mirror of https://github.com/PurpleI2P/i2pd
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
402 lines
11 KiB
C++
402 lines
11 KiB
C++
#include <cryptopp/dh.h>
|
|
#include <boost/bind.hpp>
|
|
#include "Log.h"
|
|
#include "CryptoConst.h"
|
|
#include "RouterContext.h"
|
|
#include "I2NPProtocol.h"
|
|
#include "NetDb.h"
|
|
#include "Transports.h"
|
|
|
|
using namespace i2p::data;
|
|
|
|
namespace i2p
|
|
{
|
|
namespace transport
|
|
{
|
|
DHKeysPairSupplier::DHKeysPairSupplier (int size):
|
|
m_QueueSize (size), m_IsRunning (false), m_Thread (nullptr)
|
|
{
|
|
}
|
|
|
|
DHKeysPairSupplier::~DHKeysPairSupplier ()
|
|
{
|
|
Stop ();
|
|
}
|
|
|
|
void DHKeysPairSupplier::Start ()
|
|
{
|
|
m_IsRunning = true;
|
|
m_Thread = new std::thread (std::bind (&DHKeysPairSupplier::Run, this));
|
|
}
|
|
|
|
void DHKeysPairSupplier::Stop ()
|
|
{
|
|
m_IsRunning = false;
|
|
m_Acquired.notify_one ();
|
|
if (m_Thread)
|
|
{
|
|
m_Thread->join ();
|
|
delete m_Thread;
|
|
m_Thread = 0;
|
|
}
|
|
}
|
|
|
|
void DHKeysPairSupplier::Run ()
|
|
{
|
|
while (m_IsRunning)
|
|
{
|
|
int num;
|
|
while ((num = m_QueueSize - m_Queue.size ()) > 0)
|
|
CreateDHKeysPairs (num);
|
|
std::unique_lock<std::mutex> l(m_AcquiredMutex);
|
|
m_Acquired.wait (l); // wait for element gets aquired
|
|
}
|
|
}
|
|
|
|
void DHKeysPairSupplier::CreateDHKeysPairs (int num)
|
|
{
|
|
if (num > 0)
|
|
{
|
|
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
|
|
for (int i = 0; i < num; i++)
|
|
{
|
|
i2p::transport::DHKeysPair * pair = new i2p::transport::DHKeysPair ();
|
|
dh.GenerateKeyPair(m_Rnd, pair->privateKey, pair->publicKey);
|
|
std::unique_lock<std::mutex> l(m_AcquiredMutex);
|
|
m_Queue.push (pair);
|
|
}
|
|
}
|
|
}
|
|
|
|
DHKeysPair * DHKeysPairSupplier::Acquire ()
|
|
{
|
|
if (!m_Queue.empty ())
|
|
{
|
|
std::unique_lock<std::mutex> l(m_AcquiredMutex);
|
|
auto pair = m_Queue.front ();
|
|
m_Queue.pop ();
|
|
m_Acquired.notify_one ();
|
|
return pair;
|
|
}
|
|
else // queue is empty, create new
|
|
{
|
|
DHKeysPair * pair = new DHKeysPair ();
|
|
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
|
|
dh.GenerateKeyPair(m_Rnd, pair->privateKey, pair->publicKey);
|
|
return pair;
|
|
}
|
|
}
|
|
|
|
void DHKeysPairSupplier::Return (DHKeysPair * pair)
|
|
{
|
|
std::unique_lock<std::mutex> l(m_AcquiredMutex);
|
|
m_Queue.push (pair);
|
|
}
|
|
|
|
Transports transports;
|
|
|
|
Transports::Transports ():
|
|
m_Thread (nullptr), m_Work (m_Service), m_NTCPAcceptor (nullptr), m_NTCPV6Acceptor (nullptr),
|
|
m_SSUServer (nullptr), m_DHKeysPairSupplier (5) // 5 pre-generated keys
|
|
{
|
|
}
|
|
|
|
Transports::~Transports ()
|
|
{
|
|
Stop ();
|
|
}
|
|
|
|
void Transports::Start ()
|
|
{
|
|
m_DHKeysPairSupplier.Start ();
|
|
m_IsRunning = true;
|
|
m_Thread = new std::thread (std::bind (&Transports::Run, this));
|
|
// create acceptors
|
|
auto addresses = context.GetRouterInfo ().GetAddresses ();
|
|
for (auto& address : addresses)
|
|
{
|
|
if (address.transportStyle == RouterInfo::eTransportNTCP && address.host.is_v4 ())
|
|
{
|
|
m_NTCPAcceptor = new boost::asio::ip::tcp::acceptor (m_Service,
|
|
boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), address.port));
|
|
|
|
LogPrint ("Start listening TCP port ", address.port);
|
|
auto conn = std::make_shared<NTCPSession>(m_Service);
|
|
m_NTCPAcceptor->async_accept(conn->GetSocket (), boost::bind (&Transports::HandleAccept, this,
|
|
conn, boost::asio::placeholders::error));
|
|
|
|
if (context.SupportsV6 ())
|
|
{
|
|
m_NTCPV6Acceptor = new boost::asio::ip::tcp::acceptor (m_Service);
|
|
m_NTCPV6Acceptor->open (boost::asio::ip::tcp::v6());
|
|
m_NTCPV6Acceptor->set_option (boost::asio::ip::v6_only (true));
|
|
m_NTCPV6Acceptor->bind (boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v6(), address.port));
|
|
m_NTCPV6Acceptor->listen ();
|
|
|
|
LogPrint ("Start listening V6 TCP port ", address.port);
|
|
auto conn = std::make_shared<NTCPSession> (m_Service);
|
|
m_NTCPV6Acceptor->async_accept(conn->GetSocket (), boost::bind (&Transports::HandleAcceptV6,
|
|
this, conn, boost::asio::placeholders::error));
|
|
}
|
|
}
|
|
else if (address.transportStyle == RouterInfo::eTransportSSU && address.host.is_v4 ())
|
|
{
|
|
if (!m_SSUServer)
|
|
{
|
|
m_SSUServer = new SSUServer (address.port);
|
|
LogPrint ("Start listening UDP port ", address.port);
|
|
m_SSUServer->Start ();
|
|
DetectExternalIP ();
|
|
}
|
|
else
|
|
LogPrint ("SSU server already exists");
|
|
}
|
|
}
|
|
}
|
|
|
|
void Transports::Stop ()
|
|
{
|
|
if (m_SSUServer)
|
|
{
|
|
m_SSUServer->Stop ();
|
|
delete m_SSUServer;
|
|
m_SSUServer = nullptr;
|
|
}
|
|
m_NTCPSessions.clear ();
|
|
|
|
delete m_NTCPAcceptor;
|
|
m_NTCPAcceptor = nullptr;
|
|
delete m_NTCPV6Acceptor;
|
|
m_NTCPV6Acceptor = nullptr;
|
|
|
|
m_DHKeysPairSupplier.Stop ();
|
|
m_IsRunning = false;
|
|
m_Service.stop ();
|
|
if (m_Thread)
|
|
{
|
|
m_Thread->join ();
|
|
delete m_Thread;
|
|
m_Thread = nullptr;
|
|
}
|
|
}
|
|
|
|
void Transports::Run ()
|
|
{
|
|
while (m_IsRunning)
|
|
{
|
|
try
|
|
{
|
|
m_Service.run ();
|
|
}
|
|
catch (std::exception& ex)
|
|
{
|
|
LogPrint ("Transports: ", ex.what ());
|
|
}
|
|
}
|
|
}
|
|
|
|
void Transports::AddNTCPSession (std::shared_ptr<NTCPSession> session)
|
|
{
|
|
if (session)
|
|
m_NTCPSessions[session->GetRemoteIdentity ().GetIdentHash ()] = session;
|
|
}
|
|
|
|
void Transports::RemoveNTCPSession (std::shared_ptr<NTCPSession> session)
|
|
{
|
|
if (session)
|
|
m_NTCPSessions.erase (session->GetRemoteIdentity ().GetIdentHash ());
|
|
}
|
|
|
|
void Transports::HandleAccept (std::shared_ptr<NTCPSession> conn, const boost::system::error_code& error)
|
|
{
|
|
if (!error)
|
|
{
|
|
LogPrint ("Connected from ", conn->GetSocket ().remote_endpoint().address ().to_string ());
|
|
conn->ServerLogin ();
|
|
}
|
|
|
|
|
|
if (error != boost::asio::error::operation_aborted)
|
|
{
|
|
conn = std::make_shared<NTCPSession> (m_Service);
|
|
m_NTCPAcceptor->async_accept(conn->GetSocket (), boost::bind (&Transports::HandleAccept, this,
|
|
conn, boost::asio::placeholders::error));
|
|
}
|
|
}
|
|
|
|
void Transports::HandleAcceptV6 (std::shared_ptr<NTCPSession> conn, const boost::system::error_code& error)
|
|
{
|
|
if (!error)
|
|
{
|
|
LogPrint ("Connected from ", conn->GetSocket ().remote_endpoint().address ().to_string ());
|
|
conn->ServerLogin ();
|
|
}
|
|
|
|
if (error != boost::asio::error::operation_aborted)
|
|
{
|
|
conn = std::make_shared<NTCPSession> (m_Service);
|
|
m_NTCPV6Acceptor->async_accept(conn->GetSocket (), boost::bind (&Transports::HandleAcceptV6, this,
|
|
conn, boost::asio::placeholders::error));
|
|
}
|
|
}
|
|
|
|
void Transports::Connect (const boost::asio::ip::address& address, int port, std::shared_ptr<NTCPSession> conn)
|
|
{
|
|
LogPrint ("Connecting to ", address ,":", port);
|
|
conn->GetSocket ().async_connect (boost::asio::ip::tcp::endpoint (address, port),
|
|
boost::bind (&Transports::HandleConnect, this, boost::asio::placeholders::error, conn));
|
|
}
|
|
|
|
void Transports::HandleConnect (const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn)
|
|
{
|
|
if (ecode)
|
|
{
|
|
LogPrint ("Connect error: ", ecode.message ());
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
i2p::data::netdb.SetUnreachable (conn->GetRemoteIdentity ().GetIdentHash (), true);
|
|
conn->Terminate ();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
LogPrint ("Connected");
|
|
if (conn->GetSocket ().local_endpoint ().protocol () == boost::asio::ip::tcp::v6()) // ipv6
|
|
context.UpdateNTCPV6Address (conn->GetSocket ().local_endpoint ().address ());
|
|
conn->ClientLogin ();
|
|
}
|
|
}
|
|
|
|
std::shared_ptr<NTCPSession> Transports::GetNextNTCPSession ()
|
|
{
|
|
for (auto session: m_NTCPSessions)
|
|
if (session.second->IsEstablished ())
|
|
return session.second;
|
|
return 0;
|
|
}
|
|
|
|
std::shared_ptr<NTCPSession> Transports::FindNTCPSession (const i2p::data::IdentHash& ident)
|
|
{
|
|
auto it = m_NTCPSessions.find (ident);
|
|
if (it != m_NTCPSessions.end ())
|
|
return it->second;
|
|
return 0;
|
|
}
|
|
|
|
void Transports::SendMessage (const i2p::data::IdentHash& ident, i2p::I2NPMessage * msg)
|
|
{
|
|
if (ident == i2p::context.GetRouterInfo ().GetIdentHash ())
|
|
// we send it to ourself
|
|
i2p::HandleI2NPMessage (msg);
|
|
else
|
|
m_Service.post (boost::bind (&Transports::PostMessage, this, ident, msg));
|
|
}
|
|
|
|
void Transports::PostMessage (const i2p::data::IdentHash& ident, i2p::I2NPMessage * msg)
|
|
{
|
|
auto session = FindNTCPSession (ident);
|
|
if (session)
|
|
session->SendI2NPMessage (msg);
|
|
else
|
|
{
|
|
auto r = netdb.FindRouter (ident);
|
|
if (r)
|
|
{
|
|
auto ssuSession = m_SSUServer ? m_SSUServer->FindSession (r) : nullptr;
|
|
if (ssuSession)
|
|
ssuSession->SendI2NPMessage (msg);
|
|
else
|
|
{
|
|
// existing session not found. create new
|
|
// try NTCP first if message size < 16K
|
|
auto address = r->GetNTCPAddress (!context.SupportsV6 ());
|
|
if (address && !r->UsesIntroducer () && !r->IsUnreachable () && msg->GetLength () < NTCP_MAX_MESSAGE_SIZE)
|
|
{
|
|
auto s = std::make_shared<NTCPSession> (m_Service, r);
|
|
AddNTCPSession (s);
|
|
s->SendI2NPMessage (msg);
|
|
Connect (address->host, address->port, s);
|
|
}
|
|
else
|
|
{
|
|
// then SSU
|
|
auto s = m_SSUServer ? m_SSUServer->GetSession (r) : nullptr;
|
|
if (s)
|
|
s->SendI2NPMessage (msg);
|
|
else
|
|
{
|
|
LogPrint ("No NTCP and SSU addresses available");
|
|
DeleteI2NPMessage (msg);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
LogPrint ("Router not found. Requested");
|
|
i2p::data::netdb.RequestDestination (ident);
|
|
auto resendTimer = new boost::asio::deadline_timer (m_Service);
|
|
resendTimer->expires_from_now (boost::posix_time::seconds(5)); // 5 seconds
|
|
resendTimer->async_wait (boost::bind (&Transports::HandleResendTimer,
|
|
this, boost::asio::placeholders::error, resendTimer, ident, msg));
|
|
}
|
|
}
|
|
}
|
|
|
|
void Transports::HandleResendTimer (const boost::system::error_code& ecode,
|
|
boost::asio::deadline_timer * timer, const i2p::data::IdentHash& ident, i2p::I2NPMessage * msg)
|
|
{
|
|
auto r = netdb.FindRouter (ident);
|
|
if (r)
|
|
{
|
|
LogPrint ("Router found. Sending message");
|
|
PostMessage (ident, msg);
|
|
}
|
|
else
|
|
{
|
|
LogPrint ("Router not found. Failed to send message");
|
|
DeleteI2NPMessage (msg);
|
|
}
|
|
delete timer;
|
|
}
|
|
|
|
void Transports::CloseSession (std::shared_ptr<const i2p::data::RouterInfo> router)
|
|
{
|
|
if (!router) return;
|
|
m_Service.post (boost::bind (&Transports::PostCloseSession, this, router));
|
|
}
|
|
|
|
void Transports::PostCloseSession (std::shared_ptr<const i2p::data::RouterInfo> router)
|
|
{
|
|
auto ssuSession = m_SSUServer ? m_SSUServer->FindSession (router) : nullptr;
|
|
if (ssuSession) // try SSU first
|
|
{
|
|
m_SSUServer->DeleteSession (ssuSession);
|
|
LogPrint ("SSU session closed");
|
|
}
|
|
// TODO: delete NTCP
|
|
}
|
|
|
|
void Transports::DetectExternalIP ()
|
|
{
|
|
for (int i = 0; i < 5; i++)
|
|
{
|
|
auto router = i2p::data::netdb.GetRandomRouter ();
|
|
if (router && router->IsSSU () && m_SSUServer)
|
|
m_SSUServer->GetSession (router, true); // peer test
|
|
}
|
|
}
|
|
|
|
DHKeysPair * Transports::GetNextDHKeysPair ()
|
|
{
|
|
return m_DHKeysPairSupplier.Acquire ();
|
|
}
|
|
|
|
void Transports::ReuseDHKeysPair (DHKeysPair * pair)
|
|
{
|
|
m_DHKeysPairSupplier.Return (pair);
|
|
}
|
|
}
|
|
}
|
|
|