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899 lines
26 KiB
C++
899 lines
26 KiB
C++
/*
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* Copyright (c) 2013-2023, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#include <cassert>
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#include <boost/algorithm/string.hpp>
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#include "Base.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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#include "util.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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/** set standard socket options */
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static void I2PTunnelSetSocketOptions (std::shared_ptr<boost::asio::ip::tcp::socket> socket)
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{
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if (socket && socket->is_open())
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{
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boost::asio::socket_base::receive_buffer_size option(I2P_TUNNEL_CONNECTION_BUFFER_SIZE);
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socket->set_option(option);
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}
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}
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I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, std::shared_ptr<boost::asio::ip::tcp::socket> socket,
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std::shared_ptr<const i2p::data::LeaseSet> leaseSet, uint16_t port):
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I2PServiceHandler(owner), m_Socket (socket), m_RemoteEndpoint (socket->remote_endpoint ()),
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m_IsQuiet (true)
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{
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m_Stream = GetOwner()->GetLocalDestination ()->CreateStream (leaseSet, port);
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}
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I2PTunnelConnection::I2PTunnelConnection (I2PService * owner,
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std::shared_ptr<boost::asio::ip::tcp::socket> socket, std::shared_ptr<i2p::stream::Stream> stream):
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I2PServiceHandler(owner), m_Socket (socket), m_Stream (stream),
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m_RemoteEndpoint (socket->remote_endpoint ()), m_IsQuiet (true)
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{
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}
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I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
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const boost::asio::ip::tcp::endpoint& target, bool quiet,
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std::shared_ptr<boost::asio::ssl::context> sslCtx):
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I2PServiceHandler(owner), m_Stream (stream), m_RemoteEndpoint (target), m_IsQuiet (quiet)
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{
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m_Socket = std::make_shared<boost::asio::ip::tcp::socket> (owner->GetService ());
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if (sslCtx)
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m_SSL = std::make_shared<boost::asio::ssl::stream<boost::asio::ip::tcp::socket&> > (*m_Socket, *sslCtx);
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}
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I2PTunnelConnection::~I2PTunnelConnection ()
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{
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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 (m_Stream)
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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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}
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StreamReceive ();
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Receive ();
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}
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boost::asio::ip::address GetLoopbackAddressFor(const i2p::data::IdentHash & addr)
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{
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boost::asio::ip::address_v4::bytes_type bytes;
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const uint8_t * ident = addr;
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bytes[0] = 127;
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memcpy (bytes.data ()+1, ident, 3);
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boost::asio::ip::address ourIP = boost::asio::ip::address_v4 (bytes);
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return ourIP;
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}
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#ifdef __linux__
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static void MapToLoopback(std::shared_ptr<boost::asio::ip::tcp::socket> sock, const i2p::data::IdentHash & addr)
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{
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if (sock)
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{
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// bind to 127.x.x.x address
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// where x.x.x are first three bytes from ident
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auto ourIP = GetLoopbackAddressFor(addr);
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boost::system::error_code ec;
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sock->bind (boost::asio::ip::tcp::endpoint (ourIP, 0), ec);
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if (ec)
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LogPrint (eLogError, "I2PTunnel: Can't bind ourIP to ", ourIP.to_string (), ": ", ec.message ());
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}
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}
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#endif
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void I2PTunnelConnection::Connect (bool isUniqueLocal)
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{
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if (m_Socket)
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{
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I2PTunnelSetSocketOptions (m_Socket);
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#ifdef __linux__
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if (isUniqueLocal && m_RemoteEndpoint.address ().is_v4 () &&
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m_RemoteEndpoint.address ().to_v4 ().to_bytes ()[0] == 127)
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{
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m_Socket->open (boost::asio::ip::tcp::v4 ());
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auto ident = m_Stream->GetRemoteIdentity()->GetIdentHash();
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MapToLoopback(m_Socket, ident);
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}
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#endif
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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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}
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void I2PTunnelConnection::Connect (const boost::asio::ip::address& localAddress)
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{
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if (m_Socket)
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{
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if (m_RemoteEndpoint.address().is_v6 ())
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m_Socket->open (boost::asio::ip::tcp::v6 ());
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else
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m_Socket->open (boost::asio::ip::tcp::v4 ());
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boost::system::error_code ec;
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m_Socket->bind (boost::asio::ip::tcp::endpoint (localAddress, 0), ec);
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if (ec)
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LogPrint (eLogError, "I2PTunnel: Can't bind to ", localAddress.to_string (), ": ", ec.message ());
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}
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Connect (false);
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}
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void I2PTunnelConnection::Terminate ()
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{
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if (Kill()) return;
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if (m_SSL) m_SSL = nullptr;
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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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boost::system::error_code ec;
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m_Socket->shutdown(boost::asio::ip::tcp::socket::shutdown_send, ec); // avoid RST
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m_Socket->close ();
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Done(shared_from_this ());
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}
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void I2PTunnelConnection::Receive ()
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{
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if (m_SSL)
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m_SSL->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE),
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std::bind(&I2PTunnelConnection::HandleReceive, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2));
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else
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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::HandleReceive, shared_from_this (),
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std::placeholders::_1, std::placeholders::_2));
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}
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void I2PTunnelConnection::HandleReceive (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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if (ecode != boost::asio::error::operation_aborted)
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{
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LogPrint (eLogError, "I2PTunnel: Read error: ", ecode.message ());
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Terminate ();
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}
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}
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else
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WriteToStream (m_Buffer, bytes_transferred);
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}
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void I2PTunnelConnection::WriteToStream (const uint8_t * buf, size_t len)
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{
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if (m_Stream)
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{
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auto s = shared_from_this ();
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m_Stream->AsyncSend (buf, len,
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[s](const boost::system::error_code& ecode)
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{
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if (!ecode)
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s->Receive ();
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else
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s->Terminate ();
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});
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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 (eLogError, "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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{
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if (m_Stream->GetStatus () == i2p::stream::eStreamStatusNew ||
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m_Stream->GetStatus () == i2p::stream::eStreamStatusOpen) // regular
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{
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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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else // closed by peer
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{
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// get remaining data
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auto len = m_Stream->ReadSome (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE);
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if (len > 0) // still some data
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Write (m_StreamBuffer, len);
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else // no more data
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Terminate ();
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}
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}
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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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if (ecode != boost::asio::error::operation_aborted)
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{
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LogPrint (eLogError, "I2PTunnel: Stream read error: ", ecode.message ());
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if (bytes_transferred > 0)
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Write (m_StreamBuffer, bytes_transferred); // postpone termination
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else if (ecode == boost::asio::error::timed_out && m_Stream && m_Stream->IsOpen ())
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StreamReceive ();
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else
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Terminate ();
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}
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else
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Terminate ();
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}
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else
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Write (m_StreamBuffer, bytes_transferred);
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}
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void I2PTunnelConnection::Write (const uint8_t * buf, size_t len)
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{
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if (m_SSL)
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boost::asio::async_write (*m_SSL, boost::asio::buffer (buf, len), boost::asio::transfer_all (),
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std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1));
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else
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boost::asio::async_write (*m_Socket, boost::asio::buffer (buf, len), boost::asio::transfer_all (),
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std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1));
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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 (eLogError, "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 (eLogDebug, "I2PTunnel: Connected");
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if (m_SSL)
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m_SSL->async_handshake (boost::asio::ssl::stream_base::client,
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std::bind (&I2PTunnelConnection::HandleHandshake, shared_from_this (), std::placeholders::_1));
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else
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Established ();
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}
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}
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void I2PTunnelConnection::HandleHandshake (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 (eLogError, "I2PTunnel: Handshake 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 (eLogDebug, "I2PTunnel: SSL connected");
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Established ();
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}
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}
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void I2PTunnelConnection::Established ()
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{
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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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if(sizeof(m_StreamBuffer) >= dest.size()) {
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memcpy (m_StreamBuffer, dest.c_str (), dest.size ());
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}
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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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void I2PClientTunnelConnectionHTTP::Write (const uint8_t * buf, size_t len)
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{
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if (m_HeaderSent)
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I2PTunnelConnection::Write (buf, len);
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else
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{
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m_InHeader.clear ();
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m_InHeader.write ((const char *)buf, len);
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std::string line;
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bool endOfHeader = false;
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while (!endOfHeader)
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{
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std::getline(m_InHeader, line);
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if (!m_InHeader.fail ())
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{
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if (line == "\r") endOfHeader = true;
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else
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{
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if (!m_ConnectionSent && !line.compare(0, 10, "Connection"))
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{
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/* close connection, if not Connection: (U|u)pgrade (for websocket) */
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auto x = line.find("pgrade");
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if (x != std::string::npos && std::tolower(line[x - 1]) == 'u')
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m_OutHeader << line << "\r\n";
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else
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m_OutHeader << "Connection: close\r\n";
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m_ConnectionSent = true;
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}
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else if (!m_ProxyConnectionSent && !line.compare(0, 16, "Proxy-Connection"))
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{
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m_OutHeader << "Proxy-Connection: close\r\n";
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m_ProxyConnectionSent = true;
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}
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else
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m_OutHeader << line << "\n";
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}
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}
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else
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{
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// insert incomplete line back
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m_InHeader.clear ();
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m_InHeader << line;
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break;
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}
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}
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if (endOfHeader)
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{
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if (!m_ConnectionSent) m_OutHeader << "Connection: close\r\n";
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if (!m_ProxyConnectionSent) m_OutHeader << "Proxy-Connection: close\r\n";
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m_OutHeader << "\r\n"; // end of header
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m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header
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m_InHeader.str ("");
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m_HeaderSent = true;
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I2PTunnelConnection::Write ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ());
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}
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else if (m_OutHeader.tellp () < I2P_TUNNEL_HTTP_MAX_HEADER_SIZE)
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StreamReceive (); // read more header
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else
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{
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LogPrint (eLogError, "I2PTunnel: HTTP header exceeds max size ", I2P_TUNNEL_HTTP_MAX_HEADER_SIZE);
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Terminate ();
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}
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}
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}
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I2PServerTunnelConnectionHTTP::I2PServerTunnelConnectionHTTP (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
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const boost::asio::ip::tcp::endpoint& target, const std::string& host,
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std::shared_ptr<boost::asio::ssl::context> sslCtx):
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I2PTunnelConnection (owner, stream, target, true, sslCtx), m_Host (host),
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m_HeaderSent (false), m_ResponseHeaderSent (false), m_From (stream->GetRemoteIdentity ())
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{
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if (sslCtx)
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SSL_set_tlsext_host_name(GetSSL ()->native_handle(), host.c_str ());
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}
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void I2PServerTunnelConnectionHTTP::Write (const uint8_t * buf, size_t len)
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{
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if (m_HeaderSent)
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I2PTunnelConnection::Write (buf, len);
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else
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{
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m_InHeader.clear ();
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m_InHeader.write ((const char *)buf, len);
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std::string line;
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bool endOfHeader = false, connection = false;
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while (!endOfHeader)
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{
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std::getline(m_InHeader, line);
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if (m_InHeader.fail ()) break;
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if (!m_InHeader.eof ())
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{
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if (line == "\r") endOfHeader = true;
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else
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{
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// strip up some headers
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static const std::vector<std::string> excluded // list of excluded headers
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{
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"Keep-Alive:", "X-I2P"
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};
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bool matched = false;
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for (const auto& it: excluded)
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if (boost::iequals (line.substr (0, it.length ()), it))
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{
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matched = true;
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break;
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}
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if (matched) continue;
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// replace some headers
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if (!m_Host.empty () && boost::iequals (line.substr (0, 5), "Host:"))
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m_OutHeader << "Host: " << m_Host << "\r\n"; // override host
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else if (boost::iequals (line.substr (0, 11), "Connection:"))
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{
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auto x = line.find("pgrade");
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if (x != std::string::npos && x && std::tolower(line[x - 1]) != 'u') // upgrade or Upgrade
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m_OutHeader << line << "\n";
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else
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m_OutHeader << "Connection: close\r\n";
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connection = true;
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}
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else // forward as is
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m_OutHeader << line << "\n";
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}
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}
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else
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{
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// insert incomplete line back
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m_InHeader.clear ();
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m_InHeader << line;
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break;
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}
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}
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if (endOfHeader)
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{
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// add Connection if not presented
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if (!connection)
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m_OutHeader << "Connection: close\r\n";
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// add X-I2P fields
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if (m_From)
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{
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m_OutHeader << X_I2P_DEST_B32 << ": " << context.GetAddressBook ().ToAddress(m_From->GetIdentHash ()) << "\r\n";
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m_OutHeader << X_I2P_DEST_HASH << ": " << m_From->GetIdentHash ().ToBase64 () << "\r\n";
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m_OutHeader << X_I2P_DEST_B64 << ": " << m_From->ToBase64 () << "\r\n";
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}
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m_OutHeader << "\r\n"; // end of header
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m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header
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m_InHeader.str ("");
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m_From = nullptr;
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m_HeaderSent = true;
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I2PTunnelConnection::Write ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ());
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}
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else if (m_OutHeader.tellp () < I2P_TUNNEL_HTTP_MAX_HEADER_SIZE)
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StreamReceive (); // read more header
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else
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{
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LogPrint (eLogError, "I2PTunnel: HTTP header exceeds max size ", I2P_TUNNEL_HTTP_MAX_HEADER_SIZE);
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Terminate ();
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}
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}
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}
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void I2PServerTunnelConnectionHTTP::WriteToStream (const uint8_t * buf, size_t len)
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{
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if (m_ResponseHeaderSent)
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I2PTunnelConnection::WriteToStream (buf, len);
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else
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{
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m_InHeader.clear ();
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if (m_InHeader.str ().empty ()) m_OutHeader.str (""); // start of response
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m_InHeader.write ((const char *)buf, len);
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std::string line;
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bool endOfHeader = false;
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while (!endOfHeader)
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{
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std::getline(m_InHeader, line);
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if (m_InHeader.fail ()) break;
|
|
if (!m_InHeader.eof ())
|
|
{
|
|
if (line == "\r") endOfHeader = true;
|
|
else
|
|
{
|
|
static const std::vector<std::string> excluded // list of excluded headers
|
|
{
|
|
"Server:", "Date:", "X-Runtime:", "X-Powered-By:", "Proxy"
|
|
};
|
|
bool matched = false;
|
|
for (const auto& it: excluded)
|
|
if (!line.compare(0, it.length (), it))
|
|
{
|
|
matched = true;
|
|
break;
|
|
}
|
|
if (!matched)
|
|
m_OutHeader << line << "\n";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// insert incomplete line back
|
|
m_InHeader.clear ();
|
|
m_InHeader << line;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (endOfHeader)
|
|
{
|
|
m_OutHeader << "\r\n"; // end of header
|
|
m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header
|
|
m_InHeader.str ("");
|
|
m_ResponseHeaderSent = true;
|
|
I2PTunnelConnection::WriteToStream ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ());
|
|
m_OutHeader.str ("");
|
|
}
|
|
else
|
|
Receive ();
|
|
}
|
|
}
|
|
|
|
I2PTunnelConnectionIRC::I2PTunnelConnectionIRC (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
|
|
const boost::asio::ip::tcp::endpoint& target, const std::string& webircpass,
|
|
std::shared_ptr<boost::asio::ssl::context> sslCtx):
|
|
I2PTunnelConnection (owner, stream, target, true, sslCtx), m_From (stream->GetRemoteIdentity ()),
|
|
m_NeedsWebIrc (webircpass.length() ? true : false), m_WebircPass (webircpass)
|
|
{
|
|
}
|
|
|
|
void I2PTunnelConnectionIRC::Write (const uint8_t * buf, size_t len)
|
|
{
|
|
m_OutPacket.str ("");
|
|
if (m_NeedsWebIrc)
|
|
{
|
|
m_NeedsWebIrc = false;
|
|
m_OutPacket << "WEBIRC " << m_WebircPass << " cgiirc " << context.GetAddressBook ().ToAddress (m_From->GetIdentHash ())
|
|
<< " " << GetSocket ()->local_endpoint ().address () << std::endl;
|
|
}
|
|
|
|
m_InPacket.clear ();
|
|
m_InPacket.write ((const char *)buf, len);
|
|
|
|
while (!m_InPacket.eof () && !m_InPacket.fail ())
|
|
{
|
|
std::string line;
|
|
std::getline (m_InPacket, line);
|
|
if (line.length () == 0 && m_InPacket.eof ())
|
|
m_InPacket.str ("");
|
|
auto pos = line.find ("USER");
|
|
if (!pos) // start of line
|
|
{
|
|
pos = line.find (" ");
|
|
pos++;
|
|
pos = line.find (" ", pos);
|
|
pos++;
|
|
auto nextpos = line.find (" ", pos);
|
|
m_OutPacket << line.substr (0, pos);
|
|
m_OutPacket << context.GetAddressBook ().ToAddress (m_From->GetIdentHash ());
|
|
m_OutPacket << line.substr (nextpos) << '\n';
|
|
}
|
|
else
|
|
m_OutPacket << line << '\n';
|
|
}
|
|
I2PTunnelConnection::Write ((uint8_t *)m_OutPacket.str ().c_str (), m_OutPacket.str ().length ());
|
|
}
|
|
|
|
|
|
/* This handler tries to establish 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, std::shared_ptr<const Address> address,
|
|
uint16_t destinationPort, std::shared_ptr<boost::asio::ip::tcp::socket> socket):
|
|
I2PServiceHandler(parent), m_Address(address),
|
|
m_DestinationPort (destinationPort), m_Socket(socket) {};
|
|
void Handle();
|
|
void Terminate();
|
|
private:
|
|
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
|
|
std::shared_ptr<const Address> m_Address;
|
|
uint16_t m_DestinationPort;
|
|
std::shared_ptr<boost::asio::ip::tcp::socket> m_Socket;
|
|
};
|
|
|
|
void I2PClientTunnelHandler::Handle()
|
|
{
|
|
GetOwner()->CreateStream (
|
|
std::bind (&I2PClientTunnelHandler::HandleStreamRequestComplete, shared_from_this(), std::placeholders::_1),
|
|
m_Address, m_DestinationPort);
|
|
}
|
|
|
|
void I2PClientTunnelHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
|
|
{
|
|
if (stream)
|
|
{
|
|
if (Kill()) return;
|
|
LogPrint (eLogDebug, "I2PTunnel: New connection");
|
|
auto connection = std::make_shared<I2PTunnelConnection>(GetOwner(), m_Socket, stream);
|
|
GetOwner()->AddHandler (connection);
|
|
connection->I2PConnect ();
|
|
Done(shared_from_this());
|
|
}
|
|
else
|
|
{
|
|
LogPrint (eLogError, "I2PTunnel: 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();
|
|
m_Socket = nullptr;
|
|
}
|
|
Done(shared_from_this());
|
|
}
|
|
|
|
I2PClientTunnel::I2PClientTunnel (const std::string& name, const std::string& destination,
|
|
const std::string& address, uint16_t port, std::shared_ptr<ClientDestination> localDestination, uint16_t destinationPort):
|
|
TCPIPAcceptor (address, port, localDestination), m_Name (name), m_Destination (destination),
|
|
m_DestinationPort (destinationPort), m_KeepAliveInterval (0)
|
|
{
|
|
}
|
|
|
|
void I2PClientTunnel::Start ()
|
|
{
|
|
TCPIPAcceptor::Start ();
|
|
GetAddress ();
|
|
if (m_KeepAliveInterval)
|
|
ScheduleKeepAliveTimer ();
|
|
}
|
|
|
|
void I2PClientTunnel::Stop ()
|
|
{
|
|
TCPIPAcceptor::Stop();
|
|
m_Address = nullptr;
|
|
if (m_KeepAliveTimer) m_KeepAliveTimer->cancel ();
|
|
}
|
|
|
|
void I2PClientTunnel::SetKeepAliveInterval (uint32_t keepAliveInterval)
|
|
{
|
|
m_KeepAliveInterval = keepAliveInterval;
|
|
if (m_KeepAliveInterval)
|
|
m_KeepAliveTimer.reset (new boost::asio::deadline_timer (GetLocalDestination ()->GetService ()));
|
|
}
|
|
|
|
/* HACK: maybe we should create a caching IdentHash provider in AddressBook */
|
|
std::shared_ptr<const Address> I2PClientTunnel::GetAddress ()
|
|
{
|
|
if (!m_Address)
|
|
{
|
|
m_Address = i2p::client::context.GetAddressBook ().GetAddress (m_Destination);
|
|
if (!m_Address)
|
|
LogPrint (eLogWarning, "I2PTunnel: Remote destination ", m_Destination, " not found");
|
|
}
|
|
return m_Address;
|
|
}
|
|
|
|
std::shared_ptr<I2PServiceHandler> I2PClientTunnel::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket)
|
|
{
|
|
auto address = GetAddress ();
|
|
if (address)
|
|
return std::make_shared<I2PClientTunnelHandler>(this, address, m_DestinationPort, socket);
|
|
else
|
|
return nullptr;
|
|
}
|
|
|
|
void I2PClientTunnel::ScheduleKeepAliveTimer ()
|
|
{
|
|
if (m_KeepAliveTimer)
|
|
{
|
|
m_KeepAliveTimer->expires_from_now (boost::posix_time::seconds (m_KeepAliveInterval));
|
|
m_KeepAliveTimer->async_wait (std::bind (&I2PClientTunnel::HandleKeepAliveTimer,
|
|
this, std::placeholders::_1));
|
|
}
|
|
}
|
|
|
|
void I2PClientTunnel::HandleKeepAliveTimer (const boost::system::error_code& ecode)
|
|
{
|
|
if (ecode != boost::asio::error::operation_aborted)
|
|
{
|
|
if (m_Address && m_Address->IsValid ())
|
|
{
|
|
if (m_Address->IsIdentHash ())
|
|
GetLocalDestination ()->SendPing (m_Address->identHash);
|
|
else
|
|
GetLocalDestination ()->SendPing (m_Address->blindedPublicKey);
|
|
}
|
|
ScheduleKeepAliveTimer ();
|
|
}
|
|
}
|
|
|
|
I2PServerTunnel::I2PServerTunnel (const std::string& name, const std::string& address,
|
|
uint16_t port, std::shared_ptr<ClientDestination> localDestination, uint16_t inport, bool gzip):
|
|
I2PService (localDestination), m_IsUniqueLocal(true), m_Name (name), m_Address (address), m_Port (port), m_IsAccessList (false)
|
|
{
|
|
m_PortDestination = localDestination->GetStreamingDestination (inport);
|
|
if (!m_PortDestination) // default destination
|
|
m_PortDestination = localDestination->CreateStreamingDestination (inport, gzip);
|
|
}
|
|
|
|
void I2PServerTunnel::Start ()
|
|
{
|
|
m_Endpoint.port (m_Port);
|
|
boost::system::error_code ec;
|
|
auto addr = boost::asio::ip::address::from_string (m_Address, ec);
|
|
if (!ec)
|
|
{
|
|
m_Endpoint.address (addr);
|
|
Accept ();
|
|
}
|
|
else
|
|
{
|
|
auto resolver = std::make_shared<boost::asio::ip::tcp::resolver>(GetService ());
|
|
resolver->async_resolve (boost::asio::ip::tcp::resolver::query (m_Address, ""),
|
|
std::bind (&I2PServerTunnel::HandleResolve, this,
|
|
std::placeholders::_1, std::placeholders::_2, resolver));
|
|
}
|
|
}
|
|
|
|
void I2PServerTunnel::Stop ()
|
|
{
|
|
if (m_PortDestination)
|
|
m_PortDestination->ResetAcceptor ();
|
|
auto localDestination = GetLocalDestination ();
|
|
if (localDestination)
|
|
localDestination->StopAcceptingStreams ();
|
|
|
|
ClearHandlers ();
|
|
}
|
|
|
|
void I2PServerTunnel::HandleResolve (const boost::system::error_code& ecode, boost::asio::ip::tcp::resolver::iterator it,
|
|
std::shared_ptr<boost::asio::ip::tcp::resolver> resolver)
|
|
{
|
|
if (!ecode)
|
|
{
|
|
bool found = false;
|
|
boost::asio::ip::tcp::endpoint ep;
|
|
if (m_LocalAddress)
|
|
{
|
|
boost::asio::ip::tcp::resolver::iterator end;
|
|
while (it != end)
|
|
{
|
|
ep = *it;
|
|
if (!ep.address ().is_unspecified ())
|
|
{
|
|
if (ep.address ().is_v4 ())
|
|
{
|
|
if (m_LocalAddress->is_v4 ()) found = true;
|
|
}
|
|
else if (ep.address ().is_v6 ())
|
|
{
|
|
if (i2p::util::net::IsYggdrasilAddress (ep.address ()))
|
|
{
|
|
if (i2p::util::net::IsYggdrasilAddress (*m_LocalAddress))
|
|
found = true;
|
|
}
|
|
else if (m_LocalAddress->is_v6 ())
|
|
found = true;
|
|
}
|
|
}
|
|
if (found) break;
|
|
it++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
found = true;
|
|
ep = *it; // first available
|
|
}
|
|
if (!found)
|
|
{
|
|
LogPrint (eLogError, "I2PTunnel: Unable to resolve to compatible address");
|
|
return;
|
|
}
|
|
|
|
auto addr = ep.address ();
|
|
LogPrint (eLogInfo, "I2PTunnel: Server tunnel ", (*it).host_name (), " has been resolved to ", addr);
|
|
m_Endpoint.address (addr);
|
|
Accept ();
|
|
}
|
|
else
|
|
LogPrint (eLogError, "I2PTunnel: Unable to resolve server tunnel address: ", ecode.message ());
|
|
}
|
|
|
|
void I2PServerTunnel::SetAccessList (const std::set<i2p::data::IdentHash>& accessList)
|
|
{
|
|
m_AccessList = accessList;
|
|
m_IsAccessList = true;
|
|
}
|
|
|
|
void I2PServerTunnel::SetLocalAddress (const std::string& localAddress)
|
|
{
|
|
boost::system::error_code ec;
|
|
auto addr = boost::asio::ip::address::from_string(localAddress, ec);
|
|
if (!ec)
|
|
m_LocalAddress.reset (new boost::asio::ip::address (addr));
|
|
else
|
|
LogPrint (eLogError, "I2PTunnel: Can't set local address ", localAddress);
|
|
}
|
|
|
|
void I2PServerTunnel::SetSSL (bool ssl)
|
|
{
|
|
if (ssl)
|
|
{
|
|
m_SSLCtx = std::make_shared<boost::asio::ssl::context> (boost::asio::ssl::context::sslv23);
|
|
m_SSLCtx->set_verify_mode(boost::asio::ssl::context::verify_none);
|
|
}
|
|
else
|
|
m_SSLCtx = nullptr;
|
|
}
|
|
|
|
void I2PServerTunnel::Accept ()
|
|
{
|
|
if (m_PortDestination)
|
|
m_PortDestination->SetAcceptor (std::bind (&I2PServerTunnel::HandleAccept, this, std::placeholders::_1));
|
|
|
|
auto localDestination = GetLocalDestination ();
|
|
if (localDestination)
|
|
{
|
|
if (!localDestination->IsAcceptingStreams ()) // set it as default if not set yet
|
|
localDestination->AcceptStreams (std::bind (&I2PServerTunnel::HandleAccept, this, std::placeholders::_1));
|
|
}
|
|
else
|
|
LogPrint (eLogError, "I2PTunnel: Local destination not set for server tunnel");
|
|
}
|
|
|
|
void I2PServerTunnel::HandleAccept (std::shared_ptr<i2p::stream::Stream> stream)
|
|
{
|
|
if (stream)
|
|
{
|
|
if (m_IsAccessList)
|
|
{
|
|
if (!m_AccessList.count (stream->GetRemoteIdentity ()->GetIdentHash ()))
|
|
{
|
|
LogPrint (eLogWarning, "I2PTunnel: Address ", stream->GetRemoteIdentity ()->GetIdentHash ().ToBase32 (), " is not in white list. Incoming connection dropped");
|
|
stream->Close ();
|
|
return;
|
|
}
|
|
}
|
|
// new connection
|
|
auto conn = CreateI2PConnection (stream);
|
|
AddHandler (conn);
|
|
if (m_LocalAddress)
|
|
conn->Connect (*m_LocalAddress);
|
|
else
|
|
conn->Connect (m_IsUniqueLocal);
|
|
}
|
|
}
|
|
|
|
std::shared_ptr<I2PTunnelConnection> I2PServerTunnel::CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream)
|
|
{
|
|
return std::make_shared<I2PTunnelConnection> (this, stream, GetEndpoint (), true, m_SSLCtx);
|
|
|
|
}
|
|
|
|
I2PServerTunnelHTTP::I2PServerTunnelHTTP (const std::string& name, const std::string& address,
|
|
uint16_t port, std::shared_ptr<ClientDestination> localDestination,
|
|
const std::string& host, uint16_t inport, bool gzip):
|
|
I2PServerTunnel (name, address, port, localDestination, inport, gzip),
|
|
m_Host (host)
|
|
{
|
|
}
|
|
|
|
std::shared_ptr<I2PTunnelConnection> I2PServerTunnelHTTP::CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream)
|
|
{
|
|
return std::make_shared<I2PServerTunnelConnectionHTTP> (this, stream, GetEndpoint (), m_Host, GetSSLCtx ());
|
|
}
|
|
|
|
I2PServerTunnelIRC::I2PServerTunnelIRC (const std::string& name, const std::string& address,
|
|
uint16_t port, std::shared_ptr<ClientDestination> localDestination,
|
|
const std::string& webircpass, uint16_t inport, bool gzip):
|
|
I2PServerTunnel (name, address, port, localDestination, inport, gzip),
|
|
m_WebircPass (webircpass)
|
|
{
|
|
}
|
|
|
|
std::shared_ptr<I2PTunnelConnection> I2PServerTunnelIRC::CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream)
|
|
{
|
|
return std::make_shared<I2PTunnelConnectionIRC> (this, stream, GetEndpoint (), m_WebircPass, GetSSLCtx ());
|
|
}
|
|
}
|
|
}
|
|
|