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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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369 lines
10 KiB
369 lines
10 KiB
#include <algorithm> |
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#include <boost/lexical_cast.hpp> |
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#include <cryptopp/dh.h> |
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#include "Log.h" |
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#include "util.h" |
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#include "NetDb.h" |
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#include "Destination.h" |
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namespace i2p |
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{ |
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namespace client |
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{ |
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ClientDestination::ClientDestination (const i2p::data::PrivateKeys& keys, bool isPublic, |
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const std::map<std::string, std::string> * params): |
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m_IsRunning (false), m_Thread (nullptr), m_Service (nullptr), m_Work (nullptr), |
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m_Keys (keys), m_LeaseSet (nullptr), m_IsPublic (isPublic), m_PublishReplyToken (0), |
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m_DatagramDestination (nullptr), m_PublishConfirmationTimer (nullptr) |
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{ |
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CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg); |
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dh.GenerateKeyPair(i2p::context.GetRandomNumberGenerator (), m_EncryptionPrivateKey, m_EncryptionPublicKey); |
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int inboundTunnelLen = DEFAULT_INBOUND_TUNNEL_LENGTH; |
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int outboundTunnelLen = DEFAULT_OUTBOUND_TUNNEL_LENGTH; |
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if (params) |
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{ |
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auto it = params->find (I2CP_PARAM_INBOUND_TUNNEL_LENGTH); |
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if (it != params->end ()) |
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{ |
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int len = boost::lexical_cast<int>(it->second); |
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if (len > 0) |
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{ |
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inboundTunnelLen = len; |
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LogPrint (eLogInfo, "Inbound tunnel length set to ", len); |
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} |
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} |
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it = params->find (I2CP_PARAM_OUTBOUND_TUNNEL_LENGTH); |
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if (it != params->end ()) |
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{ |
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int len = boost::lexical_cast<int>(it->second); |
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if (len > 0) |
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{ |
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outboundTunnelLen = len; |
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LogPrint (eLogInfo, "Outbound tunnel length set to ", len); |
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} |
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} |
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} |
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m_Pool = i2p::tunnel::tunnels.CreateTunnelPool (*this, inboundTunnelLen, outboundTunnelLen); |
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if (m_IsPublic) |
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LogPrint (eLogInfo, "Local address ", GetIdentHash ().ToBase32 (), ".b32.i2p created"); |
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m_StreamingDestination = new i2p::stream::StreamingDestination (*this); // TODO: |
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} |
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ClientDestination::~ClientDestination () |
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{ |
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Stop (); |
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for (auto it: m_RemoteLeaseSets) |
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delete it.second; |
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if (m_Pool) |
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i2p::tunnel::tunnels.DeleteTunnelPool (m_Pool); |
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delete m_LeaseSet; |
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delete m_Work; |
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delete m_PublishConfirmationTimer; |
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delete m_Service; |
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delete m_StreamingDestination; |
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delete m_DatagramDestination; |
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} |
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void ClientDestination::Run () |
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{ |
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while (m_IsRunning) |
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{ |
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try |
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{ |
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if (m_Service) |
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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 ("Destination: ", ex.what ()); |
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} |
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} |
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} |
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void ClientDestination::Start () |
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{ |
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m_Service = new boost::asio::io_service; |
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m_PublishConfirmationTimer = new boost::asio::deadline_timer (*m_Service); |
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m_Work = new boost::asio::io_service::work (*m_Service); |
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m_Pool->SetActive (true); |
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m_IsRunning = true; |
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m_Thread = new std::thread (std::bind (&ClientDestination::Run, this)); |
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m_StreamingDestination->Start (); |
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} |
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void ClientDestination::Stop () |
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{ |
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m_StreamingDestination->Stop (); |
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if (m_DatagramDestination) |
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{ |
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auto d = m_DatagramDestination; |
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m_DatagramDestination = nullptr; |
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delete d; |
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} |
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if (m_Pool) |
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i2p::tunnel::tunnels.StopTunnelPool (m_Pool); |
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m_IsRunning = false; |
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if (m_Service) |
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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 = 0; |
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} |
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delete m_PublishConfirmationTimer; m_PublishConfirmationTimer = 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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const i2p::data::LeaseSet * ClientDestination::FindLeaseSet (const i2p::data::IdentHash& ident) |
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{ |
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auto it = m_RemoteLeaseSets.find (ident); |
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if (it != m_RemoteLeaseSets.end ()) |
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{ |
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if (it->second->HasNonExpiredLeases ()) |
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return it->second; |
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else |
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{ |
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LogPrint ("All leases of remote LeaseSet expired. Request it"); |
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i2p::data::netdb.RequestDestination (ident, true, m_Pool); |
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} |
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} |
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else |
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{ |
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auto ls = i2p::data::netdb.FindLeaseSet (ident); |
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if (ls) |
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{ |
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ls = new i2p::data::LeaseSet (*ls); |
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m_RemoteLeaseSets[ident] = ls; |
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return ls; |
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} |
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} |
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return nullptr; |
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} |
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const i2p::data::LeaseSet * ClientDestination::GetLeaseSet () |
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{ |
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if (!m_Pool) return nullptr; |
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if (!m_LeaseSet) |
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UpdateLeaseSet (); |
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return m_LeaseSet; |
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} |
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void ClientDestination::UpdateLeaseSet () |
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{ |
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auto newLeaseSet = new i2p::data::LeaseSet (*m_Pool); |
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if (!m_LeaseSet) |
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m_LeaseSet = newLeaseSet; |
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else |
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{ |
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// TODO: implement it better |
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*m_LeaseSet = *newLeaseSet; |
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delete newLeaseSet; |
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} |
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} |
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void ClientDestination::ProcessGarlicMessage (I2NPMessage * msg) |
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{ |
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if (m_Service) |
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m_Service->post (std::bind (&ClientDestination::HandleGarlicMessage, this, msg)); |
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else |
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{ |
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LogPrint (eLogWarning, "Destination's thread is not running"); |
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i2p::DeleteI2NPMessage (msg); |
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} |
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} |
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void ClientDestination::ProcessDeliveryStatusMessage (I2NPMessage * msg) |
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{ |
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if (m_Service) |
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m_Service->post (std::bind (&ClientDestination::HandleDeliveryStatusMessage, this, msg)); |
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else |
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{ |
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LogPrint (eLogWarning, "Destination's thread is not running"); |
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i2p::DeleteI2NPMessage (msg); |
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} |
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} |
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void ClientDestination::HandleI2NPMessage (const uint8_t * buf, size_t len, i2p::tunnel::InboundTunnel * from) |
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{ |
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I2NPHeader * header = (I2NPHeader *)buf; |
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switch (header->typeID) |
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{ |
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case eI2NPData: |
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HandleDataMessage (buf + sizeof (I2NPHeader), be16toh (header->size)); |
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break; |
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case eI2NPDatabaseStore: |
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HandleDatabaseStoreMessage (buf + sizeof (I2NPHeader), be16toh (header->size)); |
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i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf), from)); // TODO: remove |
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break; |
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default: |
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i2p::HandleI2NPMessage (CreateI2NPMessage (buf, GetI2NPMessageLength (buf), from)); |
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} |
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} |
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void ClientDestination::HandleDatabaseStoreMessage (const uint8_t * buf, size_t len) |
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{ |
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I2NPDatabaseStoreMsg * msg = (I2NPDatabaseStoreMsg *)buf; |
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size_t offset = sizeof (I2NPDatabaseStoreMsg); |
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if (msg->replyToken) // TODO: |
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offset += 36; |
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if (msg->type == 1) // LeaseSet |
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{ |
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LogPrint (eLogDebug, "Remote LeaseSet"); |
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auto it = m_RemoteLeaseSets.find (msg->key); |
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if (it != m_RemoteLeaseSets.end ()) |
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{ |
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it->second->Update (buf + offset, len - offset); |
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LogPrint (eLogDebug, "Remote LeaseSet updated"); |
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} |
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else |
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{ |
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LogPrint (eLogDebug, "New remote LeaseSet added"); |
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m_RemoteLeaseSets[msg->key] = new i2p::data::LeaseSet (buf + offset, len - offset); |
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} |
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} |
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else |
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LogPrint (eLogError, "Unexpected client's DatabaseStore type ", msg->type, ". Dropped"); |
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} |
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void ClientDestination::HandleDeliveryStatusMessage (I2NPMessage * msg) |
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{ |
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I2NPDeliveryStatusMsg * deliveryStatus = (I2NPDeliveryStatusMsg *)msg->GetPayload (); |
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uint32_t msgID = be32toh (deliveryStatus->msgID); |
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if (msgID == m_PublishReplyToken) |
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{ |
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LogPrint (eLogDebug, "Publishing confirmed"); |
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m_ExcludedFloodfills.clear (); |
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m_PublishReplyToken = 0; |
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i2p::DeleteI2NPMessage (msg); |
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} |
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else |
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i2p::garlic::GarlicDestination::HandleDeliveryStatusMessage (msg); |
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} |
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void ClientDestination::SetLeaseSetUpdated () |
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{ |
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i2p::garlic::GarlicDestination::SetLeaseSetUpdated (); |
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UpdateLeaseSet (); |
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if (m_IsPublic) |
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Publish (); |
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} |
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void ClientDestination::Publish () |
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{ |
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if (!m_LeaseSet || !m_Pool) |
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{ |
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LogPrint (eLogError, "Can't publish non-existing LeaseSet"); |
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return; |
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} |
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if (m_PublishReplyToken) |
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{ |
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LogPrint (eLogInfo, "Publishing is pending"); |
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return; |
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} |
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auto outbound = m_Pool->GetNextOutboundTunnel (); |
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if (!outbound) |
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{ |
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LogPrint ("Can't publish LeaseSet. No outbound tunnels"); |
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return; |
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} |
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std::set<i2p::data::IdentHash> excluded; |
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auto floodfill = i2p::data::netdb.GetClosestFloodfill (m_LeaseSet->GetIdentHash (), m_ExcludedFloodfills); |
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if (!floodfill) |
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{ |
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LogPrint ("Can't publish LeaseSet. No more floodfills found"); |
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m_ExcludedFloodfills.clear (); |
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return; |
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} |
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m_ExcludedFloodfills.insert (floodfill->GetIdentHash ()); |
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LogPrint (eLogDebug, "Publish LeaseSet of ", GetIdentHash ().ToBase32 ()); |
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m_PublishReplyToken = i2p::context.GetRandomNumberGenerator ().GenerateWord32 (); |
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auto msg = WrapMessage (*floodfill, i2p::CreateDatabaseStoreMsg (m_LeaseSet, m_PublishReplyToken)); |
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if (m_PublishConfirmationTimer) |
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{ |
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m_PublishConfirmationTimer->expires_from_now (boost::posix_time::seconds(PUBLISH_CONFIRMATION_TIMEOUT)); |
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m_PublishConfirmationTimer->async_wait (std::bind (&ClientDestination::HandlePublishConfirmationTimer, |
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this, std::placeholders::_1)); |
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} |
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else |
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{ |
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LogPrint (eLogWarning, "Destination's thread is not running"); |
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m_PublishReplyToken = 0; |
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} |
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outbound->SendTunnelDataMsg (floodfill->GetIdentHash (), 0, msg); |
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} |
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void ClientDestination::HandlePublishConfirmationTimer (const boost::system::error_code& ecode) |
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{ |
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if (ecode != boost::asio::error::operation_aborted) |
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{ |
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if (m_PublishReplyToken) |
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{ |
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LogPrint (eLogWarning, "Publish confirmation was not received in ", PUBLISH_CONFIRMATION_TIMEOUT, "seconds. Try again"); |
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m_PublishReplyToken = 0; |
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Publish (); |
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} |
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} |
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} |
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void ClientDestination::HandleDataMessage (const uint8_t * buf, size_t len) |
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{ |
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uint32_t length = be32toh (*(uint32_t *)buf); |
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buf += 4; |
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// we assume I2CP payload |
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switch (buf[9]) |
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{ |
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case PROTOCOL_TYPE_STREAMING: |
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// streaming protocol |
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if (m_StreamingDestination) |
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m_StreamingDestination->HandleDataMessagePayload (buf, length); |
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else |
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LogPrint ("Missing streaming destination"); |
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break; |
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case PROTOCOL_TYPE_DATAGRAM: |
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// datagram protocol |
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if (m_DatagramDestination) |
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m_DatagramDestination->HandleDataMessagePayload (buf, length); |
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else |
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LogPrint ("Missing streaming destination"); |
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break; |
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default: |
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LogPrint ("Data: unexpected protocol ", buf[9]); |
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} |
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} |
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std::shared_ptr<i2p::stream::Stream> ClientDestination::CreateStream (const i2p::data::LeaseSet& remote, int port) |
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{ |
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if (m_StreamingDestination) |
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return m_StreamingDestination->CreateNewOutgoingStream (remote, port); |
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return nullptr; |
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} |
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void ClientDestination::AcceptStreams (const i2p::stream::StreamingDestination::Acceptor& acceptor) |
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{ |
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if (m_StreamingDestination) |
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m_StreamingDestination->SetAcceptor (acceptor); |
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} |
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void ClientDestination::StopAcceptingStreams () |
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{ |
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if (m_StreamingDestination) |
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m_StreamingDestination->ResetAcceptor (); |
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} |
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bool ClientDestination::IsAcceptingStreams () const |
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{ |
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if (m_StreamingDestination) |
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return m_StreamingDestination->IsAcceptorSet (); |
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return false; |
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} |
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i2p::datagram::DatagramDestination * ClientDestination::CreateDatagramDestination () |
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{ |
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if (!m_DatagramDestination) |
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m_DatagramDestination = new i2p::datagram::DatagramDestination (*this); |
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return m_DatagramDestination; |
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} |
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} |
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}
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