#include #include #include "Config.h" #include "Crypto.h" #include "Timestamp.h" #include "I2NPProtocol.h" #include "NetDb.h" #include "FS.h" #include "util.h" #include "version.h" #include "Log.h" #include "Family.h" #include "RouterContext.h" namespace i2p { RouterContext context; RouterContext::RouterContext (): m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false), m_StartupTime (0), m_Status (eRouterStatusOK), m_Error (eRouterErrorNone) { } void RouterContext::Init () { srand (i2p::util::GetMillisecondsSinceEpoch () % 1000); m_StartupTime = i2p::util::GetSecondsSinceEpoch (); if (!Load ()) CreateNewRouter (); UpdateRouterInfo (); } void RouterContext::CreateNewRouter () { #if defined(__x86_64__) || defined(__i386__) || defined(_MSC_VER) m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519); #else m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_DSA_SHA1); #endif SaveKeys (); NewRouterInfo (); } void RouterContext::NewRouterInfo () { i2p::data::RouterInfo routerInfo; routerInfo.SetRouterIdentity (GetIdentity ()); uint16_t port; i2p::config::GetOption("port", port); if (!port) port = rand () % (30777 - 9111) + 9111; // I2P network ports range bool ipv4; i2p::config::GetOption("ipv4", ipv4); bool ipv6; i2p::config::GetOption("ipv6", ipv6); bool nat; i2p::config::GetOption("nat", nat); std::string ifname; i2p::config::GetOption("ifname", ifname); if (ipv4) { std::string host = "127.0.0.1"; if (!i2p::config::IsDefault("host")) i2p::config::GetOption("host", host); else if (!nat && !ifname.empty()) /* bind to interface, we have no NAT so set external address too */ host = i2p::util::net::GetInterfaceAddress(ifname, false).to_string(); // v4 routerInfo.AddSSUAddress (host.c_str(), port, routerInfo.GetIdentHash ()); routerInfo.AddNTCPAddress (host.c_str(), port); } if (ipv6) { std::string host = "::"; if (!i2p::config::IsDefault("host") && !ipv4) // override if v6 only i2p::config::GetOption("host", host); else if (!ifname.empty()) host = i2p::util::net::GetInterfaceAddress(ifname, true).to_string(); // v6 routerInfo.AddSSUAddress (host.c_str(), port, routerInfo.GetIdentHash ()); routerInfo.AddNTCPAddress (host.c_str(), port); } routerInfo.SetCaps (i2p::data::RouterInfo::eReachable | i2p::data::RouterInfo::eSSUTesting | i2p::data::RouterInfo::eSSUIntroducer); // LR, BC routerInfo.SetProperty ("netId", std::to_string (I2PD_NET_ID)); routerInfo.SetProperty ("router.version", I2P_VERSION); routerInfo.CreateBuffer (m_Keys); m_RouterInfo.SetRouterIdentity (GetIdentity ()); m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ()); } void RouterContext::UpdateRouterInfo () { m_RouterInfo.CreateBuffer (m_Keys); m_RouterInfo.SaveToFile (i2p::fs::DataDirPath (ROUTER_INFO)); m_LastUpdateTime = i2p::util::GetSecondsSinceEpoch (); } void RouterContext::SetStatus (RouterStatus status) { if (status != m_Status) { m_Status = status; m_Error = eRouterErrorNone; switch (m_Status) { case eRouterStatusOK: SetReachable (); break; case eRouterStatusFirewalled: SetUnreachable (); break; default: ; } } } void RouterContext::UpdatePort (int port) { bool updated = false; for (auto& address : m_RouterInfo.GetAddresses ()) { if (address->port != port) { address->port = port; updated = true; } } if (updated) UpdateRouterInfo (); } void RouterContext::UpdateAddress (const boost::asio::ip::address& host) { bool updated = false; for (auto& address : m_RouterInfo.GetAddresses ()) { if (address->host != host && address->IsCompatible (host)) { address->host = host; updated = true; } } auto ts = i2p::util::GetSecondsSinceEpoch (); if (updated || ts > m_LastUpdateTime + ROUTER_INFO_UPDATE_INTERVAL) UpdateRouterInfo (); } bool RouterContext::AddIntroducer (const i2p::data::RouterInfo::Introducer& introducer) { bool ret = m_RouterInfo.AddIntroducer (introducer); if (ret) UpdateRouterInfo (); return ret; } void RouterContext::RemoveIntroducer (const boost::asio::ip::udp::endpoint& e) { if (m_RouterInfo.RemoveIntroducer (e)) UpdateRouterInfo (); } void RouterContext::SetFloodfill (bool floodfill) { m_IsFloodfill = floodfill; if (floodfill) m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () | i2p::data::RouterInfo::eFloodfill); else { m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () & ~i2p::data::RouterInfo::eFloodfill); // we don't publish number of routers and leaseset for non-floodfill m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS); m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS); } UpdateRouterInfo (); } std::string RouterContext::GetFamily () const { return m_RouterInfo.GetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY); } void RouterContext::SetFamily (const std::string& family) { std::string signature; if (family.length () > 0) signature = i2p::data::CreateFamilySignature (family, GetIdentHash ()); if (signature.length () > 0) { m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY, family); m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG, signature); } else { m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY); m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG); } } void RouterContext::SetBandwidth (char L) { uint16_t limit = 0; enum { low, high, extra } 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 = 9999; type = extra; break; 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 high : caps |= i2p::data::RouterInfo::eHighBandwidth; break; case extra : caps |= i2p::data::RouterInfo::eExtraBandwidth; break; } m_RouterInfo.SetCaps (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'); } } bool RouterContext::IsUnreachable () const { return m_RouterInfo.GetCaps () & i2p::data::RouterInfo::eUnreachable; } void RouterContext::SetUnreachable () { // set caps m_RouterInfo.SetCaps (i2p::data::RouterInfo::eUnreachable | i2p::data::RouterInfo::eSSUTesting); // LU, B // remove NTCP address auto& addresses = m_RouterInfo.GetAddresses (); for (auto it = addresses.begin (); it != addresses.end (); ++it) { if ((*it)->transportStyle == i2p::data::RouterInfo::eTransportNTCP && (*it)->host.is_v4 ()) { addresses.erase (it); break; } } // delete previous introducers for (auto& addr : addresses) addr->introducers.clear (); // update UpdateRouterInfo (); } void RouterContext::SetReachable () { // update caps uint8_t caps = m_RouterInfo.GetCaps (); caps &= ~i2p::data::RouterInfo::eUnreachable; caps |= i2p::data::RouterInfo::eReachable; caps |= i2p::data::RouterInfo::eSSUIntroducer; if (m_IsFloodfill) caps |= i2p::data::RouterInfo::eFloodfill; m_RouterInfo.SetCaps (caps); // insert NTCP back auto& addresses = m_RouterInfo.GetAddresses (); for (const auto& addr : addresses) { if (addr->transportStyle == i2p::data::RouterInfo::eTransportSSU && addr->host.is_v4 ()) { // insert NTCP address with host/port from SSU m_RouterInfo.AddNTCPAddress (addr->host.to_string ().c_str (), addr->port); break; } } // delete previous introducers for (auto& addr : addresses) addr->introducers.clear (); // update UpdateRouterInfo (); } void RouterContext::SetSupportsV6 (bool supportsV6) { if (supportsV6) m_RouterInfo.EnableV6 (); else m_RouterInfo.DisableV6 (); UpdateRouterInfo (); } void RouterContext::SetSupportsV4 (bool supportsV4) { if (supportsV4) m_RouterInfo.EnableV4 (); else m_RouterInfo.DisableV4 (); UpdateRouterInfo (); } void RouterContext::UpdateNTCPV6Address (const boost::asio::ip::address& host) { bool updated = false, found = false; int port = 0; auto& addresses = m_RouterInfo.GetAddresses (); for (auto& addr: addresses) { if (addr->host.is_v6 () && addr->transportStyle == i2p::data::RouterInfo::eTransportNTCP) { if (addr->host != host) { addr->host = host; updated = true; } found = true; } else port = addr->port; } if (!found) { // create new address m_RouterInfo.AddNTCPAddress (host.to_string ().c_str (), port); auto mtu = i2p::util::net::GetMTU (host); if (mtu) { LogPrint (eLogDebug, "Router: Our v6 MTU=", mtu); if (mtu > 1472) { // TODO: magic constant mtu = 1472; LogPrint(eLogWarning, "Router: MTU dropped to upper limit of 1472 bytes"); } } m_RouterInfo.AddSSUAddress (host.to_string ().c_str (), port, GetIdentHash (), mtu ? mtu : 1472); // TODO updated = true; } if (updated) UpdateRouterInfo (); } void RouterContext::UpdateStats () { if (m_IsFloodfill) { // update routers and leasesets m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS, boost::lexical_cast(i2p::data::netdb.GetNumLeaseSets ())); m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS, boost::lexical_cast(i2p::data::netdb.GetNumRouters ())); 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; } m_RouterInfo.SetRouterIdentity (GetIdentity ()); i2p::data::RouterInfo routerInfo(i2p::fs::DataDirPath (ROUTER_INFO)); if (!routerInfo.IsUnreachable ()) // router.info looks good { m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ()); m_RouterInfo.SetProperty ("coreVersion", I2P_VERSION); m_RouterInfo.SetProperty ("router.version", I2P_VERSION); // Migration to 0.9.24. TODO: remove later m_RouterInfo.DeleteProperty ("coreVersion"); m_RouterInfo.DeleteProperty ("stat_uptime"); } else { LogPrint (eLogError, ROUTER_INFO, " is malformed. Creating new"); NewRouterInfo (); } if (IsUnreachable ()) SetReachable (); // we assume reachable until we discover firewall through peer tests 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 RouterContext::GetTunnelPool () const { return i2p::tunnel::tunnels.GetExploratoryPool (); } void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t /*len*/, std::shared_ptr from) { i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf), from)); } void RouterContext::ProcessGarlicMessage (std::shared_ptr msg) { std::unique_lock l(m_GarlicMutex); i2p::garlic::GarlicDestination::ProcessGarlicMessage (msg); } void RouterContext::ProcessDeliveryStatusMessage (std::shared_ptr msg) { std::unique_lock l(m_GarlicMutex); i2p::garlic::GarlicDestination::ProcessDeliveryStatusMessage (msg); } void RouterContext::CleanupDestination () { std::unique_lock l(m_GarlicMutex); i2p::garlic::GarlicDestination::CleanupExpiredTags (); } uint32_t RouterContext::GetUptime () const { return i2p::util::GetSecondsSinceEpoch () - m_StartupTime; } }