i2pd/I2PTunnel.cpp
Francisco Blas (klondike) Izquierdo Riera b88b04515e Remove unnecessary RemoteLeaseSet
2015-01-03 06:44:21 +01:00

294 lines
7.9 KiB
C++

#include "base64.h"
#include "Log.h"
#include "Destination.h"
#include "ClientContext.h"
#include "I2PTunnel.h"
namespace i2p
{
namespace client
{
I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner,
boost::asio::ip::tcp::socket * socket, const i2p::data::LeaseSet * leaseSet):
m_Socket (socket), m_Owner (owner), m_RemoteEndpoint (socket->remote_endpoint ()),
m_IsQuiet (true)
{
m_Stream = m_Owner->GetLocalDestination ()->CreateStream (*leaseSet);
}
I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner,
boost::asio::ip::tcp::socket * socket, std::shared_ptr<i2p::stream::Stream> stream):
m_Socket (socket), m_Stream (stream), m_Owner (owner),
m_RemoteEndpoint (socket->remote_endpoint ()), m_IsQuiet (true)
{
}
I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner, std::shared_ptr<i2p::stream::Stream> stream,
boost::asio::ip::tcp::socket * socket, const boost::asio::ip::tcp::endpoint& target, bool quiet):
m_Socket (socket), m_Stream (stream), m_Owner (owner), m_RemoteEndpoint (target), m_IsQuiet (quiet)
{
}
I2PTunnelConnection::~I2PTunnelConnection ()
{
delete m_Socket;
}
void I2PTunnelConnection::I2PConnect (const uint8_t * msg, size_t len)
{
if (msg)
m_Stream->Send (msg, len); // connect and send
else
m_Stream->Send (m_Buffer, 0); // connect
StreamReceive ();
Receive ();
}
void I2PTunnelConnection::Connect ()
{
if (m_Socket)
m_Socket->async_connect (m_RemoteEndpoint, std::bind (&I2PTunnelConnection::HandleConnect,
shared_from_this (), std::placeholders::_1));
}
void I2PTunnelConnection::Terminate ()
{
if (m_Stream)
{
m_Stream->Close ();
m_Stream.reset ();
}
m_Socket->close ();
if (m_Owner)
m_Owner->RemoveConnection (shared_from_this ());
}
void I2PTunnelConnection::Receive ()
{
m_Socket->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
std::bind(&I2PTunnelConnection::HandleReceived, shared_from_this (),
std::placeholders::_1, std::placeholders::_2));
}
void I2PTunnelConnection::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("I2PTunnel read error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
if (m_Stream)
m_Stream->Send (m_Buffer, bytes_transferred);
Receive ();
}
}
void I2PTunnelConnection::HandleWrite (const boost::system::error_code& ecode)
{
if (ecode)
{
LogPrint ("I2PTunnel write error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
StreamReceive ();
}
void I2PTunnelConnection::StreamReceive ()
{
if (m_Stream)
m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
std::bind (&I2PTunnelConnection::HandleStreamReceive, shared_from_this (),
std::placeholders::_1, std::placeholders::_2),
I2P_TUNNEL_CONNECTION_MAX_IDLE);
}
void I2PTunnelConnection::HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("I2PTunnel stream read error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
boost::asio::async_write (*m_Socket, boost::asio::buffer (m_StreamBuffer, bytes_transferred),
std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1));
}
}
void I2PTunnelConnection::HandleConnect (const boost::system::error_code& ecode)
{
if (ecode)
{
LogPrint ("I2PTunnel connect error: ", ecode.message ());
Terminate ();
}
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 ());
}
Receive ();
}
}
I2PTunnel::I2PTunnel (ClientDestination * localDestination) :
m_LocalDestination (localDestination ? localDestination :
i2p::client::context.CreateNewLocalDestination (false, I2P_TUNNEL_DEFAULT_KEY_TYPE))
{
}
void I2PTunnel::AddConnection (std::shared_ptr<I2PTunnelConnection> conn)
{
m_Connections.insert (conn);
}
void I2PTunnel::RemoveConnection (std::shared_ptr<I2PTunnelConnection> conn)
{
m_Connections.erase (conn);
}
void I2PTunnel::ClearConnections ()
{
m_Connections.clear ();
}
I2PClientTunnel::I2PClientTunnel (const std::string& destination, int port, ClientDestination * localDestination):
I2PTunnel (localDestination),
m_Acceptor (GetService (), boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
m_Timer (GetService ()), m_Destination (destination), m_DestinationIdentHash (nullptr)
{
}
I2PClientTunnel::~I2PClientTunnel ()
{
Stop ();
}
void I2PClientTunnel::Start ()
{
GetIdentHash();
m_Acceptor.listen ();
Accept ();
}
void I2PClientTunnel::Stop ()
{
m_Acceptor.close();
m_Timer.cancel ();
ClearConnections ();
auto *originalIdentHash = m_DestinationIdentHash;
m_DestinationIdentHash = nullptr;
delete originalIdentHash;
}
/* 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;
}
void I2PClientTunnel::Accept ()
{
auto newSocket = new boost::asio::ip::tcp::socket (GetService ());
m_Acceptor.async_accept (*newSocket, std::bind (&I2PClientTunnel::HandleAccept, this,
std::placeholders::_1, newSocket));
}
void I2PClientTunnel::HandleAccept (const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket)
{
if (!ecode)
{
const i2p::data::IdentHash *identHash = GetIdentHash();
if (identHash)
GetLocalDestination ()->CreateStream (
std::bind (&I2PClientTunnel::HandleStreamRequestComplete,
this, std::placeholders::_1, socket), *identHash);
else
{
LogPrint (eLogError,"Closing socket");
delete socket;
}
Accept ();
}
else
{
LogPrint (eLogError,"Closing socket on accept because: ", ecode.message ());
delete socket;
}
}
void I2PClientTunnel::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream, boost::asio::ip::tcp::socket * socket)
{
if (stream)
{
LogPrint (eLogInfo,"New I2PTunnel connection");
auto connection = std::make_shared<I2PTunnelConnection>(this, socket, stream);
AddConnection (connection);
connection->I2PConnect ();
}
else
{
LogPrint (eLogError,"Issue when creating the stream, check the previous warnings for more info.");
delete socket;
}
}
I2PServerTunnel::I2PServerTunnel (const std::string& address, int port, ClientDestination * localDestination):
I2PTunnel (localDestination), m_Endpoint (boost::asio::ip::address::from_string (address), port)
{
}
void I2PServerTunnel::Start ()
{
Accept ();
}
void I2PServerTunnel::Stop ()
{
ClearConnections ();
}
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");
}
void I2PServerTunnel::HandleAccept (std::shared_ptr<i2p::stream::Stream> stream)
{
if (stream)
{
auto conn = std::make_shared<I2PTunnelConnection> (this, stream, new boost::asio::ip::tcp::socket (GetService ()), m_Endpoint);
AddConnection (conn);
conn->Connect ();
}
}
}
}