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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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1009 lines
30 KiB
1009 lines
30 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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#include "Log.h" |
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#include "Crypto.h" |
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#include "RouterContext.h" |
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#include "I2NPProtocol.h" |
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#include "NetDb.hpp" |
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#include "Transports.h" |
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#include "Config.h" |
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#include "HTTP.h" |
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#include "util.h" |
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using namespace i2p::data; |
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namespace i2p |
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{ |
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namespace transport |
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{ |
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template<typename Keys> |
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EphemeralKeysSupplier<Keys>::EphemeralKeysSupplier (int size): |
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m_QueueSize (size), m_IsRunning (false), m_Thread (nullptr) |
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{ |
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} |
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template<typename Keys> |
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EphemeralKeysSupplier<Keys>::~EphemeralKeysSupplier () |
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{ |
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Stop (); |
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} |
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template<typename Keys> |
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void EphemeralKeysSupplier<Keys>::Start () |
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{ |
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m_IsRunning = true; |
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m_Thread = new std::thread (std::bind (&EphemeralKeysSupplier<Keys>::Run, this)); |
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} |
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template<typename Keys> |
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void EphemeralKeysSupplier<Keys>::Stop () |
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{ |
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{ |
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std::unique_lock<std::mutex> l(m_AcquiredMutex); |
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m_IsRunning = false; |
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m_Acquired.notify_one (); |
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} |
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if (m_Thread) |
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{ |
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m_Thread->join (); |
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delete m_Thread; |
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m_Thread = 0; |
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} |
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} |
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template<typename Keys> |
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void EphemeralKeysSupplier<Keys>::Run () |
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{ |
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i2p::util::SetThreadName("Ephemerals"); |
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while (m_IsRunning) |
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{ |
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int num, total = 0; |
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while ((num = m_QueueSize - (int)m_Queue.size ()) > 0 && total < 10) |
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{ |
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CreateEphemeralKeys (num); |
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total += num; |
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} |
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if (total >= 10) |
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{ |
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LogPrint (eLogWarning, "Transports: ", total, " ephemeral keys generated at the time"); |
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std::this_thread::sleep_for (std::chrono::seconds(1)); // take a break |
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} |
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else |
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{ |
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std::unique_lock<std::mutex> l(m_AcquiredMutex); |
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if (!m_IsRunning) break; |
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m_Acquired.wait (l); // wait for element gets acquired |
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} |
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} |
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} |
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template<typename Keys> |
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void EphemeralKeysSupplier<Keys>::CreateEphemeralKeys (int num) |
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{ |
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if (num > 0) |
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{ |
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for (int i = 0; i < num; i++) |
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{ |
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auto pair = std::make_shared<Keys> (); |
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pair->GenerateKeys (); |
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std::unique_lock<std::mutex> l(m_AcquiredMutex); |
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m_Queue.push (pair); |
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} |
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} |
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} |
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template<typename Keys> |
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std::shared_ptr<Keys> EphemeralKeysSupplier<Keys>::Acquire () |
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{ |
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{ |
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std::unique_lock<std::mutex> l(m_AcquiredMutex); |
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if (!m_Queue.empty ()) |
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{ |
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auto pair = m_Queue.front (); |
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m_Queue.pop (); |
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m_Acquired.notify_one (); |
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return pair; |
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} |
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} |
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// queue is empty, create new |
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auto pair = std::make_shared<Keys> (); |
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pair->GenerateKeys (); |
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return pair; |
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} |
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template<typename Keys> |
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void EphemeralKeysSupplier<Keys>::Return (std::shared_ptr<Keys> pair) |
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{ |
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if (pair) |
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{ |
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std::unique_lock<std::mutex>l(m_AcquiredMutex); |
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if ((int)m_Queue.size () < 2*m_QueueSize) |
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m_Queue.push (pair); |
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} |
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else |
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LogPrint(eLogError, "Transports: Return null DHKeys"); |
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} |
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Transports transports; |
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Transports::Transports (): |
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m_IsOnline (true), m_IsRunning (false), m_IsNAT (true), m_CheckReserved(true), m_Thread (nullptr), |
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m_Service (nullptr), m_Work (nullptr), m_PeerCleanupTimer (nullptr), m_PeerTestTimer (nullptr), |
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m_SSU2Server (nullptr), m_NTCP2Server (nullptr), |
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m_X25519KeysPairSupplier (15), // 15 pre-generated keys |
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m_TotalSentBytes(0), m_TotalReceivedBytes(0), m_TotalTransitTransmittedBytes (0), |
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m_InBandwidth (0), m_OutBandwidth (0), m_TransitBandwidth(0), |
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m_LastInBandwidthUpdateBytes (0), m_LastOutBandwidthUpdateBytes (0), |
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m_LastTransitBandwidthUpdateBytes (0), m_LastBandwidthUpdateTime (0) |
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{ |
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} |
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Transports::~Transports () |
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{ |
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Stop (); |
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if (m_Service) |
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{ |
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delete m_PeerCleanupTimer; m_PeerCleanupTimer = nullptr; |
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delete m_PeerTestTimer; m_PeerTestTimer = nullptr; |
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delete m_Work; m_Work = nullptr; |
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delete m_Service; m_Service = nullptr; |
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} |
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} |
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void Transports::Start (bool enableNTCP2, bool enableSSU2) |
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{ |
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if (!m_Service) |
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{ |
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m_Service = new boost::asio::io_service (); |
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m_Work = new boost::asio::io_service::work (*m_Service); |
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m_PeerCleanupTimer = new boost::asio::deadline_timer (*m_Service); |
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m_PeerTestTimer = new boost::asio::deadline_timer (*m_Service); |
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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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i2p::config::GetOption("nat", m_IsNAT); |
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m_X25519KeysPairSupplier.Start (); |
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m_IsRunning = true; |
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m_Thread = new std::thread (std::bind (&Transports::Run, this)); |
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std::string ntcp2proxy; i2p::config::GetOption("ntcp2.proxy", ntcp2proxy); |
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i2p::http::URL proxyurl; |
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// create NTCP2. TODO: move to acceptor |
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if (enableNTCP2 || i2p::context.SupportsMesh ()) |
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{ |
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if(!ntcp2proxy.empty() && enableNTCP2) |
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{ |
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if(proxyurl.parse(ntcp2proxy)) |
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{ |
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if(proxyurl.schema == "socks" || proxyurl.schema == "http") |
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{ |
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m_NTCP2Server = new NTCP2Server (); |
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NTCP2Server::ProxyType proxytype = NTCP2Server::eSocksProxy; |
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if (proxyurl.schema == "http") |
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proxytype = NTCP2Server::eHTTPProxy; |
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m_NTCP2Server->UseProxy(proxytype, proxyurl.host, proxyurl.port, proxyurl.user, proxyurl.pass); |
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i2p::context.SetStatus (eRouterStatusProxy); |
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if (ipv6) |
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i2p::context.SetStatusV6 (eRouterStatusProxy); |
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} |
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else |
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LogPrint(eLogError, "Transports: Unsupported NTCP2 proxy URL ", ntcp2proxy); |
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} |
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else |
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LogPrint(eLogError, "Transports: Invalid NTCP2 proxy URL ", ntcp2proxy); |
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} |
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else |
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m_NTCP2Server = new NTCP2Server (); |
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} |
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// create SSU2 server |
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if (enableSSU2) |
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{ |
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m_SSU2Server = new SSU2Server (); |
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std::string ssu2proxy; i2p::config::GetOption("ssu2.proxy", ssu2proxy); |
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if (!ssu2proxy.empty()) |
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{ |
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if (proxyurl.parse (ssu2proxy) && proxyurl.schema == "socks") |
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{ |
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if (m_SSU2Server->SetProxy (proxyurl.host, proxyurl.port)) |
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{ |
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i2p::context.SetStatus (eRouterStatusProxy); |
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if (ipv6) |
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i2p::context.SetStatusV6 (eRouterStatusProxy); |
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} |
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else |
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LogPrint(eLogError, "Transports: Can't set SSU2 proxy ", ssu2proxy); |
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} |
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else |
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LogPrint(eLogError, "Transports: Invalid SSU2 proxy URL ", ssu2proxy); |
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} |
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} |
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// bind to interfaces |
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if (ipv4) |
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{ |
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std::string address; i2p::config::GetOption("address4", address); |
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if (!address.empty ()) |
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{ |
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boost::system::error_code ec; |
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auto addr = boost::asio::ip::address::from_string (address, ec); |
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if (!ec) |
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{ |
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if (m_NTCP2Server) m_NTCP2Server->SetLocalAddress (addr); |
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if (m_SSU2Server) m_SSU2Server->SetLocalAddress (addr); |
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} |
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} |
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if (enableSSU2) |
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{ |
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uint16_t mtu; i2p::config::GetOption ("ssu2.mtu4", mtu); |
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if (mtu) |
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{ |
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if (mtu < (int)SSU2_MIN_PACKET_SIZE) mtu = SSU2_MIN_PACKET_SIZE; |
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if (mtu > (int)SSU2_MAX_PACKET_SIZE) mtu = SSU2_MAX_PACKET_SIZE; |
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i2p::context.SetMTU (mtu, true); |
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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 address; i2p::config::GetOption("address6", address); |
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if (!address.empty ()) |
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{ |
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boost::system::error_code ec; |
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auto addr = boost::asio::ip::address::from_string (address, ec); |
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if (!ec) |
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{ |
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if (m_NTCP2Server) m_NTCP2Server->SetLocalAddress (addr); |
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if (m_SSU2Server) m_SSU2Server->SetLocalAddress (addr); |
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} |
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} |
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if (enableSSU2) |
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{ |
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uint16_t mtu; i2p::config::GetOption ("ssu2.mtu6", mtu); |
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if (mtu) |
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{ |
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if (mtu < (int)SSU2_MIN_PACKET_SIZE) mtu = SSU2_MIN_PACKET_SIZE; |
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if (mtu > (int)SSU2_MAX_PACKET_SIZE) mtu = SSU2_MAX_PACKET_SIZE; |
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i2p::context.SetMTU (mtu, false); |
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} |
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} |
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} |
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bool ygg; i2p::config::GetOption("meshnets.yggdrasil", ygg); |
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if (ygg) |
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{ |
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std::string address; i2p::config::GetOption("meshnets.yggaddress", address); |
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if (!address.empty ()) |
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{ |
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boost::system::error_code ec; |
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auto addr = boost::asio::ip::address::from_string (address, ec); |
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if (!ec && m_NTCP2Server && i2p::util::net::IsYggdrasilAddress (addr)) |
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m_NTCP2Server->SetLocalAddress (addr); |
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} |
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} |
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// start servers |
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if (m_NTCP2Server) m_NTCP2Server->Start (); |
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if (m_SSU2Server) m_SSU2Server->Start (); |
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if (m_SSU2Server) DetectExternalIP (); |
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m_PeerCleanupTimer->expires_from_now (boost::posix_time::seconds(5*SESSION_CREATION_TIMEOUT)); |
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m_PeerCleanupTimer->async_wait (std::bind (&Transports::HandlePeerCleanupTimer, this, std::placeholders::_1)); |
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if (m_IsNAT) |
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{ |
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m_PeerTestTimer->expires_from_now (boost::posix_time::minutes(PEER_TEST_INTERVAL)); |
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m_PeerTestTimer->async_wait (std::bind (&Transports::HandlePeerTestTimer, this, std::placeholders::_1)); |
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} |
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} |
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void Transports::Stop () |
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{ |
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if (m_PeerCleanupTimer) m_PeerCleanupTimer->cancel (); |
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if (m_PeerTestTimer) m_PeerTestTimer->cancel (); |
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m_Peers.clear (); |
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if (m_SSU2Server) |
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{ |
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m_SSU2Server->Stop (); |
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delete m_SSU2Server; |
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m_SSU2Server = nullptr; |
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} |
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if (m_NTCP2Server) |
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{ |
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m_NTCP2Server->Stop (); |
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delete m_NTCP2Server; |
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m_NTCP2Server = nullptr; |
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} |
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m_X25519KeysPairSupplier.Stop (); |
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m_IsRunning = false; |
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if (m_Service) m_Service->stop (); |
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if (m_Thread) |
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{ |
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m_Thread->join (); |
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delete m_Thread; |
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m_Thread = nullptr; |
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} |
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} |
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void Transports::Run () |
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{ |
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i2p::util::SetThreadName("Transports"); |
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while (m_IsRunning && m_Service) |
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{ |
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try |
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{ |
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m_Service->run (); |
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} |
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catch (std::exception& ex) |
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{ |
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LogPrint (eLogError, "Transports: Runtime exception: ", ex.what ()); |
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} |
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} |
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} |
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void Transports::UpdateBandwidth () |
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{ |
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uint64_t ts = i2p::util::GetMillisecondsSinceEpoch (); |
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if (m_LastBandwidthUpdateTime > 0) |
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{ |
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auto delta = ts - m_LastBandwidthUpdateTime; |
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if (delta > 0) |
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{ |
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m_InBandwidth = (m_TotalReceivedBytes - m_LastInBandwidthUpdateBytes)*1000/delta; // per second |
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m_OutBandwidth = (m_TotalSentBytes - m_LastOutBandwidthUpdateBytes)*1000/delta; // per second |
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m_TransitBandwidth = (m_TotalTransitTransmittedBytes - m_LastTransitBandwidthUpdateBytes)*1000/delta; |
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} |
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} |
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m_LastBandwidthUpdateTime = ts; |
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m_LastInBandwidthUpdateBytes = m_TotalReceivedBytes; |
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m_LastOutBandwidthUpdateBytes = m_TotalSentBytes; |
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m_LastTransitBandwidthUpdateBytes = m_TotalTransitTransmittedBytes; |
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} |
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bool Transports::IsBandwidthExceeded () const |
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{ |
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auto limit = i2p::context.GetBandwidthLimit() * 1024; // convert to bytes |
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auto bw = std::max (m_InBandwidth, m_OutBandwidth); |
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return bw > limit; |
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} |
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bool Transports::IsTransitBandwidthExceeded () const |
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{ |
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auto limit = i2p::context.GetTransitBandwidthLimit() * 1024; // convert to bytes |
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return m_TransitBandwidth > limit; |
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} |
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void Transports::SendMessage (const i2p::data::IdentHash& ident, std::shared_ptr<i2p::I2NPMessage> msg) |
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{ |
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if (m_IsOnline) |
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SendMessages (ident, std::vector<std::shared_ptr<i2p::I2NPMessage> > {msg }); |
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} |
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void Transports::SendMessages (const i2p::data::IdentHash& ident, const std::vector<std::shared_ptr<i2p::I2NPMessage> >& msgs) |
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{ |
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m_Service->post (std::bind (&Transports::PostMessages, this, ident, msgs)); |
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} |
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void Transports::PostMessages (i2p::data::IdentHash ident, std::vector<std::shared_ptr<i2p::I2NPMessage> > msgs) |
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{ |
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if (ident == i2p::context.GetRouterInfo ().GetIdentHash ()) |
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{ |
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// we send it to ourself |
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for (auto& it: msgs) |
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m_LoopbackHandler.PutNextMessage (std::move (it)); |
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m_LoopbackHandler.Flush (); |
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return; |
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} |
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if(RoutesRestricted() && !IsRestrictedPeer(ident)) return; |
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auto it = m_Peers.find (ident); |
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if (it == m_Peers.end ()) |
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{ |
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bool connected = false; |
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try |
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{ |
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auto r = netdb.FindRouter (ident); |
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if (r && (r->IsUnreachable () || !r->IsReachableFrom (i2p::context.GetRouterInfo ()))) return; // router found but non-reachable |
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{ |
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auto ts = i2p::util::GetSecondsSinceEpoch (); |
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std::unique_lock<std::mutex> l(m_PeersMutex); |
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it = m_Peers.insert (std::pair<i2p::data::IdentHash, Peer>(ident, {r, ts})).first; |
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} |
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connected = ConnectToPeer (ident, it->second); |
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} |
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catch (std::exception& ex) |
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{ |
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LogPrint (eLogError, "Transports: PostMessages exception:", ex.what ()); |
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} |
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if (!connected) return; |
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} |
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if (!it->second.sessions.empty ()) |
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it->second.sessions.front ()->SendI2NPMessages (msgs); |
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else |
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{ |
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if (it->second.delayedMessages.size () < MAX_NUM_DELAYED_MESSAGES) |
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{ |
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for (auto& it1: msgs) |
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it->second.delayedMessages.push_back (it1); |
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} |
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else |
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{ |
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LogPrint (eLogWarning, "Transports: Delayed messages queue size to ", |
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ident.ToBase64 (), " exceeds ", MAX_NUM_DELAYED_MESSAGES); |
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std::unique_lock<std::mutex> l(m_PeersMutex); |
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m_Peers.erase (it); |
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} |
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} |
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} |
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bool Transports::ConnectToPeer (const i2p::data::IdentHash& ident, Peer& peer) |
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{ |
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if (!peer.router) // reconnect |
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peer.router = netdb.FindRouter (ident); // try to get new one from netdb |
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if (peer.router) // we have RI already |
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{ |
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if (peer.priority.empty ()) |
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SetPriority (peer); |
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while (peer.numAttempts < (int)peer.priority.size ()) |
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{ |
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auto tr = peer.priority[peer.numAttempts]; |
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peer.numAttempts++; |
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switch (tr) |
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{ |
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case i2p::data::RouterInfo::eNTCP2V4: |
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case i2p::data::RouterInfo::eNTCP2V6: |
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{ |
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if (!m_NTCP2Server) continue; |
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std::shared_ptr<const RouterInfo::Address> address = (tr == i2p::data::RouterInfo::eNTCP2V6) ? |
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peer.router->GetPublishedNTCP2V6Address () : peer.router->GetPublishedNTCP2V4Address (); |
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if (address && m_CheckReserved && i2p::util::net::IsInReservedRange(address->host)) |
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address = nullptr; |
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if (address) |
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{ |
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auto s = std::make_shared<NTCP2Session> (*m_NTCP2Server, peer.router, address); |
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if( m_NTCP2Server->UsingProxy()) |
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m_NTCP2Server->ConnectWithProxy(s); |
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else |
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m_NTCP2Server->Connect (s); |
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return true; |
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} |
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break; |
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} |
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case i2p::data::RouterInfo::eSSU2V4: |
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case i2p::data::RouterInfo::eSSU2V6: |
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{ |
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if (!m_SSU2Server) continue; |
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std::shared_ptr<const RouterInfo::Address> address = (tr == i2p::data::RouterInfo::eSSU2V6) ? |
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peer.router->GetSSU2V6Address () : peer.router->GetSSU2V4Address (); |
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if (address && m_CheckReserved && i2p::util::net::IsInReservedRange(address->host)) |
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address = nullptr; |
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if (address && address->IsReachableSSU ()) |
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{ |
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if (m_SSU2Server->CreateSession (peer.router, address)) |
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return true; |
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} |
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break; |
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} |
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case i2p::data::RouterInfo::eNTCP2V6Mesh: |
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{ |
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if (!m_NTCP2Server) continue; |
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auto address = peer.router->GetYggdrasilAddress (); |
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if (address) |
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{ |
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auto s = std::make_shared<NTCP2Session> (*m_NTCP2Server, peer.router, address); |
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m_NTCP2Server->Connect (s); |
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return true; |
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} |
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break; |
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} |
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default: |
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LogPrint (eLogError, "Transports: Unknown transport ", (int)tr); |
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} |
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} |
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|
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LogPrint (eLogInfo, "Transports: No compatible addresses available"); |
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i2p::data::netdb.SetUnreachable (ident, true); // we are here because all connection attempts failed |
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peer.Done (); |
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std::unique_lock<std::mutex> l(m_PeersMutex); |
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m_Peers.erase (ident); |
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return false; |
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} |
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else // otherwise request RI |
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{ |
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LogPrint (eLogInfo, "Transports: RouterInfo for ", ident.ToBase64 (), " not found, requested"); |
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i2p::data::netdb.RequestDestination (ident, std::bind ( |
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&Transports::RequestComplete, this, std::placeholders::_1, ident)); |
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} |
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return true; |
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} |
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|
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void Transports::SetPriority (Peer& peer) const |
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{ |
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static const std::vector<i2p::data::RouterInfo::SupportedTransports> |
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ntcp2Priority = |
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{ |
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i2p::data::RouterInfo::eNTCP2V6, |
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i2p::data::RouterInfo::eNTCP2V4, |
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i2p::data::RouterInfo::eSSU2V6, |
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i2p::data::RouterInfo::eSSU2V4, |
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i2p::data::RouterInfo::eNTCP2V6Mesh |
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}, |
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ssu2Priority = |
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{ |
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i2p::data::RouterInfo::eSSU2V6, |
|
i2p::data::RouterInfo::eSSU2V4, |
|
i2p::data::RouterInfo::eNTCP2V6, |
|
i2p::data::RouterInfo::eNTCP2V4, |
|
i2p::data::RouterInfo::eNTCP2V6Mesh |
|
}; |
|
if (!peer.router) return; |
|
auto compatibleTransports = context.GetRouterInfo ().GetCompatibleTransports (false) & |
|
peer.router->GetCompatibleTransports (true); |
|
peer.numAttempts = 0; |
|
peer.priority.clear (); |
|
bool ssu2 = rand () & 1; |
|
const auto& priority = ssu2 ? ssu2Priority : ntcp2Priority; |
|
for (auto transport: priority) |
|
if (transport & compatibleTransports) |
|
peer.priority.push_back (transport); |
|
} |
|
|
|
void Transports::RequestComplete (std::shared_ptr<const i2p::data::RouterInfo> r, const i2p::data::IdentHash& ident) |
|
{ |
|
m_Service->post (std::bind (&Transports::HandleRequestComplete, this, r, ident)); |
|
} |
|
|
|
void Transports::HandleRequestComplete (std::shared_ptr<const i2p::data::RouterInfo> r, i2p::data::IdentHash ident) |
|
{ |
|
auto it = m_Peers.find (ident); |
|
if (it != m_Peers.end ()) |
|
{ |
|
if (r) |
|
{ |
|
LogPrint (eLogDebug, "Transports: RouterInfo for ", ident.ToBase64 (), " found, trying to connect"); |
|
it->second.router = r; |
|
ConnectToPeer (ident, it->second); |
|
} |
|
else |
|
{ |
|
LogPrint (eLogWarning, "Transports: RouterInfo not found, failed to send messages"); |
|
std::unique_lock<std::mutex> l(m_PeersMutex); |
|
m_Peers.erase (it); |
|
} |
|
} |
|
} |
|
|
|
void Transports::DetectExternalIP () |
|
{ |
|
if (RoutesRestricted()) |
|
{ |
|
LogPrint(eLogInfo, "Transports: Restricted routes enabled, not detecting IP"); |
|
i2p::context.SetStatus (eRouterStatusOK); |
|
return; |
|
} |
|
if (m_SSU2Server) |
|
PeerTest (); |
|
else |
|
LogPrint (eLogWarning, "Transports: Can't detect external IP. SSU or SSU2 is not available"); |
|
} |
|
|
|
void Transports::PeerTest (bool ipv4, bool ipv6) |
|
{ |
|
if (RoutesRestricted() || !m_SSU2Server || m_SSU2Server->UsesProxy ()) return; |
|
if (ipv4 && i2p::context.SupportsV4 ()) |
|
{ |
|
LogPrint (eLogInfo, "Transports: Started peer test IPv4"); |
|
std::set<i2p::data::IdentHash> excluded; |
|
excluded.insert (i2p::context.GetIdentHash ()); // don't pick own router |
|
for (int i = 0; i < 5; i++) |
|
{ |
|
auto router = i2p::data::netdb.GetRandomSSU2PeerTestRouter (true, excluded); // v4 |
|
if (router) |
|
{ |
|
if (i2p::context.GetStatus () != eRouterStatusTesting) |
|
i2p::context.SetStatus (eRouterStatusTesting); |
|
m_SSU2Server->StartPeerTest (router, true); |
|
excluded.insert (router->GetIdentHash ()); |
|
} |
|
} |
|
if (excluded.size () <= 1) |
|
LogPrint (eLogWarning, "Transports: Can't find routers for peer test IPv4"); |
|
} |
|
if (ipv6 && i2p::context.SupportsV6 ()) |
|
{ |
|
LogPrint (eLogInfo, "Transports: Started peer test IPv6"); |
|
std::set<i2p::data::IdentHash> excluded; |
|
excluded.insert (i2p::context.GetIdentHash ()); // don't pick own router |
|
for (int i = 0; i < 5; i++) |
|
{ |
|
auto router = i2p::data::netdb.GetRandomSSU2PeerTestRouter (false, excluded); // v6 |
|
if (router) |
|
{ |
|
if (i2p::context.GetStatusV6 () != eRouterStatusTesting) |
|
i2p::context.SetStatusV6 (eRouterStatusTesting); |
|
m_SSU2Server->StartPeerTest (router, false); |
|
excluded.insert (router->GetIdentHash ()); |
|
} |
|
} |
|
if (excluded.size () <= 1) |
|
LogPrint (eLogWarning, "Transports: Can't find routers for peer test IPv6"); |
|
} |
|
} |
|
|
|
std::shared_ptr<i2p::crypto::X25519Keys> Transports::GetNextX25519KeysPair () |
|
{ |
|
return m_X25519KeysPairSupplier.Acquire (); |
|
} |
|
|
|
void Transports::ReuseX25519KeysPair (std::shared_ptr<i2p::crypto::X25519Keys> pair) |
|
{ |
|
m_X25519KeysPairSupplier.Return (pair); |
|
} |
|
|
|
void Transports::PeerConnected (std::shared_ptr<TransportSession> session) |
|
{ |
|
m_Service->post([session, this]() |
|
{ |
|
auto remoteIdentity = session->GetRemoteIdentity (); |
|
if (!remoteIdentity) return; |
|
auto ident = remoteIdentity->GetIdentHash (); |
|
auto it = m_Peers.find (ident); |
|
if (it != m_Peers.end ()) |
|
{ |
|
it->second.router = nullptr; // we don't need RouterInfo after successive connect |
|
bool sendDatabaseStore = true; |
|
if (it->second.delayedMessages.size () > 0) |
|
{ |
|
// check if first message is our DatabaseStore (publishing) |
|
auto firstMsg = it->second.delayedMessages[0]; |
|
if (firstMsg && firstMsg->GetTypeID () == eI2NPDatabaseStore && |
|
i2p::data::IdentHash(firstMsg->GetPayload () + DATABASE_STORE_KEY_OFFSET) == i2p::context.GetIdentHash ()) |
|
sendDatabaseStore = false; // we have it in the list already |
|
} |
|
if (sendDatabaseStore) |
|
session->SendLocalRouterInfo (); |
|
else |
|
session->SetTerminationTimeout (10); // most likely it's publishing, no follow-up messages expected, set timeout to 10 seconds |
|
it->second.sessions.push_back (session); |
|
session->SendI2NPMessages (it->second.delayedMessages); |
|
it->second.delayedMessages.clear (); |
|
} |
|
else // incoming connection |
|
{ |
|
if(RoutesRestricted() && ! IsRestrictedPeer(ident)) { |
|
// not trusted |
|
LogPrint(eLogWarning, "Transports: Closing untrusted inbound connection from ", ident.ToBase64()); |
|
session->Done(); |
|
return; |
|
} |
|
session->SendI2NPMessages ({ CreateDatabaseStoreMsg () }); // send DatabaseStore |
|
auto ts = i2p::util::GetSecondsSinceEpoch (); |
|
std::unique_lock<std::mutex> l(m_PeersMutex); |
|
m_Peers.insert (std::make_pair (ident, Peer{ nullptr, ts })); |
|
} |
|
}); |
|
} |
|
|
|
void Transports::PeerDisconnected (std::shared_ptr<TransportSession> session) |
|
{ |
|
m_Service->post([session, this]() |
|
{ |
|
auto remoteIdentity = session->GetRemoteIdentity (); |
|
if (!remoteIdentity) return; |
|
auto ident = remoteIdentity->GetIdentHash (); |
|
auto it = m_Peers.find (ident); |
|
if (it != m_Peers.end ()) |
|
{ |
|
auto before = it->second.sessions.size (); |
|
it->second.sessions.remove (session); |
|
if (it->second.sessions.empty ()) |
|
{ |
|
if (it->second.delayedMessages.size () > 0) |
|
{ |
|
if (before > 0) // we had an active session before |
|
it->second.numAttempts = 0; // start over |
|
ConnectToPeer (ident, it->second); |
|
} |
|
else |
|
{ |
|
std::unique_lock<std::mutex> l(m_PeersMutex); |
|
m_Peers.erase (it); |
|
} |
|
} |
|
} |
|
}); |
|
} |
|
|
|
bool Transports::IsConnected (const i2p::data::IdentHash& ident) const |
|
{ |
|
std::unique_lock<std::mutex> l(m_PeersMutex); |
|
auto it = m_Peers.find (ident); |
|
return it != m_Peers.end (); |
|
} |
|
|
|
void Transports::HandlePeerCleanupTimer (const boost::system::error_code& ecode) |
|
{ |
|
if (ecode != boost::asio::error::operation_aborted) |
|
{ |
|
auto ts = i2p::util::GetSecondsSinceEpoch (); |
|
for (auto it = m_Peers.begin (); it != m_Peers.end (); ) |
|
{ |
|
if (it->second.sessions.empty () && ts > it->second.creationTime + SESSION_CREATION_TIMEOUT) |
|
{ |
|
LogPrint (eLogWarning, "Transports: Session to peer ", it->first.ToBase64 (), " has not been created in ", SESSION_CREATION_TIMEOUT, " seconds"); |
|
auto profile = i2p::data::GetRouterProfile(it->first); |
|
if (profile) |
|
{ |
|
profile->TunnelNonReplied(); |
|
} |
|
std::unique_lock<std::mutex> l(m_PeersMutex); |
|
it = m_Peers.erase (it); |
|
} |
|
else |
|
{ |
|
if (ts > it->second.nextRouterInfoUpdateTime) |
|
{ |
|
auto session = it->second.sessions.front (); |
|
if (session) |
|
session->SendLocalRouterInfo (true); |
|
it->second.nextRouterInfoUpdateTime = ts + PEER_ROUTER_INFO_UPDATE_INTERVAL + |
|
rand () % PEER_ROUTER_INFO_UPDATE_INTERVAL_VARIANCE; |
|
} |
|
++it; |
|
} |
|
} |
|
UpdateBandwidth (); // TODO: use separate timer(s) for it |
|
bool ipv4Testing = i2p::context.GetStatus () == eRouterStatusTesting; |
|
bool ipv6Testing = i2p::context.GetStatusV6 () == eRouterStatusTesting; |
|
// if still testing, repeat peer test |
|
if (ipv4Testing || ipv6Testing) |
|
PeerTest (ipv4Testing, ipv6Testing); |
|
m_PeerCleanupTimer->expires_from_now (boost::posix_time::seconds(3*SESSION_CREATION_TIMEOUT)); |
|
m_PeerCleanupTimer->async_wait (std::bind (&Transports::HandlePeerCleanupTimer, this, std::placeholders::_1)); |
|
} |
|
} |
|
|
|
void Transports::HandlePeerTestTimer (const boost::system::error_code& ecode) |
|
{ |
|
if (ecode != boost::asio::error::operation_aborted) |
|
{ |
|
PeerTest (); |
|
m_PeerTestTimer->expires_from_now (boost::posix_time::minutes(PEER_TEST_INTERVAL)); |
|
m_PeerTestTimer->async_wait (std::bind (&Transports::HandlePeerTestTimer, this, std::placeholders::_1)); |
|
} |
|
} |
|
|
|
std::shared_ptr<const i2p::data::RouterInfo> Transports::GetRandomPeer () const |
|
{ |
|
if (m_Peers.empty ()) return nullptr; |
|
i2p::data::IdentHash ident; |
|
{ |
|
std::unique_lock<std::mutex> l(m_PeersMutex); |
|
auto it = m_Peers.begin (); |
|
std::advance (it, rand () % m_Peers.size ()); |
|
if (it == m_Peers.end () || it->second.router) return nullptr; // not connected |
|
ident = it->first; |
|
} |
|
return i2p::data::netdb.FindRouter (ident); |
|
} |
|
|
|
void Transports::RestrictRoutesToFamilies(const std::set<std::string>& families) |
|
{ |
|
std::lock_guard<std::mutex> lock(m_FamilyMutex); |
|
m_TrustedFamilies.clear(); |
|
for (auto fam : families) |
|
{ |
|
boost::to_lower (fam); |
|
auto id = i2p::data::netdb.GetFamilies ().GetFamilyID (fam); |
|
if (id) |
|
m_TrustedFamilies.push_back (id); |
|
} |
|
} |
|
|
|
void Transports::RestrictRoutesToRouters(std::set<i2p::data::IdentHash> routers) |
|
{ |
|
std::unique_lock<std::mutex> lock(m_TrustedRoutersMutex); |
|
m_TrustedRouters.clear(); |
|
for (const auto & ri : routers ) |
|
m_TrustedRouters.push_back(ri); |
|
} |
|
|
|
bool Transports::RoutesRestricted() const { |
|
std::unique_lock<std::mutex> famlock(m_FamilyMutex); |
|
std::unique_lock<std::mutex> routerslock(m_TrustedRoutersMutex); |
|
return m_TrustedFamilies.size() > 0 || m_TrustedRouters.size() > 0; |
|
} |
|
|
|
/** XXX: if routes are not restricted this dies */ |
|
std::shared_ptr<const i2p::data::RouterInfo> Transports::GetRestrictedPeer() const |
|
{ |
|
{ |
|
std::lock_guard<std::mutex> l(m_FamilyMutex); |
|
i2p::data::FamilyID fam = 0; |
|
auto sz = m_TrustedFamilies.size(); |
|
if(sz > 1) |
|
{ |
|
auto it = m_TrustedFamilies.begin (); |
|
std::advance(it, rand() % sz); |
|
fam = *it; |
|
} |
|
else if (sz == 1) |
|
{ |
|
fam = m_TrustedFamilies[0]; |
|
} |
|
if (fam) |
|
return i2p::data::netdb.GetRandomRouterInFamily(fam); |
|
} |
|
{ |
|
std::unique_lock<std::mutex> l(m_TrustedRoutersMutex); |
|
auto sz = m_TrustedRouters.size(); |
|
if (sz) |
|
{ |
|
if(sz == 1) |
|
return i2p::data::netdb.FindRouter(m_TrustedRouters[0]); |
|
auto it = m_TrustedRouters.begin(); |
|
std::advance(it, rand() % sz); |
|
return i2p::data::netdb.FindRouter(*it); |
|
} |
|
} |
|
return nullptr; |
|
} |
|
|
|
bool Transports::IsRestrictedPeer(const i2p::data::IdentHash & ih) const |
|
{ |
|
{ |
|
std::unique_lock<std::mutex> l(m_TrustedRoutersMutex); |
|
for (const auto & r : m_TrustedRouters ) |
|
if ( r == ih ) return true; |
|
} |
|
{ |
|
std::unique_lock<std::mutex> l(m_FamilyMutex); |
|
auto ri = i2p::data::netdb.FindRouter(ih); |
|
for (const auto & fam : m_TrustedFamilies) |
|
if(ri->IsFamily(fam)) return true; |
|
} |
|
return false; |
|
} |
|
|
|
void Transports::SetOnline (bool online) |
|
{ |
|
if (m_IsOnline != online) |
|
{ |
|
m_IsOnline = online; |
|
if (online) |
|
PeerTest (); |
|
else |
|
i2p::context.SetError (eRouterErrorOffline); |
|
} |
|
} |
|
|
|
void InitAddressFromIface () |
|
{ |
|
bool ipv6; i2p::config::GetOption("ipv6", ipv6); |
|
bool ipv4; i2p::config::GetOption("ipv4", ipv4); |
|
|
|
// ifname -> address |
|
std::string ifname; i2p::config::GetOption("ifname", ifname); |
|
if (ipv4 && i2p::config::IsDefault ("address4")) |
|
{ |
|
std::string ifname4; i2p::config::GetOption("ifname4", ifname4); |
|
if (!ifname4.empty ()) |
|
i2p::config::SetOption ("address4", i2p::util::net::GetInterfaceAddress(ifname4, false).to_string ()); // v4 |
|
else if (!ifname.empty ()) |
|
i2p::config::SetOption ("address4", i2p::util::net::GetInterfaceAddress(ifname, false).to_string ()); // v4 |
|
} |
|
if (ipv6 && i2p::config::IsDefault ("address6")) |
|
{ |
|
std::string ifname6; i2p::config::GetOption("ifname6", ifname6); |
|
if (!ifname6.empty ()) |
|
i2p::config::SetOption ("address6", i2p::util::net::GetInterfaceAddress(ifname6, true).to_string ()); // v6 |
|
else if (!ifname.empty ()) |
|
i2p::config::SetOption ("address6", i2p::util::net::GetInterfaceAddress(ifname, true).to_string ()); // v6 |
|
} |
|
} |
|
|
|
void InitTransports () |
|
{ |
|
bool ipv6; i2p::config::GetOption("ipv6", ipv6); |
|
bool ipv4; i2p::config::GetOption("ipv4", ipv4); |
|
bool ygg; i2p::config::GetOption("meshnets.yggdrasil", ygg); |
|
uint16_t port; i2p::config::GetOption("port", port); |
|
|
|
boost::asio::ip::address_v6 yggaddr; |
|
if (ygg) |
|
{ |
|
std::string yggaddress; i2p::config::GetOption ("meshnets.yggaddress", yggaddress); |
|
if (!yggaddress.empty ()) |
|
{ |
|
yggaddr = boost::asio::ip::address_v6::from_string (yggaddress); |
|
if (yggaddr.is_unspecified () || !i2p::util::net::IsYggdrasilAddress (yggaddr) || |
|
!i2p::util::net::IsLocalAddress (yggaddr)) |
|
{ |
|
LogPrint(eLogWarning, "Transports: Can't find Yggdrasil address ", yggaddress); |
|
ygg = false; |
|
} |
|
} |
|
else |
|
{ |
|
yggaddr = i2p::util::net::GetYggdrasilAddress (); |
|
if (yggaddr.is_unspecified ()) |
|
{ |
|
LogPrint(eLogWarning, "Transports: Yggdrasil is not running. Disabled"); |
|
ygg = false; |
|
} |
|
} |
|
} |
|
|
|
if (!i2p::config::IsDefault("port")) |
|
{ |
|
LogPrint(eLogInfo, "Transports: Accepting incoming connections at port ", port); |
|
i2p::context.UpdatePort (port); |
|
} |
|
i2p::context.SetSupportsV6 (ipv6); |
|
i2p::context.SetSupportsV4 (ipv4); |
|
i2p::context.SetSupportsMesh (ygg, yggaddr); |
|
|
|
bool ntcp2; i2p::config::GetOption("ntcp2.enabled", ntcp2); |
|
if (ntcp2) |
|
{ |
|
bool published; i2p::config::GetOption("ntcp2.published", published); |
|
if (published) |
|
{ |
|
std::string ntcp2proxy; i2p::config::GetOption("ntcp2.proxy", ntcp2proxy); |
|
if (!ntcp2proxy.empty ()) published = false; |
|
} |
|
if (published) |
|
{ |
|
uint16_t ntcp2port; i2p::config::GetOption("ntcp2.port", ntcp2port); |
|
if (!ntcp2port) ntcp2port = port; // use standard port |
|
i2p::context.PublishNTCP2Address (ntcp2port, true, ipv4, ipv6, false); // publish |
|
if (ipv6) |
|
{ |
|
std::string ipv6Addr; i2p::config::GetOption("ntcp2.addressv6", ipv6Addr); |
|
auto addr = boost::asio::ip::address_v6::from_string (ipv6Addr); |
|
if (!addr.is_unspecified () && addr != boost::asio::ip::address_v6::any ()) |
|
i2p::context.UpdateNTCP2V6Address (addr); // set ipv6 address if configured |
|
} |
|
} |
|
else |
|
i2p::context.PublishNTCP2Address (port, false, ipv4, ipv6, false); // unpublish |
|
} |
|
if (ygg) |
|
{ |
|
i2p::context.PublishNTCP2Address (port, true, false, false, true); |
|
i2p::context.UpdateNTCP2V6Address (yggaddr); |
|
if (!ipv4 && !ipv6) |
|
i2p::context.SetStatus (eRouterStatusMesh); |
|
} |
|
bool ssu2; i2p::config::GetOption("ssu2.enabled", ssu2); |
|
if (ssu2 && i2p::config::IsDefault ("ssu2.enabled") && !ipv4 && !ipv6) |
|
ssu2 = false; // don't enable ssu2 for yggdrasil only router |
|
if (ssu2) |
|
{ |
|
uint16_t ssu2port; i2p::config::GetOption("ssu2.port", ssu2port); |
|
if (!ssu2port && port) ssu2port = port; |
|
bool published; i2p::config::GetOption("ssu2.published", published); |
|
if (published) |
|
i2p::context.PublishSSU2Address (ssu2port, true, ipv4, ipv6); // publish |
|
else |
|
i2p::context.PublishSSU2Address (ssu2port, false, ipv4, ipv6); // unpublish |
|
} |
|
|
|
} |
|
} |
|
}
|
|
|