mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-17 21:26:04 +00:00
300 lines
8.2 KiB
C++
300 lines
8.2 KiB
C++
#include "base64.h"
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#include "Log.h"
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#include "Destination.h"
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#include "ClientContext.h"
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#include "I2PTunnel.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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I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner,
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boost::asio::ip::tcp::socket * socket, const i2p::data::LeaseSet * leaseSet):
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m_Socket (socket), m_Owner (owner), m_RemoteEndpoint (socket->remote_endpoint ()),
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m_IsQuiet (true)
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{
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m_Stream = m_Owner->GetLocalDestination ()->CreateStream (*leaseSet);
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}
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I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner, std::shared_ptr<i2p::stream::Stream> stream,
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boost::asio::ip::tcp::socket * socket, const boost::asio::ip::tcp::endpoint& target, bool quiet):
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m_Socket (socket), m_Stream (stream), m_Owner (owner), m_RemoteEndpoint (target), m_IsQuiet (quiet)
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{
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}
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I2PTunnelConnection::~I2PTunnelConnection ()
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{
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delete m_Socket;
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}
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void I2PTunnelConnection::I2PConnect (const uint8_t * msg, size_t len)
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{
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if (msg)
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m_Stream->Send (msg, len); // connect and send
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else
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m_Stream->Send (m_Buffer, 0); // connect
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StreamReceive ();
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Receive ();
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}
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void I2PTunnelConnection::Connect ()
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{
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if (m_Socket)
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m_Socket->async_connect (m_RemoteEndpoint, std::bind (&I2PTunnelConnection::HandleConnect,
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shared_from_this (), std::placeholders::_1));
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}
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void I2PTunnelConnection::Terminate ()
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{
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if (m_Stream)
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{
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m_Stream->Close ();
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m_Stream.reset ();
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}
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m_Socket->close ();
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if (m_Owner)
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m_Owner->RemoveConnection (shared_from_this ());
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}
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void I2PTunnelConnection::Receive ()
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{
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m_Socket->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
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std::bind(&I2PTunnelConnection::HandleReceived, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2));
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}
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void I2PTunnelConnection::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (ecode)
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{
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LogPrint ("I2PTunnel read error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ();
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}
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else
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{
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if (m_Stream)
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m_Stream->Send (m_Buffer, bytes_transferred);
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Receive ();
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}
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}
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void I2PTunnelConnection::HandleWrite (const boost::system::error_code& ecode)
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{
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if (ecode)
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{
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LogPrint ("I2PTunnel write error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ();
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}
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else
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StreamReceive ();
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}
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void I2PTunnelConnection::StreamReceive ()
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{
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if (m_Stream)
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m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
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std::bind (&I2PTunnelConnection::HandleStreamReceive, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2),
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I2P_TUNNEL_CONNECTION_MAX_IDLE);
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}
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void I2PTunnelConnection::HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (ecode)
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{
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LogPrint ("I2PTunnel stream read error: ", ecode.message ());
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if (ecode != boost::asio::error::operation_aborted)
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Terminate ();
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}
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else
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{
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boost::asio::async_write (*m_Socket, boost::asio::buffer (m_StreamBuffer, bytes_transferred),
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std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1));
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}
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}
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void I2PTunnelConnection::HandleConnect (const boost::system::error_code& ecode)
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{
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if (ecode)
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{
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LogPrint ("I2PTunnel connect error: ", ecode.message ());
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Terminate ();
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}
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else
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{
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LogPrint ("I2PTunnel connected");
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if (m_IsQuiet)
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StreamReceive ();
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else
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{
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// send destination first like received from I2P
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std::string dest = m_Stream->GetRemoteIdentity ().ToBase64 ();
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dest += "\n";
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memcpy (m_StreamBuffer, dest.c_str (), dest.size ());
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HandleStreamReceive (boost::system::error_code (), dest.size ());
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}
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Receive ();
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}
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}
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void I2PTunnel::AddConnection (std::shared_ptr<I2PTunnelConnection> conn)
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{
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m_Connections.insert (conn);
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}
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void I2PTunnel::RemoveConnection (std::shared_ptr<I2PTunnelConnection> conn)
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{
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m_Connections.erase (conn);
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}
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void I2PTunnel::ClearConnections ()
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{
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m_Connections.clear ();
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}
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I2PClientTunnel::I2PClientTunnel (boost::asio::io_service& service, const std::string& destination,
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int port, ClientDestination * localDestination):
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I2PTunnel (service, localDestination ? localDestination :
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i2p::client::context.CreateNewLocalDestination (false, i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256)),
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m_Acceptor (service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
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m_Timer (service), m_Destination (destination), m_DestinationIdentHash (nullptr),
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m_RemoteLeaseSet (nullptr)
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{
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}
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I2PClientTunnel::~I2PClientTunnel ()
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{
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Stop ();
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}
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void I2PClientTunnel::Start ()
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{
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i2p::data::IdentHash identHash;
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if (i2p::client::context.GetAddressBook ().GetIdentHash (m_Destination, identHash))
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m_DestinationIdentHash = new i2p::data::IdentHash (identHash);
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if (!m_DestinationIdentHash)
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LogPrint ("I2PTunnel unknown destination ", m_Destination);
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m_Acceptor.listen ();
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Accept ();
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}
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void I2PClientTunnel::Stop ()
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{
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m_Acceptor.close();
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m_Timer.cancel ();
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ClearConnections ();
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m_DestinationIdentHash = nullptr;
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}
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void I2PClientTunnel::Accept ()
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{
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auto newSocket = new boost::asio::ip::tcp::socket (GetService ());
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m_Acceptor.async_accept (*newSocket, std::bind (&I2PClientTunnel::HandleAccept, this,
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std::placeholders::_1, newSocket));
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}
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void I2PClientTunnel::HandleAccept (const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket)
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{
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if (!ecode)
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{
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if (!m_DestinationIdentHash)
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{
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i2p::data::IdentHash identHash;
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if (i2p::client::context.GetAddressBook ().GetIdentHash (m_Destination, identHash))
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m_DestinationIdentHash = new i2p::data::IdentHash (identHash);
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}
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if (m_DestinationIdentHash)
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{
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// try to get a LeaseSet
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m_RemoteLeaseSet = GetLocalDestination ()->FindLeaseSet (*m_DestinationIdentHash);
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if (m_RemoteLeaseSet && m_RemoteLeaseSet->HasNonExpiredLeases ())
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CreateConnection (socket);
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else
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{
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GetLocalDestination ()->RequestDestination (*m_DestinationIdentHash);
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m_Timer.expires_from_now (boost::posix_time::seconds (I2P_TUNNEL_DESTINATION_REQUEST_TIMEOUT));
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m_Timer.async_wait (std::bind (&I2PClientTunnel::HandleDestinationRequestTimer,
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this, std::placeholders::_1, socket));
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}
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}
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else
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{
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LogPrint ("Remote destination ", m_Destination, " not found");
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delete socket;
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}
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Accept ();
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}
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else
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delete socket;
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}
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void I2PClientTunnel::HandleDestinationRequestTimer (const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket)
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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_DestinationIdentHash)
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{
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m_RemoteLeaseSet = GetLocalDestination ()->FindLeaseSet (*m_DestinationIdentHash);
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CreateConnection (socket);
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return;
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}
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}
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delete socket;
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}
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void I2PClientTunnel::CreateConnection (boost::asio::ip::tcp::socket * socket)
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{
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if (m_RemoteLeaseSet) // leaseSet found
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{
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LogPrint ("New I2PTunnel connection");
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auto connection = std::make_shared<I2PTunnelConnection>(this, socket, m_RemoteLeaseSet);
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AddConnection (connection);
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connection->I2PConnect ();
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}
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else
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{
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LogPrint ("LeaseSet for I2PTunnel destination not found");
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delete socket;
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}
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}
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I2PServerTunnel::I2PServerTunnel (boost::asio::io_service& service, const std::string& address, int port,
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ClientDestination * localDestination): I2PTunnel (service, localDestination),
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m_Endpoint (boost::asio::ip::address::from_string (address), port)
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{
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}
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void I2PServerTunnel::Start ()
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{
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Accept ();
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}
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void I2PServerTunnel::Stop ()
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{
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ClearConnections ();
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}
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void I2PServerTunnel::Accept ()
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{
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auto localDestination = GetLocalDestination ();
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if (localDestination)
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localDestination->AcceptStreams (std::bind (&I2PServerTunnel::HandleAccept, this, std::placeholders::_1));
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else
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LogPrint ("Local destination not set for server tunnel");
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}
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void I2PServerTunnel::HandleAccept (std::shared_ptr<i2p::stream::Stream> stream)
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{
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if (stream)
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{
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auto conn = std::make_shared<I2PTunnelConnection> (this, stream, new boost::asio::ip::tcp::socket (GetService ()), m_Endpoint);
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AddConnection (conn);
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conn->Connect ();
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}
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}
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}
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}
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