mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 08:00:38 +03:00
373 lines
10 KiB
C++
373 lines
10 KiB
C++
#include <fstream>
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#include <algorithm>
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#include <cryptopp/dh.h>
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#include <cryptopp/gzip.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 (bool isPublic, i2p::data::SigningKeyType sigType):
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m_IsRunning (false), m_Thread (nullptr), m_Service (nullptr), m_Work (nullptr),
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m_CurrentOutboundTunnel (nullptr), m_LeaseSet (nullptr), m_IsPublic (isPublic)
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{
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m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (sigType);
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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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m_Pool = i2p::tunnel::tunnels.CreateTunnelPool (*this, 3); // 3-hops tunnel
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if (m_IsPublic)
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LogPrint ("Local address ", GetIdentHash ().ToBase32 (), ".b32.i2p created");
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}
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ClientDestination::ClientDestination (const std::string& fullPath, bool isPublic):
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m_IsRunning (false), m_Thread (nullptr), m_Service (nullptr), m_Work (nullptr),
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m_CurrentOutboundTunnel (nullptr), m_LeaseSet (nullptr), m_IsPublic (isPublic)
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{
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std::ifstream s(fullPath.c_str (), std::ifstream::binary);
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if (s.is_open ())
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{
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s.seekg (0, std::ios::end);
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size_t len = s.tellg();
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s.seekg (0, std::ios::beg);
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uint8_t * buf = new uint8_t[len];
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s.read ((char *)buf, len);
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m_Keys.FromBuffer (buf, len);
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delete[] buf;
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LogPrint ("Local address ", GetIdentHash ().ToBase32 (), ".b32.i2p loaded");
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}
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else
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{
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LogPrint ("Can't open file ", fullPath, " Creating new one");
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m_Keys = i2p::data::PrivateKeys::CreateRandomKeys (i2p::data::SIGNING_KEY_TYPE_DSA_SHA1);
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std::ofstream f (fullPath, std::ofstream::binary | std::ofstream::out);
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size_t len = m_Keys.GetFullLen ();
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uint8_t * buf = new uint8_t[len];
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len = m_Keys.ToBuffer (buf, len);
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f.write ((char *)buf, len);
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delete[] buf;
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LogPrint ("New private keys file ", fullPath, " for ", m_Keys.GetPublic ().GetIdentHash ().ToBase32 (), ".b32.i2p created");
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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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m_Pool = i2p::tunnel::tunnels.CreateTunnelPool (*this, 3); // 3-hops tunnel
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}
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ClientDestination::ClientDestination (const i2p::data::PrivateKeys& keys, bool isPublic):
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m_IsRunning (false), m_Thread (nullptr), m_Service (nullptr), m_Work (nullptr),
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m_Keys (keys), m_CurrentOutboundTunnel (nullptr), m_LeaseSet (nullptr), m_IsPublic (isPublic)
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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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m_Pool = i2p::tunnel::tunnels.CreateTunnelPool (*this, 3); // 3-hops tunnel
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if (m_IsPublic)
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LogPrint ("Local address ", GetIdentHash ().ToBase32 (), ".b32.i2p created");
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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_Service;
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}
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void ClientDestination::Run ()
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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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void ClientDestination::Start ()
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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_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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}
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void ClientDestination::Stop ()
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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_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::SendTunnelDataMsgs (const std::vector<i2p::tunnel::TunnelMessageBlock>& msgs)
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{
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m_CurrentOutboundTunnel = m_Pool->GetNextOutboundTunnel (m_CurrentOutboundTunnel);
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if (m_CurrentOutboundTunnel)
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m_CurrentOutboundTunnel->SendTunnelDataMsg (msgs);
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else
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{
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LogPrint ("No outbound tunnels in the pool");
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for (auto it: msgs)
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DeleteI2NPMessage (it.data);
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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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m_Service->post (boost::bind (&ClientDestination::HandleGarlicMessage, this, msg));
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}
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void ClientDestination::ProcessDeliveryStatusMessage (I2NPMessage * msg)
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{
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m_Service->post (boost::bind (&ClientDestination::HandleDeliveryStatusMessage, this, msg));
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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 ("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 ("Remote LeaseSet updated");
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}
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else
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{
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LogPrint ("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 ("Unexpected client's DatabaseStore type ", msg->type, ". Dropped");
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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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i2p::data::netdb.PublishLeaseSet (m_LeaseSet, m_Pool);
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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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if (buf[9] == 6) // streaming protocol
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{
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// unzip it
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CryptoPP::Gunzip decompressor;
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decompressor.Put (buf, length);
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decompressor.MessageEnd();
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i2p::stream::Packet * uncompressed = new i2p::stream::Packet;
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uncompressed->offset = 0;
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uncompressed->len = decompressor.MaxRetrievable ();
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if (uncompressed->len <= i2p::stream::MAX_PACKET_SIZE)
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{
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decompressor.Get (uncompressed->buf, uncompressed->len);
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HandleNextPacket (uncompressed);
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}
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else
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{
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LogPrint ("Received packet size ", uncompressed->len, " exceeds max packet size. Skipped");
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decompressor.Skip ();
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delete uncompressed;
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}
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}
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else
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LogPrint ("Data: unexpected protocol ", buf[9]);
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}
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I2NPMessage * ClientDestination::CreateDataMessage (const uint8_t * payload, size_t len)
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{
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I2NPMessage * msg = NewI2NPShortMessage ();
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CryptoPP::Gzip compressor;
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if (len <= i2p::stream::COMPRESSION_THRESHOLD_SIZE)
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compressor.SetDeflateLevel (CryptoPP::Gzip::MIN_DEFLATE_LEVEL);
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else
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compressor.SetDeflateLevel (CryptoPP::Gzip::DEFAULT_DEFLATE_LEVEL);
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compressor.Put (payload, len);
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compressor.MessageEnd();
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int size = compressor.MaxRetrievable ();
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uint8_t * buf = msg->GetPayload ();
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*(uint32_t *)buf = htobe32 (size); // length
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buf += 4;
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compressor.Get (buf, size);
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memset (buf + 4, 0, 4); // source and destination ports. TODO: fill with proper values later
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buf[9] = 6; // streaming protocol
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msg->len += size + 4;
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FillI2NPMessageHeader (msg, eI2NPData);
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return msg;
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}
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}
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namespace stream
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{
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void StreamingDestination::Start ()
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{
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ClientDestination::Start ();
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}
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void StreamingDestination::Stop ()
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{
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ResetAcceptor ();
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{
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std::unique_lock<std::mutex> l(m_StreamsMutex);
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for (auto it: m_Streams)
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delete it.second;
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m_Streams.clear ();
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}
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ClientDestination::Stop ();
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}
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void StreamingDestination::HandleNextPacket (Packet * packet)
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{
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uint32_t sendStreamID = packet->GetSendStreamID ();
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if (sendStreamID)
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{
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auto it = m_Streams.find (sendStreamID);
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if (it != m_Streams.end ())
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it->second->HandleNextPacket (packet);
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else
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{
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LogPrint ("Unknown stream ", sendStreamID);
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delete packet;
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}
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}
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else // new incoming stream
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{
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auto incomingStream = CreateNewIncomingStream ();
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incomingStream->HandleNextPacket (packet);
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if (m_Acceptor != nullptr)
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m_Acceptor (incomingStream);
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else
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{
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LogPrint ("Acceptor for incoming stream is not set");
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DeleteStream (incomingStream);
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}
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}
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}
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Stream * StreamingDestination::CreateNewOutgoingStream (const i2p::data::LeaseSet& remote)
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{
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Stream * s = new Stream (*GetService (), *this, remote);
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std::unique_lock<std::mutex> l(m_StreamsMutex);
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m_Streams[s->GetRecvStreamID ()] = s;
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return s;
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}
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Stream * StreamingDestination::CreateNewIncomingStream ()
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{
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Stream * s = new Stream (*GetService (), *this);
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std::unique_lock<std::mutex> l(m_StreamsMutex);
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m_Streams[s->GetRecvStreamID ()] = s;
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return s;
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}
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void StreamingDestination::DeleteStream (Stream * stream)
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{
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if (stream)
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{
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std::unique_lock<std::mutex> l(m_StreamsMutex);
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auto it = m_Streams.find (stream->GetRecvStreamID ());
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if (it != m_Streams.end ())
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{
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m_Streams.erase (it);
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if (GetService ())
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GetService ()->post ([stream](void) { delete stream; });
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else
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delete stream;
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}
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}
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}
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}
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}
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