#include #include #include #include #include "CryptoConst.h" #include "RouterContext.h" #include "Timestamp.h" #include "I2NPProtocol.h" #include "NetDb.h" #include "util.h" #include "version.h" namespace i2p { RouterContext context; RouterContext::RouterContext (): m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false), m_StartupTime (0), m_Status (eRouterStatusOK ) { } void RouterContext::Init () { m_StartupTime = i2p::util::GetSecondsSinceEpoch (); if (!Load ()) CreateNewRouter (); UpdateRouterInfo (); } void RouterContext::CreateNewRouter () { m_Keys = i2p::data::CreateRandomKeys (); SaveKeys (); NewRouterInfo (); } void RouterContext::NewRouterInfo () { i2p::data::RouterInfo routerInfo; routerInfo.SetRouterIdentity (GetIdentity ()); int port = i2p::util::config::GetArg("-port", 0); if (!port) port = m_Rnd.GenerateWord32 (9111, 30777); // I2P network ports range routerInfo.AddSSUAddress (i2p::util::config::GetCharArg("-host", "127.0.0.1"), port, routerInfo.GetIdentHash ()); routerInfo.AddNTCPAddress (i2p::util::config::GetCharArg("-host", "127.0.0.1"), port); routerInfo.SetCaps (i2p::data::RouterInfo::eReachable | i2p::data::RouterInfo::eSSUTesting | i2p::data::RouterInfo::eSSUIntroducer); // LR, BC routerInfo.SetProperty ("coreVersion", I2P_VERSION); routerInfo.SetProperty ("netId", "2"); routerInfo.SetProperty ("router.version", I2P_VERSION); routerInfo.SetProperty ("stat_uptime", "90m"); routerInfo.CreateBuffer (m_Keys); m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ()); } void RouterContext::UpdateRouterInfo () { if (m_IsFloodfill) { // update routers and leasesets m_RouterInfo.SetProperty (ROUTER_INFO_PROPERTY_LEASESETS, boost::lexical_cast(i2p::data::netdb.GetNumLeaseSets ())); m_RouterInfo.SetProperty (ROUTER_INFO_PROPERTY_ROUTERS, boost::lexical_cast(i2p::data::netdb.GetNumRouters ())); } m_RouterInfo.CreateBuffer (m_Keys); m_RouterInfo.SaveToFile (i2p::util::filesystem::GetFullPath (ROUTER_INFO)); m_LastUpdateTime = i2p::util::GetSecondsSinceEpoch (); } 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& routerInfo, uint32_t tag) { bool ret = false; auto address = routerInfo.GetSSUAddress (); if (address) { ret = m_RouterInfo.AddIntroducer (address, tag); 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 (ROUTER_INFO_PROPERTY_LEASESETS); m_RouterInfo.DeleteProperty (ROUTER_INFO_PROPERTY_ROUTERS); } UpdateRouterInfo (); } 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 (size_t i = 0; i < addresses.size (); i++) { if (addresses[i].transportStyle == i2p::data::RouterInfo::eTransportNTCP) { addresses.erase (addresses.begin () + i); 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 (size_t i = 0; i < addresses.size (); i++) { if (addresses[i].transportStyle == i2p::data::RouterInfo::eTransportSSU) { // insert NTCP address with host/port form SSU m_RouterInfo.AddNTCPAddress (addresses[i].host.to_string ().c_str (), addresses[i].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::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 ("Our v6 MTU=", mtu); if (mtu > 1472) mtu = 1472; } m_RouterInfo.AddSSUAddress (host.to_string ().c_str (), port, GetIdentHash (), mtu ? mtu : 1472); // TODO updated = true; } if (updated) UpdateRouterInfo (); } bool RouterContext::Load () { std::ifstream fk (i2p::util::filesystem::GetFullPath (ROUTER_KEYS).c_str (), std::ifstream::binary | std::ofstream::in); if (!fk.is_open ()) return false; i2p::data::Keys keys; fk.read ((char *)&keys, sizeof (keys)); m_Keys = keys; i2p::data::RouterInfo routerInfo(i2p::util::filesystem::GetFullPath (ROUTER_INFO)); // TODO m_RouterInfo.Update (routerInfo.GetBuffer (), routerInfo.GetBufferLen ()); m_RouterInfo.SetProperty ("coreVersion", I2P_VERSION); m_RouterInfo.SetProperty ("router.version", I2P_VERSION); if (IsUnreachable ()) SetReachable (); // we assume reachable until we discover firewall through peer tests return true; } void RouterContext::SaveKeys () { std::ofstream fk (i2p::util::filesystem::GetFullPath (ROUTER_KEYS).c_str (), std::ofstream::binary | std::ofstream::out); i2p::data::Keys keys; memcpy (keys.privateKey, m_Keys.GetPrivateKey (), sizeof (keys.privateKey)); memcpy (keys.signingPrivateKey, m_Keys.GetSigningPrivateKey (), sizeof (keys.signingPrivateKey)); auto& ident = GetIdentity ().GetStandardIdentity (); memcpy (keys.publicKey, ident.publicKey, sizeof (keys.publicKey)); memcpy (keys.signingKey, ident.signingKey, sizeof (keys.signingKey)); fk.write ((char *)&keys, sizeof (keys)); } void RouterContext::HandleI2NPMessage (const uint8_t * buf, size_t len, std::shared_ptr from) { i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf), from)); } uint32_t RouterContext::GetUptime () const { return i2p::util::GetSecondsSinceEpoch () - m_StartupTime; } }