i2pd/I2PTunnel.cpp

281 lines
7.9 KiB
C++
Raw Normal View History

2015-01-06 22:51:10 +00:00
#include <cassert>
2014-08-13 19:25:52 +00:00
#include "base64.h"
#include "Log.h"
#include "Destination.h"
2014-10-16 00:52:17 +00:00
#include "ClientContext.h"
2014-08-13 01:14:19 +00:00
#include "I2PTunnel.h"
namespace i2p
{
namespace client
2014-08-13 01:14:19 +00:00
{
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner,
2015-01-27 16:27:58 +00:00
boost::asio::ip::tcp::socket * socket, std::shared_ptr<const i2p::data::LeaseSet> leaseSet):
I2PServiceHandler(owner), m_Socket (socket), m_RemoteEndpoint (socket->remote_endpoint ()),
m_IsQuiet (true)
2014-08-13 01:14:19 +00:00
{
2015-01-27 16:27:58 +00:00
m_Stream = GetOwner()->GetLocalDestination ()->CreateStream (leaseSet);
2014-08-13 01:14:19 +00:00
}
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner,
boost::asio::ip::tcp::socket * socket, std::shared_ptr<i2p::stream::Stream> stream):
I2PServiceHandler(owner), m_Socket (socket), m_Stream (stream),
m_RemoteEndpoint (socket->remote_endpoint ()), m_IsQuiet (true)
{
}
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
boost::asio::ip::tcp::socket * socket, const boost::asio::ip::tcp::endpoint& target, bool quiet):
I2PServiceHandler(owner), m_Socket (socket), m_Stream (stream),
m_RemoteEndpoint (target), m_IsQuiet (quiet)
2014-08-20 19:03:10 +00:00
{
}
2014-08-13 01:14:19 +00:00
I2PTunnelConnection::~I2PTunnelConnection ()
{
delete m_Socket;
2014-08-14 01:04:23 +00:00
}
void I2PTunnelConnection::I2PConnect (const uint8_t * msg, size_t len)
2014-11-24 03:23:17 +00:00
{
2015-01-06 22:51:10 +00:00
if (m_Stream)
{
if (msg)
m_Stream->Send (msg, len); // connect and send
else
m_Stream->Send (m_Buffer, 0); // connect
}
2014-11-24 03:23:17 +00:00
StreamReceive ();
Receive ();
}
void I2PTunnelConnection::Connect ()
{
if (m_Socket)
m_Socket->async_connect (m_RemoteEndpoint, std::bind (&I2PTunnelConnection::HandleConnect,
shared_from_this (), std::placeholders::_1));
}
2014-08-14 01:04:23 +00:00
void I2PTunnelConnection::Terminate ()
{
if (Kill()) return;
2014-10-08 23:44:12 +00:00
if (m_Stream)
{
m_Stream->Close ();
2014-11-23 16:33:58 +00:00
m_Stream.reset ();
2014-10-08 23:44:12 +00:00
}
2014-08-17 23:14:40 +00:00
m_Socket->close ();
Done(shared_from_this ());
2014-08-13 19:25:52 +00:00
}
void I2PTunnelConnection::Receive ()
{
m_Socket->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
2014-11-24 03:23:17 +00:00
std::bind(&I2PTunnelConnection::HandleReceived, shared_from_this (),
std::placeholders::_1, std::placeholders::_2));
2014-08-13 19:25:52 +00:00
}
void I2PTunnelConnection::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
2015-01-03 02:57:37 +00:00
{
2014-08-13 19:25:52 +00:00
LogPrint ("I2PTunnel read error: ", ecode.message ());
2014-10-08 23:44:12 +00:00
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
2014-08-13 19:25:52 +00:00
}
else
2014-08-14 01:04:23 +00:00
{
2014-08-13 19:25:52 +00:00
if (m_Stream)
2014-10-02 01:18:41 +00:00
m_Stream->Send (m_Buffer, bytes_transferred);
2014-08-13 19:25:52 +00:00
Receive ();
}
}
void I2PTunnelConnection::HandleWrite (const boost::system::error_code& ecode)
{
2014-08-17 23:14:40 +00:00
if (ecode)
{
LogPrint ("I2PTunnel write error: ", ecode.message ());
2014-10-08 23:44:12 +00:00
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
2014-08-17 23:14:40 +00:00
}
else
StreamReceive ();
2014-08-13 19:25:52 +00:00
}
void I2PTunnelConnection::StreamReceive ()
{
if (m_Stream)
m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
2014-11-24 03:23:17 +00:00
std::bind (&I2PTunnelConnection::HandleStreamReceive, shared_from_this (),
std::placeholders::_1, std::placeholders::_2),
2014-08-13 19:25:52 +00:00
I2P_TUNNEL_CONNECTION_MAX_IDLE);
2014-08-13 01:14:19 +00:00
}
2014-08-13 19:25:52 +00:00
void I2PTunnelConnection::HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("I2PTunnel stream read error: ", ecode.message ());
2014-10-08 23:44:12 +00:00
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
2014-08-13 19:25:52 +00:00
}
else
{
boost::asio::async_write (*m_Socket, boost::asio::buffer (m_StreamBuffer, bytes_transferred),
2014-11-24 03:23:17 +00:00
std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1));
2014-08-13 19:25:52 +00:00
}
}
2014-08-20 19:03:10 +00:00
void I2PTunnelConnection::HandleConnect (const boost::system::error_code& ecode)
{
if (ecode)
{
LogPrint ("I2PTunnel connect error: ", ecode.message ());
2014-11-24 03:23:17 +00:00
Terminate ();
2014-08-20 19:03:10 +00:00
}
else
{
LogPrint ("I2PTunnel connected");
if (m_IsQuiet)
StreamReceive ();
else
{
// send destination first like received from I2P
std::string dest = m_Stream->GetRemoteIdentity ().ToBase64 ();
dest += "\n";
memcpy (m_StreamBuffer, dest.c_str (), dest.size ());
HandleStreamReceive (boost::system::error_code (), dest.size ());
}
2014-08-20 19:03:10 +00:00
Receive ();
}
}
/* This handler tries to stablish a connection with the desired server and dies if it fails to do so */
class I2PClientTunnelHandler: public I2PServiceHandler, public std::enable_shared_from_this<I2PClientTunnelHandler>
{
public:
I2PClientTunnelHandler (I2PClientTunnel * parent, i2p::data::IdentHash destination,
boost::asio::ip::tcp::socket * socket):
I2PServiceHandler(parent), m_DestinationIdentHash(destination), m_Socket(socket) {}
void Handle();
void Terminate();
private:
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
i2p::data::IdentHash m_DestinationIdentHash;
boost::asio::ip::tcp::socket * m_Socket;
};
void I2PClientTunnelHandler::Handle()
{
GetOwner()->GetLocalDestination ()->CreateStream (std::bind (&I2PClientTunnelHandler::HandleStreamRequestComplete,
shared_from_this(), std::placeholders::_1), m_DestinationIdentHash);
}
void I2PClientTunnelHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
{
if (stream)
{
if (Kill()) return;
LogPrint (eLogInfo,"New I2PTunnel connection");
auto connection = std::make_shared<I2PTunnelConnection>(GetOwner(), m_Socket, stream);
GetOwner()->AddHandler (connection);
connection->I2PConnect ();
Done(shared_from_this());
}
else
{
LogPrint (eLogError,"I2P Client Tunnel Issue when creating the stream, check the previous warnings for more info.");
Terminate();
}
}
void I2PClientTunnelHandler::Terminate()
{
if (Kill()) return;
if (m_Socket)
{
m_Socket->close();
delete m_Socket;
m_Socket = nullptr;
}
Done(shared_from_this());
}
I2PClientTunnel::I2PClientTunnel (const std::string& destination, int port, ClientDestination * localDestination):
2015-01-08 02:49:35 +00:00
TCPIPAcceptor (port,localDestination), m_Destination (destination), m_DestinationIdentHash (nullptr)
{}
2014-08-13 01:14:19 +00:00
2014-08-13 19:25:52 +00:00
void I2PClientTunnel::Start ()
{
TCPIPAcceptor::Start ();
GetIdentHash();
2014-08-13 19:25:52 +00:00
}
void I2PClientTunnel::Stop ()
{
2015-01-08 02:49:35 +00:00
TCPIPAcceptor::Stop();
2015-01-03 01:07:55 +00:00
auto *originalIdentHash = m_DestinationIdentHash;
2014-08-13 19:25:52 +00:00
m_DestinationIdentHash = nullptr;
2015-01-03 01:07:55 +00:00
delete originalIdentHash;
2014-08-13 19:25:52 +00:00
}
/* HACK: maybe we should create a caching IdentHash provider in AddressBook */
const i2p::data::IdentHash * I2PClientTunnel::GetIdentHash ()
{
if (!m_DestinationIdentHash)
{
i2p::data::IdentHash identHash;
if (i2p::client::context.GetAddressBook ().GetIdentHash (m_Destination, identHash))
m_DestinationIdentHash = new i2p::data::IdentHash (identHash);
else
LogPrint (eLogWarning,"Remote destination ", m_Destination, " not found");
}
return m_DestinationIdentHash;
}
2015-01-08 02:49:35 +00:00
std::shared_ptr<I2PServiceHandler> I2PClientTunnel::CreateHandler(boost::asio::ip::tcp::socket * socket)
2014-08-13 01:14:19 +00:00
{
2015-01-08 02:49:35 +00:00
const i2p::data::IdentHash *identHash = GetIdentHash();
if (identHash)
return std::make_shared<I2PClientTunnelHandler>(this, *identHash, socket);
2014-08-13 01:14:19 +00:00
else
2015-01-08 02:49:35 +00:00
return nullptr;
2014-10-15 16:07:06 +00:00
}
I2PServerTunnel::I2PServerTunnel (const std::string& address, int port, ClientDestination * localDestination):
I2PService (localDestination), m_Endpoint (boost::asio::ip::address::from_string (address), port)
2014-08-20 19:03:10 +00:00
{
}
void I2PServerTunnel::Start ()
{
Accept ();
}
void I2PServerTunnel::Stop ()
{
ClearHandlers ();
2014-08-20 19:03:10 +00:00
}
void I2PServerTunnel::Accept ()
{
auto localDestination = GetLocalDestination ();
if (localDestination)
localDestination->AcceptStreams (std::bind (&I2PServerTunnel::HandleAccept, this, std::placeholders::_1));
else
LogPrint ("Local destination not set for server tunnel");
2014-08-20 19:03:10 +00:00
}
2014-11-23 16:33:58 +00:00
void I2PServerTunnel::HandleAccept (std::shared_ptr<i2p::stream::Stream> stream)
2014-08-20 19:03:10 +00:00
{
if (stream)
2014-11-24 03:23:17 +00:00
{
auto conn = std::make_shared<I2PTunnelConnection> (this, stream, new boost::asio::ip::tcp::socket (GetService ()), m_Endpoint);
AddHandler (conn);
2014-11-24 03:23:17 +00:00
conn->Connect ();
}
2014-08-20 19:03:10 +00:00
}
2014-08-13 01:14:19 +00:00
}
}