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270 lines
8.6 KiB
C++
270 lines
8.6 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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#ifndef I2PTUNNEL_H__
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#define I2PTUNNEL_H__
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#include <inttypes.h>
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#include <string>
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#include <set>
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#include <tuple>
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#include <memory>
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#include <sstream>
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#include <boost/asio.hpp>
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#include <boost/asio/ssl.hpp>
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#include "Identity.h"
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#include "Destination.h"
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#include "Streaming.h"
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#include "I2PService.h"
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#include "AddressBook.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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const size_t I2P_TUNNEL_CONNECTION_BUFFER_SIZE = 65536;
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const int I2P_TUNNEL_CONNECTION_MAX_IDLE = 3600; // in seconds
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const int I2P_TUNNEL_DESTINATION_REQUEST_TIMEOUT = 10; // in seconds
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// for HTTP tunnels
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const char X_I2P_DEST_HASH[] = "X-I2P-DestHash"; // hash in base64
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const char X_I2P_DEST_B64[] = "X-I2P-DestB64"; // full address in base64
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const char X_I2P_DEST_B32[] = "X-I2P-DestB32"; // .b32.i2p address
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const int I2P_TUNNEL_HTTP_MAX_HEADER_SIZE = 8192;
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class I2PTunnelConnection: public I2PServiceHandler, public std::enable_shared_from_this<I2PTunnelConnection>
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{
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public:
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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 = 0); // to I2P
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I2PTunnelConnection (I2PService * owner, std::shared_ptr<boost::asio::ip::tcp::socket> socket,
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std::shared_ptr<i2p::stream::Stream> stream); // to I2P using simplified API
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I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
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const boost::asio::ip::tcp::endpoint& target, bool quiet = true,
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std::shared_ptr<boost::asio::ssl::context> sslCtx = nullptr); // from I2P
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~I2PTunnelConnection ();
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void I2PConnect (const uint8_t * msg = nullptr, size_t len = 0);
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void Connect (bool isUniqueLocal = true);
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void Connect (const boost::asio::ip::address& localAddress);
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protected:
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void Terminate ();
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void Receive ();
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void StreamReceive ();
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virtual void Write (const uint8_t * buf, size_t len); // can be overloaded
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virtual void WriteToStream (const uint8_t * buf, size_t len); // can be overloaded
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std::shared_ptr<boost::asio::ip::tcp::socket> GetSocket () const { return m_Socket; };
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std::shared_ptr<boost::asio::ssl::stream<boost::asio::ip::tcp::socket&> > GetSSL () const { return m_SSL; };
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private:
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void HandleConnect (const boost::system::error_code& ecode);
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void HandleHandshake (const boost::system::error_code& ecode);
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void Established ();
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void HandleReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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void HandleWrite (const boost::system::error_code& ecode);
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void HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred);
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private:
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uint8_t m_Buffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE], m_StreamBuffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE];
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std::shared_ptr<boost::asio::ip::tcp::socket> m_Socket;
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std::shared_ptr<boost::asio::ssl::stream<boost::asio::ip::tcp::socket&> > m_SSL;
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std::shared_ptr<i2p::stream::Stream> m_Stream;
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boost::asio::ip::tcp::endpoint m_RemoteEndpoint;
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bool m_IsQuiet; // don't send destination
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};
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class I2PClientTunnelConnectionHTTP: public I2PTunnelConnection
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{
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public:
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I2PClientTunnelConnectionHTTP (I2PService * owner, std::shared_ptr<boost::asio::ip::tcp::socket> socket,
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std::shared_ptr<i2p::stream::Stream> stream):
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I2PTunnelConnection (owner, socket, stream), m_HeaderSent (false),
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m_ConnectionSent (false), m_ProxyConnectionSent (false) {};
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protected:
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void Write (const uint8_t * buf, size_t len);
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private:
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std::stringstream m_InHeader, m_OutHeader;
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bool m_HeaderSent, m_ConnectionSent, m_ProxyConnectionSent;
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};
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class I2PServerTunnelConnectionHTTP: public I2PTunnelConnection
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{
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public:
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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 = nullptr);
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protected:
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void Write (const uint8_t * buf, size_t len);
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void WriteToStream (const uint8_t * buf, size_t len);
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private:
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std::string m_Host;
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std::stringstream m_InHeader, m_OutHeader;
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bool m_HeaderSent, m_ResponseHeaderSent;
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std::shared_ptr<const i2p::data::IdentityEx> m_From;
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};
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class I2PTunnelConnectionIRC: public I2PTunnelConnection
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{
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public:
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I2PTunnelConnectionIRC (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
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const boost::asio::ip::tcp::endpoint& target, const std::string& m_WebircPass,
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std::shared_ptr<boost::asio::ssl::context> sslCtx = nullptr);
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protected:
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void Write (const uint8_t * buf, size_t len);
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private:
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std::shared_ptr<const i2p::data::IdentityEx> m_From;
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std::stringstream m_OutPacket, m_InPacket;
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bool m_NeedsWebIrc;
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std::string m_WebircPass;
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};
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class I2PClientTunnel: public TCPIPAcceptor
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{
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protected:
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// Implements TCPIPAcceptor
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std::shared_ptr<I2PServiceHandler> CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket);
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public:
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I2PClientTunnel (const std::string& name, const std::string& destination,
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const std::string& address, uint16_t port, std::shared_ptr<ClientDestination> localDestination, uint16_t destinationPort = 0);
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~I2PClientTunnel () {}
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void Start ();
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void Stop ();
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const char* GetName() { return m_Name.c_str (); }
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void SetKeepAliveInterval (uint32_t keepAliveInterval);
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private:
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std::shared_ptr<const Address> GetAddress ();
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void ScheduleKeepAliveTimer ();
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void HandleKeepAliveTimer (const boost::system::error_code& ecode);
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private:
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std::string m_Name, m_Destination;
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std::shared_ptr<const Address> m_Address;
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uint16_t m_DestinationPort;
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uint32_t m_KeepAliveInterval;
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std::unique_ptr<boost::asio::deadline_timer> m_KeepAliveTimer;
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};
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class I2PServerTunnel: public I2PService
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{
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public:
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I2PServerTunnel (const std::string& name, const std::string& address, uint16_t port,
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std::shared_ptr<ClientDestination> localDestination, uint16_t inport = 0, bool gzip = true);
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void Start ();
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void Stop ();
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void SetAccessList (const std::set<i2p::data::IdentHash>& accessList);
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void SetUniqueLocal (bool isUniqueLocal) { m_IsUniqueLocal = isUniqueLocal; }
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bool IsUniqueLocal () const { return m_IsUniqueLocal; }
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void SetSSL (bool ssl);
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std::shared_ptr<boost::asio::ssl::context> GetSSLCtx () const { return m_SSLCtx; };
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void SetLocalAddress (const std::string& localAddress);
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const std::string& GetAddress() const { return m_Address; }
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uint16_t GetPort () const { return m_Port; };
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uint16_t GetLocalPort () const { return m_PortDestination->GetLocalPort (); };
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const boost::asio::ip::tcp::endpoint& GetEndpoint () const { return m_Endpoint; }
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const char* GetName() { return m_Name.c_str (); }
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private:
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void HandleResolve (const boost::system::error_code& ecode, boost::asio::ip::tcp::resolver::iterator it,
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std::shared_ptr<boost::asio::ip::tcp::resolver> resolver);
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void Accept ();
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void HandleAccept (std::shared_ptr<i2p::stream::Stream> stream);
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virtual std::shared_ptr<I2PTunnelConnection> CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream);
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private:
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bool m_IsUniqueLocal;
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std::string m_Name, m_Address;
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uint16_t m_Port;
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boost::asio::ip::tcp::endpoint m_Endpoint;
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std::shared_ptr<i2p::stream::StreamingDestination> m_PortDestination;
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std::set<i2p::data::IdentHash> m_AccessList;
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bool m_IsAccessList;
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std::unique_ptr<boost::asio::ip::address> m_LocalAddress;
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std::shared_ptr<boost::asio::ssl::context> m_SSLCtx;
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};
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class I2PServerTunnelHTTP: public I2PServerTunnel
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{
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public:
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I2PServerTunnelHTTP (const std::string& name, const std::string& address, uint16_t port,
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std::shared_ptr<ClientDestination> localDestination, const std::string& host,
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uint16_t inport = 0, bool gzip = true);
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private:
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std::shared_ptr<I2PTunnelConnection> CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream);
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private:
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std::string m_Host;
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};
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class I2PServerTunnelIRC: public I2PServerTunnel
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{
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public:
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I2PServerTunnelIRC (const std::string& name, const std::string& address, uint16_t port,
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std::shared_ptr<ClientDestination> localDestination, const std::string& webircpass,
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uint16_t inport = 0, bool gzip = true);
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private:
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std::shared_ptr<I2PTunnelConnection> CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream);
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private:
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std::string m_WebircPass;
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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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}
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#endif
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