our v6 MTU=", mtu);
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if (mtu > 1472) { // TODO: magic constant
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mtu = 1472;
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LogPrint(eLogWarning, "Router: MTU dropped to upper limit of 1472 bytes");
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}
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if (address->ssu) address->ssu->mtu = mtu;
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}
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}
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updated = true;
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}
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}
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auto ts = i2p::util::GetSecondsSinceEpoch ();
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if (updated || ts > m_LastUpdateTime + ROUTER_INFO_UPDATE_INTERVAL)
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UpdateRouterInfo ();
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}
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bool RouterContext::AddIntroducer (const i2p::data::RouterInfo::Introducer& introducer)
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{
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bool ret = m_RouterInfo.AddIntroducer (introducer);
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if (ret)
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UpdateRouterInfo ();
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return ret;
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}
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void RouterContext::RemoveIntroducer (const boost::asio::ip::udp::endpoint& e)
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{
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if (m_RouterInfo.RemoveIntroducer (e))
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UpdateRouterInfo ();
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}
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void RouterContext::SetFloodfill (bool floodfill)
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{
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m_IsFloodfill = floodfill;
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if (floodfill)
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m_RouterInfo.UpdateCaps (m_RouterInfo.GetCaps () | i2p::data::RouterInfo::eFloodfill);
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else
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{
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m_RouterInfo.UpdateCaps (m_RouterInfo.GetCaps () & ~i2p::data::RouterInfo::eFloodfill);
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// we don't publish number of routers and leaseset for non-floodfill
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m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS);
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m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS);
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}
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UpdateRouterInfo ();
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}
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std::string RouterContext::GetFamily () const
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{
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return m_RouterInfo.GetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY);
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}
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void RouterContext::SetFamily (const std::string& family)
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{
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std::string signature;
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if (family.length () > 0)
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signature = i2p::data::CreateFamilySignature (family, GetIdentHash ());
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if (signature.length () > 0)
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{
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m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY, family);
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m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG, signature);
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}
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else
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{
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m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY);
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m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG);
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}
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}
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|
void RouterContext::SetBandwidth (char L)
|
|
{
|
|
uint32_t limit = 0;
|
|
enum { low, high, extra, unlim } type = high;
|
|
/* detect parameters */
|
|
switch (L)
|
|
{
|
|
case i2p::data::CAPS_FLAG_LOW_BANDWIDTH1 : limit = 12; type = low; break;
|
|
case i2p::data::CAPS_FLAG_LOW_BANDWIDTH2 : limit = 48; type = low; break;
|
|
case i2p::data::CAPS_FLAG_HIGH_BANDWIDTH1 : limit = 64; type = high; break;
|
|
case i2p::data::CAPS_FLAG_HIGH_BANDWIDTH2 : limit = 128; type = high; break;
|
|
case i2p::data::CAPS_FLAG_HIGH_BANDWIDTH3 : limit = 256; type = high; break;
|
|
case i2p::data::CAPS_FLAG_EXTRA_BANDWIDTH1 : limit = 2048; type = extra; break;
|
|
case i2p::data::CAPS_FLAG_EXTRA_BANDWIDTH2 : limit = 1000000; type = unlim; break; // 1Gbyte/s
|
|
default:
|
|
limit = 48; type = low;
|
|
}
|
|
/* update caps & flags in RI */
|
|
auto caps = m_RouterInfo.GetCaps ();
|
|
caps &= ~i2p::data::RouterInfo::eHighBandwidth;
|
|
caps &= ~i2p::data::RouterInfo::eExtraBandwidth;
|
|
switch (type)
|
|
{
|
|
case low : /* not set */; break;
|
|
case extra : caps |= i2p::data::RouterInfo::eExtraBandwidth; break; // 'P'
|
|
case unlim : caps |= i2p::data::RouterInfo::eExtraBandwidth;
|
|
#if (__cplusplus >= 201703L) // C++ 17 or higher
|
|
[[fallthrough]];
|
|
#endif
|
|
// no break here, extra + high means 'X'
|
|
case high : caps |= i2p::data::RouterInfo::eHighBandwidth; break;
|
|
}
|
|
m_RouterInfo.UpdateCaps (caps);
|
|
UpdateRouterInfo ();
|
|
m_BandwidthLimit = limit;
|
|
}
|
|
|
|
void RouterContext::SetBandwidth (int limit)
|
|
{
|
|
if (limit > 2000) { SetBandwidth('X'); }
|
|
else if (limit > 256) { SetBandwidth('P'); }
|
|
else if (limit > 128) { SetBandwidth('O'); }
|
|
else if (limit > 64) { SetBandwidth('N'); }
|
|
else if (limit > 48) { SetBandwidth('M'); }
|
|
else if (limit > 12) { SetBandwidth('L'); }
|
|
else { SetBandwidth('K'); }
|
|
m_BandwidthLimit = limit; // set precise limit
|
|
}
|
|
|
|
void RouterContext::SetShareRatio (int percents)
|
|
{
|
|
if (percents < 0) percents = 0;
|
|
if (percents > 100) percents = 100;
|
|
m_ShareRatio = percents;
|
|
}
|
|
|
|
bool RouterContext::IsUnreachable () const
|
|
{
|
|
return m_RouterInfo.GetCaps () & i2p::data::RouterInfo::eUnreachable;
|
|
}
|
|
|
|
void RouterContext::RemoveNTCPAddress (bool v4only)
|
|
{
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto it = addresses.begin (); it != addresses.end ();)
|
|
{
|
|
if ((*it)->transportStyle == i2p::data::RouterInfo::eTransportNTCP && !(*it)->IsNTCP2 () &&
|
|
(!v4only || (*it)->host.is_v4 ()))
|
|
{
|
|
it = addresses.erase (it);
|
|
if (v4only) break; // otherwise might be more than one address
|
|
}
|
|
else
|
|
++it;
|
|
}
|
|
}
|
|
|
|
void RouterContext::SetUnreachable (bool v4, bool v6)
|
|
{
|
|
if (v4 || (v6 && !SupportsV4 ()))
|
|
{
|
|
// set caps
|
|
uint8_t caps = m_RouterInfo.GetCaps ();
|
|
caps &= ~i2p::data::RouterInfo::eReachable;
|
|
caps |= i2p::data::RouterInfo::eUnreachable;
|
|
if (v6 || !SupportsV6 ())
|
|
caps &= ~i2p::data::RouterInfo::eFloodfill; // can't be floodfill
|
|
m_RouterInfo.UpdateCaps (caps);
|
|
}
|
|
uint16_t port = 0;
|
|
// delete previous introducers
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto& addr : addresses)
|
|
if (addr->ssu && !addr->IsSSU2 () && ((v4 && addr->IsV4 ()) || (v6 && addr->IsV6 ())))
|
|
{
|
|
addr->published = false;
|
|
addr->caps &= ~i2p::data::RouterInfo::eSSUIntroducer; // can't be introducer
|
|
addr->ssu->introducers.clear ();
|
|
port = addr->port;
|
|
}
|
|
// unpublish NTCP2 addreeses
|
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
|
|
if (ntcp2)
|
|
PublishNTCP2Address (port, false, v4, v6, false);
|
|
// update
|
|
m_RouterInfo.UpdateSupportedTransports ();
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
void RouterContext::SetReachable (bool v4, bool v6)
|
|
{
|
|
if (v4 || (v6 && !SupportsV4 ()))
|
|
{
|
|
// update caps
|
|
uint8_t caps = m_RouterInfo.GetCaps ();
|
|
caps &= ~i2p::data::RouterInfo::eUnreachable;
|
|
caps |= i2p::data::RouterInfo::eReachable;
|
|
if (m_IsFloodfill)
|
|
caps |= i2p::data::RouterInfo::eFloodfill;
|
|
m_RouterInfo.UpdateCaps (caps);
|
|
}
|
|
uint16_t port = 0;
|
|
// delete previous introducers
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto& addr : addresses)
|
|
if (addr->ssu && !addr->IsSSU2 () && ((v4 && addr->IsV4 ()) || (v6 && addr->IsV6 ())))
|
|
{
|
|
addr->published = true;
|
|
addr->caps |= i2p::data::RouterInfo::eSSUIntroducer;
|
|
addr->ssu->introducers.clear ();
|
|
port = addr->port;
|
|
}
|
|
// publish NTCP2
|
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
|
|
if (ntcp2)
|
|
{
|
|
bool published; i2p::config::GetOption ("ntcp2.published", published);
|
|
if (published)
|
|
{
|
|
uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port);
|
|
if (!ntcp2Port) ntcp2Port = port;
|
|
PublishNTCP2Address (ntcp2Port, true, v4, v6, false);
|
|
}
|
|
}
|
|
// update
|
|
m_RouterInfo.UpdateSupportedTransports ();
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
void RouterContext::SetSupportsV6 (bool supportsV6)
|
|
{
|
|
if (supportsV6)
|
|
{
|
|
// insert v6 addresses if necessary
|
|
bool foundSSU = false, foundNTCP2 = false, foundSSU2 = false;
|
|
uint16_t port = 0;
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto& addr: addresses)
|
|
{
|
|
if (addr->IsV6 () && !i2p::util::net::IsYggdrasilAddress (addr->host))
|
|
{
|
|
switch (addr->transportStyle)
|
|
{
|
|
case i2p::data::RouterInfo::eTransportSSU:
|
|
foundSSU = true;
|
|
break;
|
|
case i2p::data::RouterInfo::eTransportNTCP:
|
|
foundNTCP2 = true;
|
|
break;
|
|
case i2p::data::RouterInfo::eTransportSSU2:
|
|
foundSSU2 = true;
|
|
break;
|
|
default: ;
|
|
}
|
|
}
|
|
port = addr->port;
|
|
}
|
|
if (!port) i2p::config::GetOption("port", port);
|
|
// SSU
|
|
if (!foundSSU)
|
|
{
|
|
bool ssu; i2p::config::GetOption("ssu", ssu);
|
|
if (ssu)
|
|
{
|
|
std::string host = "::1"; // TODO: read host
|
|
m_RouterInfo.AddSSUAddress (host.c_str (), port, nullptr);
|
|
}
|
|
}
|
|
// NTCP2
|
|
if (!foundNTCP2)
|
|
{
|
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
|
|
bool ntcp2Published; i2p::config::GetOption("ntcp2.published", ntcp2Published);
|
|
if (ntcp2)
|
|
{
|
|
if (ntcp2Published)
|
|
{
|
|
std::string ntcp2Host;
|
|
if (!i2p::config::IsDefault ("ntcp2.addressv6"))
|
|
i2p::config::GetOption ("ntcp2.addressv6", ntcp2Host);
|
|
else
|
|
ntcp2Host = "::1";
|
|
uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port);
|
|
if (!ntcp2Port) ntcp2Port = port;
|
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address::from_string (ntcp2Host), ntcp2Port);
|
|
}
|
|
else
|
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address(), 0, i2p::data::RouterInfo::eV6);
|
|
}
|
|
}
|
|
// SSU2
|
|
if (!foundSSU2)
|
|
{
|
|
bool ssu2; i2p::config::GetOption("ssu2.enabled", ssu2);
|
|
if (ssu2)
|
|
{
|
|
bool ssu2Published; i2p::config::GetOption("ssu2.published", ssu2Published);
|
|
if (ssu2Published)
|
|
{
|
|
uint16_t ssu2Port; i2p::config::GetOption ("ssu2.port", ssu2Port);
|
|
m_RouterInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, boost::asio::ip::address::from_string ("::1"), ssu2Port);
|
|
}
|
|
else
|
|
m_RouterInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, i2p::data::RouterInfo::eV6);
|
|
}
|
|
}
|
|
m_RouterInfo.EnableV6 ();
|
|
}
|
|
else
|
|
m_RouterInfo.DisableV6 ();
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
void RouterContext::SetSupportsV4 (bool supportsV4)
|
|
{
|
|
// check if updates
|
|
if (supportsV4 && SupportsV4 ()) return;
|
|
if (!supportsV4 && !SupportsV4 ()) return;
|
|
// update
|
|
if (supportsV4)
|
|
{
|
|
bool foundSSU = false, foundNTCP2 = false, foundSSU2 = false;
|
|
std::string host = "127.0.0.1";
|
|
uint16_t port = 0;
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto& addr: addresses)
|
|
{
|
|
if (addr->IsV4 ())
|
|
{
|
|
switch (addr->transportStyle)
|
|
{
|
|
case i2p::data::RouterInfo::eTransportSSU:
|
|
foundSSU = true;
|
|
break;
|
|
case i2p::data::RouterInfo::eTransportNTCP:
|
|
foundNTCP2 = true;
|
|
break;
|
|
case i2p::data::RouterInfo::eTransportSSU2:
|
|
foundSSU2 = true;
|
|
break;
|
|
default: ;
|
|
}
|
|
}
|
|
if (addr->port) port = addr->port;
|
|
}
|
|
if (!port) i2p::config::GetOption("port", port);
|
|
// SSU
|
|
if (!foundSSU)
|
|
{
|
|
bool ssu; i2p::config::GetOption("ssu", ssu);
|
|
if (ssu)
|
|
m_RouterInfo.AddSSUAddress (host.c_str (), port, nullptr);
|
|
}
|
|
// NTCP2
|
|
if (!foundNTCP2)
|
|
{
|
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
|
|
if (ntcp2)
|
|
{
|
|
bool ntcp2Published; i2p::config::GetOption("ntcp2.published", ntcp2Published);
|
|
if (ntcp2Published)
|
|
{
|
|
uint16_t ntcp2Port; i2p::config::GetOption ("ntcp2.port", ntcp2Port);
|
|
if (!ntcp2Port) ntcp2Port = port;
|
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address::from_string (host), ntcp2Port);
|
|
}
|
|
else
|
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, boost::asio::ip::address(), 0, i2p::data::RouterInfo::eV4);
|
|
}
|
|
}
|
|
// SSU2
|
|
if (!foundSSU2)
|
|
{
|
|
bool ssu2; i2p::config::GetOption("ssu2.enabled", ssu2);
|
|
if (ssu2)
|
|
{
|
|
bool ssu2Published; i2p::config::GetOption("ssu2.published", ssu2Published);
|
|
if (ssu2Published)
|
|
{
|
|
uint16_t ssu2Port; i2p::config::GetOption ("ssu2.port", ssu2Port);
|
|
m_RouterInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, boost::asio::ip::address::from_string ("127.0.0.1"), ssu2Port);
|
|
}
|
|
else
|
|
m_RouterInfo.AddSSU2Address (m_SSU2Keys->staticPublicKey, m_SSU2Keys->intro, i2p::data::RouterInfo::eV6);
|
|
}
|
|
}
|
|
m_RouterInfo.EnableV4 ();
|
|
}
|
|
else
|
|
m_RouterInfo.DisableV4 ();
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
void RouterContext::SetSupportsMesh (bool supportsmesh, const boost::asio::ip::address_v6& host)
|
|
{
|
|
if (supportsmesh)
|
|
{
|
|
m_RouterInfo.EnableMesh ();
|
|
uint16_t port = 0;
|
|
i2p::config::GetOption ("ntcp2.port", port);
|
|
if (!port) i2p::config::GetOption("port", port);
|
|
bool foundMesh = false;
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto& addr: addresses)
|
|
{
|
|
if (!port) port = addr->port;
|
|
if (i2p::util::net::IsYggdrasilAddress (addr->host))
|
|
{
|
|
foundMesh = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!foundMesh)
|
|
m_RouterInfo.AddNTCP2Address (m_NTCP2Keys->staticPublicKey, m_NTCP2Keys->iv, host, port);
|
|
}
|
|
else
|
|
m_RouterInfo.DisableMesh ();
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
void RouterContext::UpdateNTCP2V6Address (const boost::asio::ip::address& host)
|
|
{
|
|
bool isYgg = i2p::util::net::IsYggdrasilAddress (host);
|
|
bool updated = false;
|
|
auto& addresses = m_RouterInfo.GetAddresses ();
|
|
for (auto& addr: addresses)
|
|
{
|
|
if (addr->IsPublishedNTCP2 ())
|
|
{
|
|
bool isYgg1 = i2p::util::net::IsYggdrasilAddress (addr->host);
|
|
if (addr->IsV6 () && ((isYgg && isYgg1) || (!isYgg && !isYgg1)))
|
|
{
|
|
if (addr->host != host)
|
|
{
|
|
addr->host = host;
|
|
updated = true;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (updated)
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
void RouterContext::UpdateStats ()
|
|
{
|
|
if (m_IsFloodfill)
|
|
{
|
|
// update routers and leasesets
|
|
m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS, std::to_string(i2p::data::netdb.GetNumLeaseSets ()));
|
|
m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS, std::to_string(i2p::data::netdb.GetNumRouters ()));
|
|
UpdateRouterInfo ();
|
|
}
|
|
}
|
|
|
|
void RouterContext::UpdateTimestamp (uint64_t ts)
|
|
{
|
|
if (ts > m_LastUpdateTime + ROUTER_INFO_UPDATE_INTERVAL)
|
|
UpdateRouterInfo ();
|
|
}
|
|
|
|
bool RouterContext::Load ()
|
|
{
|
|
{
|
|
std::ifstream fk (i2p::fs::DataDirPath (ROUTER_KEYS), std::ifstream::in | std::ifstream::binary);
|
|
if (!fk.is_open ()) return false;
|
|
fk.seekg (0, std::ios::end);
|
|
size_t len = fk.tellg();
|
|
fk.seekg (0, std::ios::beg);
|
|
|
|
if (len == sizeof (i2p::data::Keys)) // old keys file format
|
|
{
|
|
i2p::data::Keys keys;
|
|
fk.read ((char *)&keys, sizeof (keys));
|
|
m_Keys = keys;
|
|
}
|
|
else // new keys file format
|
|
{
|
|
uint8_t * buf = new uint8_t[len];
|
|
fk.read ((char *)buf, len);
|
|
m_Keys.FromBuffer (buf, len);
|
|
delete[] buf;
|
|
}
|
|
}
|
|
std::shared_ptr<const i2p::data::IdentityEx> oldIdentity;
|
|
if (m_Keys.GetPublic ()->GetSigningKeyType () == i2p::data::SIGNING_KEY_TYPE_DSA_SHA1 ||
|
|
m_Keys.GetPublic ()->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ELGAMAL)
|
|
{
|
|
// update keys
|
|
LogPrint (eLogInfo, "Router: router keys are obsolete. Creating new");
|
|
oldIdentity = m_Keys.GetPublic ();
|
|
m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519,
|
|
i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD);
|
|
SaveKeys ();
|
|
}
|
|
// read NTCP2 keys if available
|
|
std::ifstream n2k (i2p::fs::DataDirPath (NTCP2_KEYS), std::ifstream::in | std::ifstream::binary);
|
|
if (n2k)
|
|
{
|
|
n2k.seekg (0, std::ios::end);
|
|
size_t len = n2k.tellg();
|
|
n2k.seekg (0, std::ios::beg);
|
|
if (len == sizeof (NTCP2PrivateKeys))
|
|
{
|
|
m_NTCP2Keys.reset (new NTCP2PrivateKeys ());
|
|
n2k.read ((char *)m_NTCP2Keys.get (), sizeof (NTCP2PrivateKeys));
|
|
}
|
|
n2k.close ();
|
|
}
|
|
// read RouterInfo
|
|
m_RouterInfo.SetRouterIdentity (oldIdentity ? oldIdentity : GetIdentity ());
|
|
i2p::data::RouterInfo routerInfo(i2p::fs::DataDirPath (ROUTER_INFO));
|
|
if (!routerInfo.IsUnreachable ()) // router.info looks good
|
|
{
|
|
m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ());
|
|
if (oldIdentity)
|
|
m_RouterInfo.SetRouterIdentity (GetIdentity ()); // from new keys
|
|
m_RouterInfo.SetProperty ("router.version", I2P_VERSION);
|
|
m_RouterInfo.DeleteProperty ("coreVersion"); // TODO: remove later
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogError, ROUTER_INFO, " is malformed. Creating new");
|
|
NewRouterInfo ();
|
|
}
|
|
|
|
if (IsUnreachable ())
|
|
SetReachable (true, true); // we assume reachable until we discover firewall through peer tests
|
|
|
|
// read NTCP2
|
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2);
|
|
bool ygg; i2p::config::GetOption("meshnets.yggdrasil", ygg);
|
|
if (ntcp2 || ygg)
|
|
{
|
|
if (!m_NTCP2Keys) NewNTCP2Keys ();
|
|
UpdateNTCP2Address (true); // enable NTCP2
|
|
}
|
|
else
|
|
UpdateNTCP2Address (false); // disable NTCP2
|
|
|
|
// read SSU2
|
|
bool ssu2; i2p::config::GetOption("ssu2.enabled", ssu2);
|
|
if (ssu2)
|
|
{
|
|
// read SSU2 keys if available
|
|
std::ifstream s2k (i2p::fs::DataDirPath (SSU2_KEYS), std::ifstream::in | std::ifstream::binary);
|
|
if (s2k)
|
|
{
|
|
s2k.seekg (0, std::ios::end);
|
|
size_t len = s2k.tellg();
|
|
s2k.seekg (0, std::ios::beg);
|
|
if (len == sizeof (SSU2PrivateKeys))
|
|
{
|
|
m_SSU2Keys.reset (new SSU2PrivateKeys ());
|
|
s2k.read ((char *)m_SSU2Keys.get (), sizeof (SSU2PrivateKeys));
|
|
}
|
|
s2k.close ();
|
|
}
|
|
if (!m_SSU2Keys) NewSSU2Keys ();
|
|
UpdateSSU2Address (true); // enable SSU2
|
|
}
|
|
else
|
|
UpdateSSU2Address (false); // disable SSU2
|
|
|
|
return true;
|
|
}
|
|
|
|
void RouterContext::SaveKeys ()
|
|
{
|
|
// save in the same format as .dat files
|
|
std::ofstream fk (i2p::fs::DataDirPath (ROUTER_KEYS), std::ofstream::binary | std::ofstream::out);
|
|
size_t len = m_Keys.GetFullLen ();
|
|
uint8_t * buf = new uint8_t[len];
|
|
m_Keys.ToBuffer (buf, len);
|
|
fk.write ((char *)buf, len);
|
|
delete[] buf;
|
|
}
|
|
|
|
std::shared_ptr<i2p::tunnel::TunnelPool> RouterContext::GetTunnelPool () const
|
|
{
|
|
return i2p::tunnel::tunnels.GetExploratoryPool ();
|
|
}
|
|
|
|
void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t len)
|
|
{
|
|
i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf, len)));
|
|
}
|
|
|
|
bool RouterContext::HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len, uint32_t msgID)
|
|
{
|
|
auto msg = CreateI2NPMessage (typeID, payload, len, msgID);
|
|
if (!msg) return false;
|
|
i2p::HandleI2NPMessage (msg);
|
|
return true;
|
|
}
|
|
|
|
|
|
void RouterContext::ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg)
|
|
{
|
|
std::unique_lock<std::mutex> l(m_GarlicMutex);
|
|
uint8_t * buf = msg->GetPayload ();
|
|
uint32_t len = bufbe32toh (buf);
|
|
if (len > msg->GetLength ())
|
|
{
|
|
LogPrint (eLogWarning, "Router: garlic message length ", len, " exceeds I2NP message length ", msg->GetLength ());
|
|
return;
|
|
}
|
|
buf += 4;
|
|
if (!HandleECIESx25519TagMessage (buf, len)) // try tag first
|
|
{
|
|
// then Noise_N one-time decryption
|
|
if (m_ECIESSession)
|
|
m_ECIESSession->HandleNextMessage (buf, len);
|
|
else
|
|
LogPrint (eLogError, "Router: Session is not set for ECIES router");
|
|
}
|
|
}
|
|
|
|
void RouterContext::ProcessDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg)
|
|
{
|
|
if (i2p::data::netdb.GetPublishReplyToken () == bufbe32toh (msg->GetPayload () + DELIVERY_STATUS_MSGID_OFFSET))
|
|
i2p::data::netdb.PostI2NPMsg (msg);
|
|
else
|
|
{
|
|
std::unique_lock<std::mutex> l(m_GarlicMutex);
|
|
i2p::garlic::GarlicDestination::ProcessDeliveryStatusMessage (msg);
|
|
}
|
|
}
|
|
|
|
void RouterContext::CleanupDestination ()
|
|
{
|
|
std::unique_lock<std::mutex> l(m_GarlicMutex);
|
|
i2p::garlic::GarlicDestination::CleanupExpiredTags ();
|
|
}
|
|
|
|
uint32_t RouterContext::GetUptime () const
|
|
{
|
|
return std::chrono::duration_cast<std::chrono::seconds> (std::chrono::steady_clock::now() - m_StartupTime).count ();
|
|
}
|
|
|
|
bool RouterContext::Decrypt (const uint8_t * encrypted, uint8_t * data, i2p::data::CryptoKeyType preferredCrypto) const
|
|
{
|
|
return m_Decryptor ? m_Decryptor->Decrypt (encrypted, data) : false;
|
|
}
|
|
|
|
bool RouterContext::DecryptTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data)
|
|
{
|
|
return DecryptECIESTunnelBuildRecord (encrypted, data, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE);
|
|
}
|
|
|
|
bool RouterContext::DecryptECIESTunnelBuildRecord (const uint8_t * encrypted, uint8_t * data, size_t clearTextSize)
|
|
{
|
|
// m_InitialNoiseState is h = SHA256(h || hepk)
|
|
m_CurrentNoiseState = m_InitialNoiseState;
|
|
m_CurrentNoiseState.MixHash (encrypted, 32); // h = SHA256(h || sepk)
|
|
uint8_t sharedSecret[32];
|
|
if (!m_TunnelDecryptor->Decrypt (encrypted, sharedSecret))
|
|
{
|
|
LogPrint (eLogWarning, "Router: Incorrect ephemeral public key");
|
|
return false;
|
|
}
|
|
m_CurrentNoiseState.MixKey (sharedSecret);
|
|
encrypted += 32;
|
|
uint8_t nonce[12];
|
|
memset (nonce, 0, 12);
|
|
if (!i2p::crypto::AEADChaCha20Poly1305 (encrypted, clearTextSize, m_CurrentNoiseState.m_H, 32,
|
|
m_CurrentNoiseState.m_CK + 32, nonce, data, clearTextSize, false)) // decrypt
|
|
{
|
|
LogPrint (eLogWarning, "Router: Tunnel record AEAD decryption failed");
|
|
return false;
|
|
}
|
|
m_CurrentNoiseState.MixHash (encrypted, clearTextSize + 16); // h = SHA256(h || ciphertext)
|
|
return true;
|
|
}
|
|
|
|
bool RouterContext::DecryptTunnelShortRequestRecord (const uint8_t * encrypted, uint8_t * data)
|
|
{
|
|
return DecryptECIESTunnelBuildRecord (encrypted, data, SHORT_REQUEST_RECORD_CLEAR_TEXT_SIZE);
|
|
}
|
|
|
|
i2p::crypto::X25519Keys& RouterContext::GetNTCP2StaticKeys ()
|
|
{
|
|
if (!m_NTCP2StaticKeys)
|
|
{
|
|
if (!m_NTCP2Keys) NewNTCP2Keys ();
|
|
auto x = new i2p::crypto::X25519Keys (m_NTCP2Keys->staticPrivateKey, m_NTCP2Keys->staticPublicKey);
|
|
if (!m_NTCP2StaticKeys)
|
|
m_NTCP2StaticKeys.reset (x);
|
|
else
|
|
delete x;
|
|
}
|
|
return *m_NTCP2StaticKeys;
|
|
}
|
|
|
|
i2p::crypto::X25519Keys& RouterContext::GetSSU2StaticKeys ()
|
|
{
|
|
if (!m_SSU2StaticKeys)
|
|
{
|
|
if (!m_SSU2Keys) NewSSU2Keys ();
|
|
auto x = new i2p::crypto::X25519Keys (m_SSU2Keys->staticPrivateKey, m_SSU2Keys->staticPublicKey);
|
|
if (!m_SSU2StaticKeys)
|
|
m_SSU2StaticKeys.reset (x);
|
|
else
|
|
delete x;
|
|
}
|
|
return *m_SSU2StaticKeys;
|
|
}
|
|
}
|